Audi Vehicle Models Audi S3 1999-2003
Audi Vehicle Models Audi S3 1999-2003 Torque Specifications
Complete Audi Vehicle Models Audi S3 1999-2003 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.
Updated
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
Prevention:
Always use a calibrated torque wrench and follow specifications exactly.
Incorrect Torque Sequence
Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.
Prevention:
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
Prevention:
Clean and inspect all threads before assembly. Use new thread locker if specified.
Reusing TTY Bolts
Torque-to-yield bolts are designed to stretch and must not be reused.
Prevention:
Always replace TTY bolts with new ones. They are single-use only.
Dry vs. Lubricated
Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.
Prevention:
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Range: 2-25 ft-lbs
Small fasteners, delicate components
Torque Wrench (3/8" Drive)
Range: 10-100 ft-lbs
Most common automotive fasteners
Torque Wrench (1/2" Drive)
Range: 30-250 ft-lbs
Large fasteners, wheels
Angle Gauge
Torque-to-yield (TTY) bolts
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
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1.8l Engine
Torque specifications for 1.8L Engine
1.8l Engine
Torque specifications for 1.8L Engine
Cylinder Head
1 Cylinder Head Bolts (Long)
M10 x 1.5
1
Cylinder Head Bolts (Long)
M10 x 1.5
Torque Specification
1. 44 ft-lbs (60 N·m)
2. 90°
3. 90°
Important Notes
These are stretch bolts and must be replaced. Torque sequence should follow a specific pattern, generally from the center outwards. Apply new oil to bolt threads.
2 Cylinder Head Bolts (Short)
M10 x 1.5
2
Cylinder Head Bolts (Short)
M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m)
2. 90°
3. 90°
Important Notes
These are stretch bolts and must be replaced. Torque sequence should follow a specific pattern, generally from the center outwards. Apply new oil to bolt threads.
3 Camshaft Bearing Cap Bolts
M6 x 1.0
3
Camshaft Bearing Cap Bolts
M6 x 1.0
Torque Specification
1. 7 ft-lbs (10 N·m)
2. 90°
Important Notes
These are stretch bolts and should be replaced upon removal. Proper torque prevents excessive play and wear on the camshaft journals. Tighten in sequence from center outwards.
Engine Block
1 Main Bearing Cap Bolts
M10 x 1.5
1
Main Bearing Cap Bolts
M10 x 1.5
Torque Specification
1. 44 ft-lbs (60 N·m)
2. 90°
Important Notes
These are stretch bolts and must be replaced. Torque sequence should be followed from the center outwards. Apply new oil to bolt threads.
2 Connecting Rod Cap Bolts
M9 x 1.0
2
Connecting Rod Cap Bolts
M9 x 1.0
Torque Specification
1. 22 ft-lbs (30 N·m)
2. 90°
Important Notes
Stretch bolts, must be replaced. Proper torque is crucial to avoid engine failure. Apply new oil to bolt threads.
3 Oil Pan Bolts
M6 x 1.0
3
Oil Pan Bolts
M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure oil pan mating surface is clean and free of damage before installation. Tighten in a crisscross pattern from the center outwards.
4 Oil Drain Plug
M14 x 1.5
4
Oil Drain Plug
M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Always use a new crush washer with each oil change. Do not over-tighten.
Intake Exhaust
1 Intake Manifold Bolts
M8 x 1.25
1
Intake Manifold Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure intake manifold mating surface is clean and free of damage. Tighten in a crisscross pattern from the center outwards.
2 Exhaust Manifold Bolts (to Cylinder Head)
M8 x 1.25
2
Exhaust Manifold Bolts (to Cylinder Head)
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new gaskets. Tighten in a crisscross pattern from the center outwards. Apply anti-seize to bolt threads if needed.
3 Turbocharger to Exhaust Manifold Bolts
M10 x 1.5
3
Turbocharger to Exhaust Manifold Bolts
M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use new gaskets. Tighten evenly.
4 Turbocharger to Downpipe Bolts
M10 x 1.5
4
Turbocharger to Downpipe Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use new gaskets. Tighten evenly.
5 Throttle Body Bolts
M6 x 1.0
5
Throttle Body Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the mating surfaces are clean. Do not over-tighten. Tighten in a crisscross pattern.
Timing Drive
1 Timing Belt Tensioner Bolt
M8 x 1.25
1
Timing Belt Tensioner Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the timing belt tensioner is properly positioned before tightening.
2 Timing Belt Idler Pulley Bolt
M8 x 1.25
2
Timing Belt Idler Pulley Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the timing belt idler pulley is properly positioned before tightening.
3 Crankshaft Pulley Bolt
M18 x 2.0
3
Crankshaft Pulley Bolt
M18 x 2.0
Torque Specification
1. 66 ft-lbs (90 N·m)
2. 90°
Important Notes
This is a stretch bolt and must be replaced. Torque to yield. Apply new oil to bolt threads.
4 Water Pump Bolts
M6 x 1.0
4
Water Pump Bolts
M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure the mating surfaces are clean and use a new gasket or sealant. Tighten evenly.
Other Components
1 Starter Motor Bolts
M10 x 1.5
1
Starter Motor Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the starter motor is properly aligned before tightening. Tighten evenly.
2 Alternator Bolts
M8 x 1.25
2
Alternator Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the alternator is properly positioned before tightening. Tighten evenly.
3 Engine Mount Bolts (to Engine Block)
M10 x 1.5
3
Engine Mount Bolts (to Engine Block)
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure engine mounts are aligned correctly before tightening.
4 Coolant Flange Bolts (Typically on cylinder head and block)
M6 x 1.0
4
Coolant Flange Bolts (Typically on cylinder head and block)
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Use new gaskets or O-rings, tighten in a crisscross pattern, do not over-tighten.
Body
Torque specifications for Body
Body
Torque specifications for Body
Front Bumper
1 Front Bumper Cover Mounting Bolts (Upper)
M6 x 1.0
1
Front Bumper Cover Mounting Bolts (Upper)
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar Audi models and standard M6 bolt torque.
2 Front Bumper Cover Mounting Bolts (Lower)
M8 x 1.25
2
Front Bumper Cover Mounting Bolts (Lower)
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar Audi models and standard M8 bolt torque.
3 Bumper Reinforcement Mounting Bolts
M10 x 1.5
3
Bumper Reinforcement Mounting Bolts
M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
4 Fog Light Mounting Bolts
M5 x 0.8
4
Fog Light Mounting Bolts
M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on standard M5 bolt torque.
5 Bumper Impact Absorber Mounting Bolts
M8 x 1.25
5
Bumper Impact Absorber Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
Fenders
1 Fender Mounting Bolts (To Body)
M8 x 1.25
1
Fender Mounting Bolts (To Body)
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
2 Fender Liner Mounting Screws/Bolts
M5 x 0.8
2
Fender Liner Mounting Screws/Bolts
M5 x 0.8
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Estimated value based on typical plastic fastener torque.
Hood
1 Hood Hinge Bolts (to hood)
M8 x 1.25
1
Hood Hinge Bolts (to hood)
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
2 Hood Hinge Bolts (to body)
M8 x 1.25
2
Hood Hinge Bolts (to body)
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
3 Hood Latch Mounting Bolts
M6 x 1.0
3
Hood Latch Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value based on standard M6 bolt torque and application.
4 Hood Strut Mounting Bolts
M6 x 1.0
4
Hood Strut Mounting Bolts
M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on standard M6/M8 bolt torque and application.
Doors
1 Door Hinge Bolts (To Body)
M10 x 1.5
1
Door Hinge Bolts (To Body)
M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
2 Door Hinge Bolts (To Door)
M10 x 1.5
2
Door Hinge Bolts (To Door)
M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
3 Door Latch/Striker Plate Mounting Bolts
M8 x 1.25
3
Door Latch/Striker Plate Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
4 Door Handle Mounting Bolts
M6 x 1.0
4
Door Handle Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value based on standard M6 bolt torque and application.
5 Door Panel Mounting Screws/Clips
N/A
5
Door Panel Mounting Screws/Clips
N/A
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Hand-tighten only; estimated value based on standard plastic fastener torque and panel application. Use care to not over-tighten.
Rear Bumper
1 Rear Bumper Cover Mounting Bolts (Upper)
M6 x 1.0
1
Rear Bumper Cover Mounting Bolts (Upper)
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar Audi models and standard M6 bolt torque.
2 Rear Bumper Cover Mounting Bolts (Lower)
M8 x 1.25
2
Rear Bumper Cover Mounting Bolts (Lower)
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar Audi models and standard M8 bolt torque.
3 Bumper Reinforcement Mounting Bolts
M10 x 1.5
3
Bumper Reinforcement Mounting Bolts
M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
4 Bumper Impact Absorber Mounting Bolts
M8 x 1.25
4
Bumper Impact Absorber Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
Trunk Hatch
1 Trunk/Hatch Hinge Bolts (To Body)
M8 x 1.25
1
Trunk/Hatch Hinge Bolts (To Body)
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
2 Trunk/Hatch Hinge Bolts (To Trunk/Hatch)
M8 x 1.25
2
Trunk/Hatch Hinge Bolts (To Trunk/Hatch)
M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Based on similar Audi A3 models of the same era.
3 Trunk/Hatch Latch Mounting Bolts
M6 x 1.0
3
Trunk/Hatch Latch Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value based on standard M6 bolt torque and application.
4 Trunk/Hatch Strut Mounting Bolts
M6 x 1.0
4
Trunk/Hatch Strut Mounting Bolts
M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on standard M6/M8 bolt torque and application.
Body Trim Misc
1 Side Skirt Mounting Screws
N/A
1
Side Skirt Mounting Screws
N/A
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value based on standard plastic fastener torque and trim application.
2 Roof Rail Mounting Bolts (If Equipped)
M8 x 1.25
2
Roof Rail Mounting Bolts (If Equipped)
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on similar Audi models and standard M8 bolt torque.
3 Mirror Mounting Bolts
M6 x 1.0
3
Mirror Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value based on standard M6 bolt torque and application.
4 License Plate Lamp Mounting Bolts
N/A
4
License Plate Lamp Mounting Bolts
N/A
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Estimated value based on standard plastic fastener torque.
Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Front Brakes
1 Front Caliper Mounting Bolts
M12 x 1.5
1
Front Caliper Mounting Bolts
M12 x 1.5
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Critical. Secures caliper to the hub/carrier. Ensure proper torque for even braking and to prevent component movement. Torque to spec. Do not overtighten.
2 Front Caliper Guide Pin Bolts
M8 x 1.25
2
Front Caliper Guide Pin Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures caliper body to the bracket, allowing movement on guide pins. Estimated value based on size and application.
3 Front Brake Disc Retaining Bolt
M6 x 1.0
3
Front Brake Disc Retaining Bolt
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Holds rotor to hub during installation. Do not overtighten. Estimated value based on similar components and size.
4 Front Brake Hose Banjo Bolt (caliper end)
M10 x 1.0
4
Front Brake Hose Banjo Bolt (caliper end)
M10 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Critical. Connects brake hose to caliper. Use new copper washers and do not overtighten. Ensure no leaks.
5 Front Brake Hose Bracket Bolt (to strut)
M6 x 1.0
5
Front Brake Hose Bracket Bolt (to strut)
M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Secures brake line to strut, preventing interference. Estimated based on size and similar applications. Do not overtighten.
Rear Brakes
1 Rear Caliper Mounting Bolts
M12 x 1.5
1
Rear Caliper Mounting Bolts
M12 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Critical. Secures caliper to the hub/carrier. Similar to front, ensure proper torque. Do not overtighten.
2 Rear Caliper Guide Pin Bolts
M8 x 1.25
2
Rear Caliper Guide Pin Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures caliper body to the bracket. Ensure smooth movement. Estimated value.
3 Rear Brake Disc Retaining Bolt
M6 x 1.0
3
Rear Brake Disc Retaining Bolt
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Holds rotor during installation. Do not overtighten. Estimated value based on size and similar applications.
4 Rear Brake Hose Banjo Bolt (caliper end)
M10 x 1.0
4
Rear Brake Hose Banjo Bolt (caliper end)
M10 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Critical. Connects hose to caliper. Use new washers. Ensure no leaks. Do not overtighten.
5 Rear Brake Hose Bracket Bolt (to trailing arm or body)
M6 x 1.0
5
Rear Brake Hose Bracket Bolt (to trailing arm or body)
M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Secures line to body or trailing arm. Estimated based on size and similar applications. Do not overtighten.
Parking Brake
1 Parking Brake Cable Bracket Bolts
M6 x 1.0
1
Parking Brake Cable Bracket Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Secures the cable housing to the underbody. Estimated value. Do not overtighten.
2 Parking Brake Cable Adjustment Bolt/Nut
N/A
2
Parking Brake Cable Adjustment Bolt/Nut
N/A
Torque Specification
N/A
Important Notes
Follow service manual for specific cable tensioning. Torque value is not applicable. Adjust until taut, then back off as specified.
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Transmission
1 Transmission to Engine Bolts
M10 x 1.5
1
Transmission to Engine Bolts
M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures the transmission housing to the engine block. Failure can lead to drivetrain misalignment, vibrations, and potentially catastrophic damage.
2 Transmission Mount Bolts
M10 x 1.5
2
Transmission Mount Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Secures the transmission to the chassis, dampening vibrations. Critical for preventing drivetrain stress.
3 Selector Shaft Bolt
M8 x 1.25
3
Selector Shaft Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Retains the selector shaft mechanism within the transmission. Estimated value.
4 Drain Plug
M24
4
Drain Plug
M24
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Seals the transmission fluid drain point. Proper torque ensures a leak-free seal.
5 Fill Plug
M22
5
Fill Plug
M22
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Seals the transmission fluid fill point. Proper torque prevents leaks and allows for correct filling.
6 Clutch Slave Cylinder Bolts
M6 x 1.0
6
Clutch Slave Cylinder Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Secures the slave cylinder. Overtightening can cause the housing to crack. Estimated value.
Transfer Case
1 Transfer Case to Transmission Bolts
M10 x 1.5
1
Transfer Case to Transmission Bolts
M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures the transfer case to the transmission. Critical for maintaining alignment of the four-wheel-drive system.
2 Transfer Case Mounting Bolts
M10 x 1.5
2
Transfer Case Mounting Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Attaches the transfer case to the chassis. Ensures proper positioning and vibration isolation.
3 Transfer Case Output Flange Bolt/Nut
M10 x 1.5
3
Transfer Case Output Flange Bolt/Nut
M10 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m)
2. 90°
Important Notes
Holds the output flange/yoke to the transfer case. Must be at the specified torque plus angle due to it being a stretch bolt. New bolt/nut MUST be used.
4 Transfer Case Drain/Fill Plugs
M18-M20
4
Transfer Case Drain/Fill Plugs
M18-M20
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Seals the transfer case fluid drain and fill points. Proper torque is essential to prevent leaks.
Driveshaft
1 Driveshaft to Transmission Flange Bolts
M10 x 1.5
1
Driveshaft to Transmission Flange Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Connects the driveshaft to the transmission output flange. Proper torque prevents vibrations and joint failure.
2 Driveshaft Center Support Bearing Bolts
M8 x 1.25
2
Driveshaft Center Support Bearing Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Secures the center support bearing to the chassis. Maintains alignment and reduces driveshaft vibration.
3 Driveshaft to Rear Differential Flange Bolts
M10 x 1.5
3
Driveshaft to Rear Differential Flange Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Connects the driveshaft to the rear differential. Proper torque ensures secure power transfer and prevents joint failure.
Rear Differential
1 Differential to Subframe Bolts
M12 x 1.75
1
Differential to Subframe Bolts
M12 x 1.75
Torque Specification
60 ft-lbs (80 N·m)
Important Notes
Secures the differential housing to the rear subframe. Critical for proper alignment and preventing drivetrain movement and vibrations.
2 Differential Cover Bolts
M8 x 1.25
2
Differential Cover Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Secures the rear differential cover. Proper torque prevents leaks, while over-tightening can damage the gasket.
3 Differential Drain/Fill Plugs
M18-M20
3
Differential Drain/Fill Plugs
M18-M20
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Seals the differential fluid drain and fill points. Proper torque prevents leaks.
4 Rear Driveshaft Flange Bolt/Nut
M10 x 1.5
4
Rear Driveshaft Flange Bolt/Nut
M10 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m)
2. 90°
Important Notes
Secures the rear driveshaft flange. MUST be at specified torque plus angle because it is a stretch bolt. New bolt/nut MUST be used
Wheel Hubs Axles
1 Front Axle Nut
M24 x 1.5
1
Front Axle Nut
M24 x 1.5
Torque Specification
1. 148 ft-lbs (200 N·m)
2. 180°
Important Notes
Secures the front wheel hub bearing to the axle shaft. MUST be at specified torque plus angle, as this is a stretch bolt. New nut is ALWAYS required.
2 Rear Axle Nut
M20 x 1.5
2
Rear Axle Nut
M20 x 1.5
Torque Specification
1. 125 ft-lbs (170 N·m)
2. 90°
Important Notes
Secures the rear wheel hub bearing to the axle shaft. MUST be at specified torque plus angle, as this is a stretch bolt. New nut is ALWAYS required.
3 Wheel Lug Bolts
M14 x 1.5
3
Wheel Lug Bolts
M14 x 1.5
Torque Specification
89 ft-lbs (120 N·m)
Important Notes
Secures the wheel to the hub. Over-tightening can damage wheel studs and under-tightening can result in wheel loss.
4 Inner CV Joint bolts
M8 x 1.25
4
Inner CV Joint bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Fastens the CV joint to the transmission or differential flange. Ensure secure power transfer and prevents joint failure. Estimated value.
5 Outer CV Joint bolts
M8 x 1.25
5
Outer CV Joint bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Fastens the CV joint to the wheel hub. Ensures secure power transfer. Estimated value.
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Battery System
1 Battery Terminal Clamps
M6
1
Battery Terminal Clamps
M6
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensures good electrical contact and prevents battery arcing. Located at battery positive and negative terminals. Torque to specification, do not overtighten.
2 Battery Hold-Down Bolt
M8
2
Battery Hold-Down Bolt
M8
Torque Specification
14.8 ft-lbs (20 N·m)
Important Notes
Securely holds the battery in place, preventing movement and damage. Located at base of battery. Estimated value.
Starting System
1 Starter Motor Mounting Bolts
M10 x 1.5
1
Starter Motor Mounting Bolts
M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Critically important for secure starter attachment. Bolts located at engine block to starter housing.
2 Starter Solenoid Nut
M6
2
Starter Solenoid Nut
M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensures proper electrical connection to starter solenoid. Located at the solenoid terminal. Estimated value.
Charging System
1 Alternator Mounting Bolts
M8 x 1.25
1
Alternator Mounting Bolts
M8 x 1.25
Torque Specification
18.4 ft-lbs (25 N·m)
Important Notes
Secures the alternator to the engine, ensuring correct belt tension and preventing vibration. Located at alternator bracket.
2 Alternator B+ Terminal Nut
M6
2
Alternator B+ Terminal Nut
M6
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensures a secure connection for power output from the alternator. Located on the alternator B+ post.
Grounding System
1 Ground Strap Bolts
M8 x 1.25
1
Ground Strap Bolts
M8 x 1.25
Torque Specification
14.8 ft-lbs (20 N·m)
Important Notes
Provides a crucial low-resistance ground path. Located throughout chassis and engine bay. Estimated value.
Control Units
1 Engine Control Unit (ECU) Mounting Bolts
M6
1
Engine Control Unit (ECU) Mounting Bolts
M6
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Securely holds the ECU in place, preventing vibration and electrical damage. Located in the ECU compartment. Estimated value.
2 ABS Control Unit Mounting Bolts
M6
2
ABS Control Unit Mounting Bolts
M6
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Secures the ABS control module to the chassis or bracket. Located under hood or cabin. Estimated value.
3 Door Control Module Mounting Screws/Bolts
M5
3
Door Control Module Mounting Screws/Bolts
M5
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Secures the door control module to the door frame, preventing rattling and ensuring reliable operation. Located within door panel. Estimated value.
Relay And Fuse Boxes
1 Relay Box Mounting Bolts
M6
1
Relay Box Mounting Bolts
M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Secures the relay box to the chassis/mounting, preventing movement. Found within engine bay/cabin. Estimated value.
2 Fuse Box Mounting Bolts
M6
2
Fuse Box Mounting Bolts
M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Securely fastens the fuse box to its mounting location to prevent vibration and damage. Often located in the engine compartment or dash area. Estimated value.
Lighting
1 Headlight Assembly Mounting Bolts
M6
1
Headlight Assembly Mounting Bolts
M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensures the headlight is securely attached to the body, preventing movement and light misalignment. Located on headlight assembly bracket. Estimated value.
2 Tail Light Assembly Mounting Bolts
M5
2
Tail Light Assembly Mounting Bolts
M5
Torque Specification
4.4 ft-lbs (6 N·m)
Important Notes
Holds the tail light in place, protecting the light assembly and wiring connections. Located on the light assembly. Estimated value.
3 Interior Lighting Fixture Mounting Bolts
M4
3
Interior Lighting Fixture Mounting Bolts
M4
Torque Specification
2.2 ft-lbs (3 N·m)
Important Notes
Fastens interior lights, preventing rattles and ensures proper fitment. Located throughout interior cabin. Estimated value.
Instrumentation
1 Instrument Cluster Mounting Bolts
M5
1
Instrument Cluster Mounting Bolts
M5
Torque Specification
4.4 ft-lbs (6 N·m)
Important Notes
Holds the instrument cluster securely in place behind the dashboard. Located in dashboard area. Estimated value.
Wiper System
1 Wiper Motor Mounting Bolts
M6
1
Wiper Motor Mounting Bolts
M6
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Securely attaches the wiper motor, allowing proper function. Located in engine bay near wiper linkage. Estimated value.
Window System
1 Window Regulator Motor Mounting Bolts
M6
1
Window Regulator Motor Mounting Bolts
M6
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Holds the motor in place, enabling proper window function. Located inside the door panel. Estimated value.
Wiring Harness
1 Connector Bracket Mounting Bolts
M6
1
Connector Bracket Mounting Bolts
M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Fastens wiring harness brackets. Prevents wires from chafing. Found throughout the engine bay, under the dash, and along the body. Estimated value.
Sensors
1 Sensor Mounting Screws (M6)
M6
1
Sensor Mounting Screws (M6)
M6
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Fastens sensors securely to mounting points. Ensures accurate sensor operation. Estimated value.
2 Sensor Mounting Screws (M5)
M5
2
Sensor Mounting Screws (M5)
M5
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Fastens sensors securely to mounting points. Ensures accurate sensor operation. Estimated value.
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Oxygen Sensors
1 Pre-Catalyst Oxygen Sensor Mounting Bolt
M18 x 1.5
1
Pre-Catalyst Oxygen Sensor Mounting Bolt
M18 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure threads are clean and sensor is seated properly. Use anti-seize compound on threads.
2 Post-Catalyst Oxygen Sensor Mounting Bolt
M18 x 1.5
2
Post-Catalyst Oxygen Sensor Mounting Bolt
M18 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure threads are clean and sensor is seated properly. Use anti-seize compound on threads.
Air Intake
1 Mass Air Flow (MAF) Sensor Mounting Bolts
M5 x 0.8
1
Mass Air Flow (MAF) Sensor Mounting Bolts
M5 x 0.8
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
These bolts secure the MAF sensor to the air intake housing. Over-tightening can damage the plastic housing. Estimated value.
Evaporative Emissions
1 EVAP Canister Mounting Bolts
M6 x 1.0
1
EVAP Canister Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the EVAP canister to the vehicle chassis. Ensure proper alignment before tightening.
2 EVAP Purge Valve Mounting Bolt(s)
M6 x 1.0
2
EVAP Purge Valve Mounting Bolt(s)
M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Bolts securing the EVAP purge valve to a bracket or the intake manifold. Estimated value.
3 EVAP System Line Clamps
N/A - Hose Clamp
3
EVAP System Line Clamps
N/A - Hose Clamp
Torque Specification
1.5 ft-lbs (2 N·m)
Important Notes
Gentle torque only, do not over-tighten. This is an estimated value and based on feel. Ensure an airtight seal without crushing the hose.
Exhaust System
1 Exhaust Manifold to Cylinder Head Bolts
M10 x 1.5
1
Exhaust Manifold to Cylinder Head Bolts
M10 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m)
2. 90°
Important Notes
Use new bolts. Torque in a star pattern starting from the center bolts. Additional 90 degrees rotation ensures correct clamping force. Use a torque angle wrench. Always replace these bolts when removing exhaust manifold.
2 Catalytic Converter to Downpipe Bolts
M12 x 1.75
2
Catalytic Converter to Downpipe Bolts
M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure new gasket is installed and bolts are tightened evenly. Estimated value.
Engine Cooling
1 Engine Coolant Temperature Sensor
N/A - Threaded Sensor
1
Engine Coolant Temperature Sensor
N/A - Threaded Sensor
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure new seal/washer is installed and sensor is seated correctly. This is a general torque specification for similar threaded sensors.
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold
1 Exhaust Manifold to Cylinder Head Bolts
M8 x 1.25
1
Exhaust Manifold to Cylinder Head Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure even pressure. Estimated bolt size.
2 Exhaust Manifold to Downpipe Flange Bolts/Studs and Nuts
M10 x 1.5
2
Exhaust Manifold to Downpipe Flange Bolts/Studs and Nuts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure a new gasket is used. Estimated bolt size.
3 Exhaust Manifold Heat Shield Bolts/Nuts
M6 x 1.0
3
Exhaust Manifold Heat Shield Bolts/Nuts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
These bolts secure the heat shields to the exhaust manifold. Estimated based on bolt size.
Downpipe
1 Downpipe to Catalytic Converter Flange Bolts
M8 x 1.25
1
Downpipe to Catalytic Converter Flange Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Typically uses spring bolts to allow for thermal expansion.
2 Catalytic Converter to Center Exhaust Pipe Flange Bolts/Studs and Nuts
M8 x 1.25
2
Catalytic Converter to Center Exhaust Pipe Flange Bolts/Studs and Nuts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure a new gasket is used.
Center Exhaust
1 Center Exhaust Pipe to Rear Muffler Section Bolts (Flanged)
M8 x 1.25
1
Center Exhaust Pipe to Rear Muffler Section Bolts (Flanged)
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper gasket alignment.
2 Center Exhaust Pipe to Rear Muffler Clamp Bolt (Clamp Style)
Varies
2
Center Exhaust Pipe to Rear Muffler Clamp Bolt (Clamp Style)
Varies
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the clamp is properly aligned before tightening. Estimated based on typical clamp bolt size.
Mounting Hardware
1 Rear Muffler Hanger Bolts/Rubber Mount to Chassis
M10 x 1.5
1
Rear Muffler Hanger Bolts/Rubber Mount to Chassis
M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the rubber mounts are correctly seated.
Sensors And Clamps
1 Oxygen Sensor (O2 Sensor) into Exhaust Pipe/Catalytic Converter
M18 x 1.5
1
Oxygen Sensor (O2 Sensor) into Exhaust Pipe/Catalytic Converter
M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Typically tightened 'hand tight + 1/2 turn'. May be more precise to use a torque spec based on crush washer. Estimated value based on typical torque.
2 Exhaust System Clamp Bolts
Varies
2
Exhaust System Clamp Bolts
Varies
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated based on typical clamp bolt sizes. Ensure even clamping pressure.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Fuel Pump Assembly
1 Fuel Pump Assembly Mounting Bolts (Tank Access)
M6 x 1.0
1
Fuel Pump Assembly Mounting Bolts (Tank Access)
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts in a criss-cross pattern. Estimated value based on similar year Audi model and industry standards for in-tank pump mounts.
2 Fuel Pump Bracket Bolts (Inside Tank)
M5 x 0.8
2
Fuel Pump Bracket Bolts (Inside Tank)
M5 x 0.8
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Estimated value based on industry standards for in-tank components. Do not over-tighten.
3 Fuel Level Sending Unit Mounting Bolts
M4 x 0.7
3
Fuel Level Sending Unit Mounting Bolts
M4 x 0.7
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Estimated value based on in-tank fuel sensor components. Do not overtighten these small fasteners.
Fuel Filter
1 Fuel Filter Bracket Bolts (Underbody)
M8 x 1.25
1
Fuel Filter Bracket Bolts (Underbody)
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Standard torque for M8 bolts in this application.
2 Fuel Line Banjo Bolt at Fuel Filter
M12 x 1.5
2
Fuel Line Banjo Bolt at Fuel Filter
M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Critical for a fuel-tight seal. Always replace copper washers. Standard torque for M12 Banjo Bolts on fuel lines.
Fuel Rail
1 Fuel Line Banjo Bolt at Fuel Rail
M12 x 1.5
1
Fuel Line Banjo Bolt at Fuel Rail
M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Critical for a fuel-tight seal. Always replace copper washers. Standard torque for M12 Banjo Bolts on fuel lines.
2 Fuel Injector Rail Mounting Bolts
M6 x 1.0
2
Fuel Injector Rail Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly in stages to avoid distorting the rail. Standard torque for M6 bolts in this application.
3 Fuel Injector Retaining Clips/Bolts (where applicable)
M4 x 0.7
3
Fuel Injector Retaining Clips/Bolts (where applicable)
M4 x 0.7
Torque Specification
2.2 ft-lbs (3 N·m)
Important Notes
Low torque specification, do not over-tighten. Estimated value, use with caution.
4 Fuel Pressure Regulator Mounting Bolts
M6 x 1.0
4
Fuel Pressure Regulator Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Standard torque for M6 bolts in this application.
Fuel Tank
1 Fuel Tank Filler Neck Bolts
M8 x 1.25
1
Fuel Tank Filler Neck Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated based on similar application in VW/Audi models.
Evap System
1 EVAP Canister Mounting Bolts
M6 x 1.0
1
EVAP Canister Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated based on similar application in VW/Audi models.
Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
Compressor Subsystem
1 Compressor Mounting Bolts
M8 x 1.25
1
Compressor Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the compressor to the engine block/mounting bracket. Tighten in a star pattern in multiple steps. Values estimated from similar Audi/VW models.
2 Compressor Clutch Bolt
M6 x 1.0
2
Compressor Clutch Bolt
M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Secures the clutch to the compressor shaft. Values estimated from similar Audi/VW models.
Condenser Subsystem
1 Condenser Mounting Bolts
M6 x 1.0
1
Condenser Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the condenser to the vehicle's frame or core support. Avoid overtightening. Values estimated from similar Audi/VW models.
Receiver Drier Subsystem
1 Receiver Drier Mounting Bracket Bolts
M6 x 1.0
1
Receiver Drier Mounting Bracket Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the receiver drier bracket to the chassis. Values estimated from similar Audi/VW models.
Expansion Valve Subsystem
1 Expansion Valve Mounting Bolts
M6 x 1.0
1
Expansion Valve Mounting Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the expansion valve to the evaporator core. Ensure sealing washers are in place. Values estimated from similar Audi/VW models.
Evaporator Subsystem
1 Evaporator Core Mounting Bolts (Housing)
M5 x 0.8
1
Evaporator Core Mounting Bolts (Housing)
M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Holds the two halves of the evaporator core housing together. Estimated value based on similar applications.
Hvac Control Subsystem
1 HVAC Control Panel Mounting Screws
M4 x 0.7
1
HVAC Control Panel Mounting Screws
M4 x 0.7
Torque Specification
2.5 ft-lbs (3.5 N·m)
Important Notes
Secures the climate control unit within the dashboard. Estimated value based on standard interior components.
2 Blend Door Actuator Mounting Screws
M4 x 0.7
2
Blend Door Actuator Mounting Screws
M4 x 0.7
Torque Specification
2.5 ft-lbs (3.5 N·m)
Important Notes
Holds the blend door actuator in place. Estimated value based on small plastic component mounting.
Blower Motor Subsystem
1 Blower Motor Mounting Screws
M5 x 0.8
1
Blower Motor Mounting Screws
M5 x 0.8
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Holds the blower motor in its housing. Estimated based on plastic housing and similar components.
Ac Line Fittings
1 High and Low Side A/C Line Fittings
Varies based on fitting type
1
High and Low Side A/C Line Fittings
Varies based on fitting type
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
For standard flared connections. Always use correct A/C line wrench. Values are industry standard for flared A/C fittings.
Sensor Subsystem
1 Temperature Sensor Mounting Screw
M3 x 0.5
1
Temperature Sensor Mounting Screw
M3 x 0.5
Torque Specification
1.5 ft-lbs (2 N·m)
Important Notes
Secures the temperature sensor to the HVAC system. Estimated based on small plastic mounting applications.
Duct Subsystem
1 Interior Duct Mounting Screws/Clips
Varies based on clip or screw type
1
Interior Duct Mounting Screws/Clips
Varies based on clip or screw type
Torque Specification
2 ft-lbs (2.5 N·m)
Important Notes
These secure the ductwork to the dashboard and interior structure. Estimated, tighten until snug. Typically small screws. Avoid over tightening.
Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Front Suspension
1 Strut to Steering Knuckle Bolts (Lower)
M12 x 1.5
1
Strut to Steering Knuckle Bolts (Lower)
M12 x 1.5
Torque Specification
60 ft-lbs (80 N·m)
Important Notes
Critical for suspension integrity and safety. Failure can lead to loss of vehicle control.
2 Strut to Steering Knuckle Bolt (Top - Upper)
M10 x 1.5
2
Strut to Steering Knuckle Bolt (Top - Upper)
M10 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m)
2. 90°
Important Notes
Ensures the upper part of the knuckle is secure against the strut.
3 Strut Top Mount Bolts (to Body)
M8 x 1.25
3
Strut Top Mount Bolts (to Body)
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the top of the strut assembly to the vehicle body.
4 Anti-Roll Bar (Sway Bar) Link to Strut
M10 x 1.5
4
Anti-Roll Bar (Sway Bar) Link to Strut
M10 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Connects the sway bar link to the strut assembly, critical for reducing body roll.
5 Anti-Roll Bar (Sway Bar) Link to Anti-Roll Bar
M8 x 1.25
5
Anti-Roll Bar (Sway Bar) Link to Anti-Roll Bar
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Connects the sway bar link to the anti-roll bar itself.
6 Lower Control Arm Ball Joint to Steering Knuckle Bolt
M12 x 1.5
6
Lower Control Arm Ball Joint to Steering Knuckle Bolt
M12 x 1.5
Torque Specification
1. 44 ft-lbs (60 N·m)
2. 90°
Important Notes
Secures the lower control arm ball joint to the steering knuckle. Critical for proper preload.
7 Lower Control Arm Front Bolt to Subframe
M12 x 1.5
7
Lower Control Arm Front Bolt to Subframe
M12 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m)
2. 90°
Important Notes
Secures the front of the lower control arm to the subframe, critical for suspension geometry.
8 Lower Control Arm Rear Bolt to Subframe
M12 x 1.5
8
Lower Control Arm Rear Bolt to Subframe
M12 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m)
2. 90°
Important Notes
Secures the rear of the lower control arm to the subframe, important for suspension geometry.
9 Subframe Bolts
M12 x 1.5
9
Subframe Bolts
M12 x 1.5
Torque Specification
1. 74 ft-lbs (100 N·m)
2. 90°
Important Notes
Attaches the front subframe to the car's chassis. Critical for chassis stiffness and stability.
10 Brake Caliper Mounting Bolts (Front)
M12 x 1.5
10
Brake Caliper Mounting Bolts (Front)
M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the brake caliper to the steering knuckle. Use thread locker.
Rear Suspension
1 Shock Absorber Lower Mount Bolt
M12 x 1.5
1
Shock Absorber Lower Mount Bolt
M12 x 1.5
Torque Specification
1. 44 ft-lbs (60 N·m)
2. 90°
Important Notes
Attaches the bottom of the rear shock absorber to the rear axle.
2 Shock Absorber Upper Mount Bolts (to Body)
M8 x 1.25
2
Shock Absorber Upper Mount Bolts (to Body)
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the top of the shock absorber to the vehicle’s body.
3 Rear Trailing Arm Front Bolt
M12 x 1.5
3
Rear Trailing Arm Front Bolt
M12 x 1.5
Torque Specification
1. 74 ft-lbs (100 N·m)
2. 90°
Important Notes
Secures the front of the trailing arm to the chassis. Critical for proper suspension geometry.
4 Rear Trailing Arm Rear Bolt
M12 x 1.5
4
Rear Trailing Arm Rear Bolt
M12 x 1.5
Torque Specification
1. 74 ft-lbs (100 N·m)
2. 90°
Important Notes
Secures the rear of the trailing arm to the chassis, essential for proper suspension operation.
5 Rear Upper Control Arm Inner Bolt (to Body)
M12 x 1.5
5
Rear Upper Control Arm Inner Bolt (to Body)
M12 x 1.5
Torque Specification
1. 48 ft-lbs (65 N·m)
2. 90°
Important Notes
Secures the inside of the rear upper control arm to the body, important for stability.
6 Rear Upper Control Arm Outer Bolt (to Hub Carrier)
M12 x 1.5
6
Rear Upper Control Arm Outer Bolt (to Hub Carrier)
M12 x 1.5
Torque Specification
1. 44 ft-lbs (60 N·m)
2. 90°
Important Notes
Secures the outside of the rear upper control arm to the hub carrier.
7 Rear Lower Control Arm Inner Bolt (to Subframe)
M12 x 1.5
7
Rear Lower Control Arm Inner Bolt (to Subframe)
M12 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m)
2. 90°
Important Notes
Secures the inside of the lower control arm to the rear subframe.
8 Rear Lower Control Arm Outer Bolt (to Hub Carrier)
M12 x 1.5
8
Rear Lower Control Arm Outer Bolt (to Hub Carrier)
M12 x 1.5
Torque Specification
1. 44 ft-lbs (60 N·m)
2. 90°
Important Notes
Secures the outside of the rear lower control arm to the hub carrier.
9 Rear Anti-Roll Bar (Sway Bar) Mounting Bolts (to Body)
M8 x 1.25
9
Rear Anti-Roll Bar (Sway Bar) Mounting Bolts (to Body)
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secure the sway bar mounting brackets to the chassis, important for sway bar function.
10 Rear Anti-Roll Bar (Sway Bar) Link to Control Arm
M10 x 1.5
10
Rear Anti-Roll Bar (Sway Bar) Link to Control Arm
M10 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Connects the sway bar links to the control arm for body roll reduction.
11 Rear Hub Carrier to Axle Bolt
M12 x 1.5
11
Rear Hub Carrier to Axle Bolt
M12 x 1.5
Torque Specification
1. 52 ft-lbs (70 N·m)
2. 90°
Important Notes
Secures the hub/wheel bearing assembly to the rear suspension arm. Apply thread locker.
12 Rear Brake Caliper Mounting Bolts
M10 x 1.5
12
Rear Brake Caliper Mounting Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Secures the brake caliper to the hub carrier. Apply thread locker.
Vl300 Transmission
Torque specifications for Vl300 Transmission
Vl300 Transmission
Torque specifications for Vl300 Transmission
Transmission Housing
1 Transmission Housing Bolts
M8 x 1.25
1
Transmission Housing Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a crisscross pattern to ensure even clamping force.
Engine Mounting
1 Transmission-to-Engine Mounting Bolts
M12 x 1.75
1
Transmission-to-Engine Mounting Bolts
M12 x 1.75
Torque Specification
1. 44 ft-lbs (60 N·m)
2. 90°
Important Notes
Tighten to specified torque, then rotate an additional 90 degrees. Use new bolts if available.
Starter Mounting
1 Starter Mounting Bolts
M10 x 1.5
1
Starter Mounting Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure starter is properly aligned before tightening.
Gear Selector
1 Gear Selector Mechanism Bolts
M6 x 1.0
1
Gear Selector Mechanism Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are low torque fasteners, do not over-tighten.
Input Shaft
1 Input Shaft Cover Bolts
M8 x 1.25
1
Input Shaft Cover Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten in a crisscross pattern to ensure even sealing.
Output Flange
1 Output Flange Bolts
M10 x 1.5
1
Output Flange Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure flange is properly seated before tightening.
Transmission Mount
1 Transmission Mount Bolts
M12 x 1.75
1
Transmission Mount Bolts
M12 x 1.75
Torque Specification
1. 33 ft-lbs (45 N·m)
2. 90°
Important Notes
Tighten to specified torque, then rotate an additional 90 degrees. Use new bolts if available.
Reverse Light Switch
1 Reverse Light Switch Bolt
M10 x 1.5
1
Reverse Light Switch Bolt
M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Do not over-tighten to avoid damaging the sensor.
Transmission Oil Pan
1 Transmission Oil Pan Bolts
M6 x 1.0
1
Transmission Oil Pan Bolts
M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Tighten in a crisscross pattern for even sealing.
2 Transmission Oil Drain Plug
M16 x 1.5
2
Transmission Oil Drain Plug
M16 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new sealing washer when available.
Differential Cover
1 Differential Cover Bolts
M8 x 1.25
1
Differential Cover Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten in a crisscross pattern for even sealing.
Speed Sensor
1 Speed Sensor Bolt
M6 x 1.0
1
Speed Sensor Bolt
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not over-tighten as this can damage the sensor.
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Loose Components
Symptoms:
- Rattling or vibration noises
- Visible movement in components
- Uneven panel gaps
Solutions:
- Clean threads and mounting surfaces
- Replace damaged fasteners
- Apply proper torque in sequence
- Use thread locker if specified
Stripped Fasteners
Symptoms:
- Unable to achieve proper torque
- Fastener spins freely
- Visible thread damage
Solutions:
- Use thread repair kit if appropriate
- Install thread insert (HeliCoil)
- Replace component if threaded hole is damaged
- Upgrade to higher grade fastener if recommended
Overtightened Components
Symptoms:
- Cracked or deformed parts
- Broken fasteners
- Compressed gaskets or seals
Solutions:
- Replace damaged components
- Use new fasteners
- Follow proper torque sequence
- Verify correct torque specifications
Diagnostic Steps
Visual inspection, torque verification, thread assessment
Diagnostic Steps
Visual inspection, torque verification, thread assessment
1
Visual Inspection
Inspect the affected area for any visible signs of damage or wear
- Check for cracks or deformation
- Look for signs of excessive wear
- Verify proper fastener installation
2
Torque Verification
Verify the torque applied to the fasteners
- Check the torque wrench calibration
- Verify the torque specification
- Compare the applied torque to the specification
3
Thread Assessment
Assess the condition of the threads
- Check for signs of thread damage
- Verify the thread type and size
- Check for proper thread engagement
Prevention Guidelines
Best practices, maintenance tips, tool care
Prevention Guidelines
Best practices, maintenance tips, tool care
Best Practices
- Always follow the recommended torque specification
- Use the correct type and size of fasteners
- Verify the torque wrench calibration regularly
Maintenance Tips
- Regularly inspect the affected area for signs of wear or damage
- Replace damaged or worn-out components promptly
- Keep the work area clean and organized
Tool Care
- Regularly clean and maintain the torque wrench
- Store the torque wrench in a dry and secure location
- Verify the torque wrench calibration before each use
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What IS the recommended torque specification for the engine cylinder head bolts?
Q1
What IS the recommended torque specification for the engine cylinder head bolts?
Refer to Audi Technical Specification (ATS) 3342 for proper torque values and tightening sequence specific to the engine variant.
Q2 What torque wrench should I use for critical components like the suspension control arms?
Q2
What torque wrench should I use for critical components like the suspension control arms?
Use a calibrated, click-type torque wrench that meets or exceeds DIN EN ISO 6789 standards for accurate torque application.
Q3 IS it necessary to re-torque bolts and nuts after a period of time?
Q3
IS it necessary to re-torque bolts and nuts after a period of time?
Yes, certain critical components such as wheel bolts and suspension components may require re-torquing after a break-in period or specified mileage intervals.
Q4 What IS the proper way to torque bolts in a multi-bolt pattern?
Q4
What IS the proper way to torque bolts in a multi-bolt pattern?
Follow ATS 5583 for the correct sequence and technique for tightening multiple bolts in sequence to achieve even distribution of force.
Q5 Can I use a regular wrench to tighten bolts to the specified torque?
Q5
Can I use a regular wrench to tighten bolts to the specified torque?
No, a regular wrench cannot provide precise torque control and may result in over- or under-tightening.
Q6 What are the potential consequences of incorrect torque application?
Q6
What are the potential consequences of incorrect torque application?
Incorrect torque can lead to loose components, stripped threads, component failure, and compromised vehicle safety.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature can significantly impact torque values and fastener behavior
Cold Weather
Effects:
- Increased material brittleness
- Higher torque required due to thread contraction
- Reduced thread lubricant effectiveness
Recommendations:
- Allow components to warm to room temperature when possible
- Consider using winter-grade thread lubricants
- Check torque values more frequently during winter months
Hot Weather
Effects:
- Thermal expansion of components
- Decreased friction in threads
- Accelerated lubricant breakdown
Recommendations:
- Check torque when components are at normal operating temperature
- Use temperature-resistant thread lockers
- Consider re-torquing after heat cycles
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Moisture and corrosion can affect fastener integrity and torque values
High Humidity
Effects:
- Accelerated corrosion formation
- Reduced friction coefficient
- Potential thread seizing
Prevention:
- Use corrosion-resistant fasteners
- Apply appropriate anti-seize compounds
- Maintain proper protective coatings
Salt Exposure
Effects:
- Rapid corrosion development
- Thread damage
- Seized fasteners
Prevention:
- Regular underbody washing
- Use of sacrificial anodes where appropriate
- Application of protective coatings
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Spring
- Inspect for winter damage
- Clean and protect exposed fasteners
- Check torque on critical components
Summer
- Monitor heat-affected components
- Check expansion-related loosening
- Inspect cooling system mounts
Fall
- Prepare for winter conditions
- Apply corrosion protection
- Verify all fasteners are properly torqued
Winter
- More frequent inspection of critical fasteners
- Check for salt damage
- Monitor suspension component torque
Related Resources
Tools, service procedures, and technical bulletins
Recommended Tools
Digital Torque Wrench (10-100 Nm)
Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the S3.
- Digital display for accurate readings
- Audible alarm when target torque IS reached
- Multiple units (Nm, ft-lb, in-lb)
- Reversible ratcheting mechanism
Service Procedures
Bolt Torque Specifications for 1999-2003 Audi S3
Comprehensive technical procedure for tightening bolts to specified torques in the Audi S3.
- Locate the desired bolt or component in the vehicle.
- Refer to the torque specification table provided below.
- Set the digital torque wrench to the specified torque value.
- Tighten the bolt using the torque wrench until the audible alarm sounds or the wrench clicks.
- Double-check the tightness of the bolt using the torque wrench.
- Proceed to tighten other bolts or components as necessary.
Technical Service Bulletins
Tsb: Updated Torque Specifications for 1999-2003 Audi S3
2002-05-15This technical bulletin provides updated torque specifications for the 1999-2003 Audi S3, due to an engineering design change. It IS important to follow these updated specifications to ensure proper assembly and performance.
1999-2003 S3
Resolution: Refer to the updated torque specification table attached to this bulletin and follow the service procedure outlined in the above service procedure.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
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