Audi Vehicle Models Audi A4 2017-present Torque Specifications
Complete Audi Vehicle Models Audi A4 2017-present 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.
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
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.
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.
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
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.
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.
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Torque Wrench (3/8" Drive)
Torque Wrench (1/2" Drive)
Angle Gauge
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
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Torque Calculator
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2.0l Engine
Torque specifications for 2.0L Engine
2.0l Engine
Torque specifications for 2.0L Engine
2.0l Engine Cylinder Head
1 Cylinder Head Bolts
M12 x 1.75
Cylinder Head Bolts
M12 x 1.75 2 Valve Cover Bolts
M6 x 1.0
Valve Cover Bolts
M6 x 1.0 3 Rocker Arms/Shafts Bolts
M8 x 1.25
Rocker Arms/Shafts Bolts
M8 x 1.25 4 Camshaft Bearing Cap Bolts
M6 x 1.0
Camshaft Bearing Cap Bolts
M6 x 1.0 5 Camshaft Sprocket Bolts
M10 x 1.5
Camshaft Sprocket Bolts
M10 x 1.5 6 Spark Plugs
M14 x 1.25
Spark Plugs
M14 x 1.25 7 Ignition Coil Bolts
M6 x 1.0
Ignition Coil Bolts
M6 x 1.0 8 Cylinder Head Cover Bolts
M6 x 1.0
Cylinder Head Cover Bolts
M6 x 1.02.0l Engine Block
1 Main Bearing Bolts
M10 x 1.5
Main Bearing Bolts
M10 x 1.5 2 Connecting Rod Nuts
M9 x 1.25
Connecting Rod Nuts
M9 x 1.25 3 Oil Pan Bolts
M6 x 1.0
Oil Pan Bolts
M6 x 1.0 4 Water Pump Bolts
M8 x 1.25
Water Pump Bolts
M8 x 1.25 5 Oil Drain Plug
M14 x 1.5
Oil Drain Plug
M14 x 1.52.0l Engine Intake
1 Intake Manifold Bolts
M8 x 1.25
Intake Manifold Bolts
M8 x 1.25 2 Throttle Body Bolts
M6 x 1.0
Throttle Body Bolts
M6 x 1.0 3 Fuel Rail Bolts
M6 x 1.0
Fuel Rail Bolts
M6 x 1.0 4 Fuel Injector Bolts
M6 x 1.0
Fuel Injector Bolts
M6 x 1.0 5 PCV Valve/Hose Connections
Estimated M5 x 0.8
PCV Valve/Hose Connections
Estimated M5 x 0.8 6 EGR Valve Bolts
M6 x 1.0
EGR Valve Bolts
M6 x 1.02.0l Engine Exhaust
1 Exhaust Manifold/Headers Bolts
M8 x 1.25
Exhaust Manifold/Headers Bolts
M8 x 1.25 2 Turbocharger Mounting Bolts
M10 x 1.5
Turbocharger Mounting Bolts
M10 x 1.5 3 Turbocharger Oil Line Bolts
M8 x 1.25
Turbocharger Oil Line Bolts
M8 x 1.252.0l Engine Timing
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Timing Belt/Chain Tensioner Bolt
M8 x 1.252.0l Engine Accessories
1 Crankshaft Pulley/Harmonic Balancer Bolt
M14 x 1.5
Crankshaft Pulley/Harmonic Balancer Bolt
M14 x 1.5 2 Water Pump Pulley Bolts
M6 x 1.0
Water Pump Pulley Bolts
M6 x 1.0 3 Thermostat Housing Bolts
M6 x 1.0
Thermostat Housing Bolts
M6 x 1.0 4 Serpentine/Accessory Drive Belt Tensioner Bolt
M10 x 1.5
Serpentine/Accessory Drive Belt Tensioner Bolt
M10 x 1.5 5 Drive Belt Idler Pulley Bolt
M10 x 1.5
Drive Belt Idler Pulley Bolt
M10 x 1.5 6 Engine Mount Bolts (Engine Side)
M12 x 1.75
Engine Mount Bolts (Engine Side)
M12 x 1.75 7 Flywheel Bolts
M10 x 1.5
Flywheel Bolts
M10 x 1.5 3.0l Engine
Torque specifications for 3.0L Engine
3.0l Engine
Torque specifications for 3.0L Engine
3.0l Engine Cylinder Head
1 Cylinder Head Bolts
M12 x 1.75 (Estimated)
Cylinder Head Bolts
M12 x 1.75 (Estimated) 2 Rocker Arms/Shafts Bolts
M8 x 1.25
Rocker Arms/Shafts Bolts
M8 x 1.25 3 Valve Cover Bolts
M6 x 1.0
Valve Cover Bolts
M6 x 1.0 4 Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.253.0l Engine Block
1 Main Bearing Bolts
M12 x 1.75 (Estimated)
Main Bearing Bolts
M12 x 1.75 (Estimated) 2 Connecting Rod Nuts
M9 x 1.25 (Estimated)
Connecting Rod Nuts
M9 x 1.25 (Estimated) 3 Oil Pan Bolts
M6 x 1.0
Oil Pan Bolts
M6 x 1.0 4 Water Pump Bolts
M8 x 1.25
Water Pump Bolts
M8 x 1.25 5 Oil Drain Plug Bolt
M14 x 1.5
Oil Drain Plug Bolt
M14 x 1.53.0l Engine Intake Manifold
1 Intake Manifold Bolts
M8 x 1.25
Intake Manifold Bolts
M8 x 1.25 2 Throttle Body Bolts
M6 x 1.0
Throttle Body Bolts
M6 x 1.0 3 EGR Valve Bolts
M6 x 1.0
EGR Valve Bolts
M6 x 1.0 4 Fuel Rail Bolts
M6 x 1.0
Fuel Rail Bolts
M6 x 1.0 5 Fuel Injector Rail Bolts
M6 x 1.0
Fuel Injector Rail Bolts
M6 x 1.0 6 Fuel Injector Bolts
M6 x 1.0
Fuel Injector Bolts
M6 x 1.03.0l Engine Timing
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Timing Belt/Chain Tensioner Bolt
M8 x 1.25 2 Camshaft Sprocket Bolt
M10 x 1.5
Camshaft Sprocket Bolt
M10 x 1.53.0l Engine Accessory Drive
1 Crankshaft Pulley/Harmonic Balancer Bolt
M14 x 1.5 (Estimated)
Crankshaft Pulley/Harmonic Balancer Bolt
M14 x 1.5 (Estimated) 2 Water Pump Pulley Bolts
M6 x 1.0
Water Pump Pulley Bolts
M6 x 1.0 3 Serpentine/Accessory Drive Belt Tensioner Bolt
M8 x 1.25
Serpentine/Accessory Drive Belt Tensioner Bolt
M8 x 1.25 4 Drive Belt Idler Pulley Bolt
M8 x 1.25
Drive Belt Idler Pulley Bolt
M8 x 1.253.0l Engine Cooling
1 Thermostat Housing Bolts
M6 x 1.0
Thermostat Housing Bolts
M6 x 1.03.0l Engine Ignition
1 Spark Plugs
M14 x 1.25 (Estimated)
Spark Plugs
M14 x 1.25 (Estimated) 2 Ignition Coil Bolt
M6 x 1.0
Ignition Coil Bolt
M6 x 1.0 Body
Torque specifications for Body
Body
Torque specifications for Body
Body Fuel System
1 Fuel Tank Strap Bolts
M8 x 1.25
Fuel Tank Strap Bolts
M8 x 1.25 2 Fuel Filler Neck Bolts
M6 x 1.0
Fuel Filler Neck Bolts
M6 x 1.0 3 Fuel Pump Mounting Bolts
M6 x 1.0
Fuel Pump Mounting Bolts
M6 x 1.0Body Doors
1 Door Hinge Bolts (to body)
M8 x 1.25
Door Hinge Bolts (to body)
M8 x 1.25Body Exterior Panels
1 Fender Bolts (to body)
M6 x 1.0
Fender Bolts (to body)
M6 x 1.0 2 Hood Hinge Bolts (to body)
M8 x 1.25
Hood Hinge Bolts (to body)
M8 x 1.25 3 Bumper Cover Mounting Bolts/Screws
Various
Bumper Cover Mounting Bolts/Screws
Various 4 Tail Light Assembly Bolts
M6 x 1.0
Tail Light Assembly Bolts
M6 x 1.0Body Interior
1 Seat Mounting Bolts
M10 x 1.5
Seat Mounting Bolts
M10 x 1.5 2 Interior Trim Panel Screws/Bolts
Various
Interior Trim Panel Screws/Bolts
Various Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Brake Calipers
1 Brake Caliper Bolts
M12 x 1.75 (estimated)
Brake Caliper Bolts
M12 x 1.75 (estimated) 2 Brake Caliper Mounting Bracket Bolts
M14 x 1.5 (estimated)
Brake Caliper Mounting Bracket Bolts
M14 x 1.5 (estimated) 3 Brake Caliper Bleeder Screw
M10 x 1.0 (estimated)
Brake Caliper Bleeder Screw
M10 x 1.0 (estimated) 4 Brake Line Fittings
M10 x 1.0 (estimated)
Brake Line Fittings
M10 x 1.0 (estimated) 5 Brake Pad Retaining Pins/Bolts
M6 x 1.0 (estimated)
Brake Pad Retaining Pins/Bolts
M6 x 1.0 (estimated)Brake Discs Drums
1 Brake Disc/Drum Retaining Bolts
M8 x 1.25 (estimated)
Brake Disc/Drum Retaining Bolts
M8 x 1.25 (estimated)Wheel Mounting
1 Wheel Lug Nuts
M12 x 1.5 (estimated)
Wheel Lug Nuts
M12 x 1.5 (estimated)Abs System
1 ABS Sensor Bolt
M6 x 1.0 (estimated)
ABS Sensor Bolt
M6 x 1.0 (estimated)Master Cylinder
1 Brake Master Cylinder Mounting Bolts
M8 x 1.25 (estimated)
Brake Master Cylinder Mounting Bolts
M8 x 1.25 (estimated) Dl382 Transmission
Torque specifications for Dl382 Transmission
Dl382 Transmission
Torque specifications for Dl382 Transmission
Dl382 Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.75 (Estimated)
Transmission Mounting Bolts
M12 x 1.75 (Estimated)Dl382 Transmission Case
1 Transmission Housing Bolts (Case Bolts)
M10 x 1.5 (Estimated)
Transmission Housing Bolts (Case Bolts)
M10 x 1.5 (Estimated) 2 Clutch Housing to Transmission Case Bolts
M8 x 1.25 (Estimated)
Clutch Housing to Transmission Case Bolts
M8 x 1.25 (Estimated)Dl382 Transmission Oil Pan
1 Transmission Oil Pan Bolts
M6 x 1.0
Transmission Oil Pan Bolts
M6 x 1.0 2 Transmission Drain and Fill Plugs
M18 x 1.5 (Estimated)
Transmission Drain and Fill Plugs
M18 x 1.5 (Estimated) 3 Transmission Fluid Drain/Fill Plug
M22 x 1.5 (Estimated)
Transmission Fluid Drain/Fill Plug
M22 x 1.5 (Estimated)Dl382 Transmission Mechatronics
1 Mechatronics Unit Mounting Bolts (Larger)
M6 x 1.0
Mechatronics Unit Mounting Bolts (Larger)
M6 x 1.0 2 Mechatronics Unit Mounting Bolts (Smaller)
M5 x 0.8 (Estimated)
Mechatronics Unit Mounting Bolts (Smaller)
M5 x 0.8 (Estimated)Dl382 Transmission Dual Clutch
1 Dual Clutch Unit Mounting Bolts
M6 x 1.0 (Estimated)
Dual Clutch Unit Mounting Bolts
M6 x 1.0 (Estimated)Dl382 Transmission Sensors
1 Input/Output Shaft Sensor Bolts
M5 x 0.8 (Estimated)
Input/Output Shaft Sensor Bolts
M5 x 0.8 (Estimated)Dl382 Transmission Park Pawl
1 Park Pawl Actuator Bolt(s)
M8 x 1.25 (Estimated)
Park Pawl Actuator Bolt(s)
M8 x 1.25 (Estimated)Dl382 Transmission Axle
1 Drive Axle/Half Shaft Bolts
M10 x 1.5 (Estimated)
Drive Axle/Half Shaft Bolts
M10 x 1.5 (Estimated) 2 CV Joint/Axle Nut
M24 x 1.5 (Estimated)
CV Joint/Axle Nut
M24 x 1.5 (Estimated) Dq200 Transmission
Torque specifications for Dq200 Transmission
Dq200 Transmission
Torque specifications for Dq200 Transmission
Dq200 Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.75
Transmission Mounting Bolts
M12 x 1.75Dq200 Transmission Case
1 Transmission Oil Pan Bolts
M6 x 1.0
Transmission Oil Pan Bolts
M6 x 1.0 2 Transmission Fluid Drain Plug (Plastic)
Proprietary Plastic Thread
Transmission Fluid Drain Plug (Plastic)
Proprietary Plastic Thread 3 Transmission Fluid Fill Plug (Plastic)
Proprietary Plastic Thread
Transmission Fluid Fill Plug (Plastic)
Proprietary Plastic Thread 4 Transmission Fluid Drain Plug (Metal)
M16 x 1.5
Transmission Fluid Drain Plug (Metal)
M16 x 1.5 5 Transmission Fluid Fill Plug (Metal)
M16 x 1.5
Transmission Fluid Fill Plug (Metal)
M16 x 1.5 6 Mechatronics Unit Mounting Bolts
M6 x 1.0
Mechatronics Unit Mounting Bolts
M6 x 1.0 7 Clutch Housing Bolts
M8 x 1.25
Clutch Housing Bolts
M8 x 1.25Dq200 Internal Components
1 Shift Fork Bolts
M6 x 1.0
Shift Fork Bolts
M6 x 1.0 2 Input Shaft Speed Sensor Bolt
M5 x 0.8
Input Shaft Speed Sensor Bolt
M5 x 0.8 3 Output Shaft Speed Sensor Bolt
M5 x 0.8
Output Shaft Speed Sensor Bolt
M5 x 0.8Dq200 Driveline
1 Drive Axle/Half Shaft Bolts
M10 x 1.5
Drive Axle/Half Shaft Bolts
M10 x 1.5 2 CV Joint/Axle Nut
Varies, typically M24 x 1.5
CV Joint/Axle Nut
Varies, typically M24 x 1.5 Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Drivetrain Flywheel
1 Flywheel Bolts
M12 x 1.25
Flywheel Bolts
M12 x 1.25Drivetrain Transmission
1 Transmission Mounting Bolts
M12 x 1.75
Transmission Mounting Bolts
M12 x 1.75 2 Transmission to Engine Bolts
M12 x 1.75
Transmission to Engine Bolts
M12 x 1.75 3 Transmission Oil Pan Bolts
M8 x 1.25
Transmission Oil Pan Bolts
M8 x 1.25 4 Transmission Fluid Drain and Fill Plugs
M18 x 1.5
Transmission Fluid Drain and Fill Plugs
M18 x 1.5 5 Transmission Fluid Drain/Fill Plug (Separate)
M18 x 1.5
Transmission Fluid Drain/Fill Plug (Separate)
M18 x 1.5Drivetrain Axles
1 Drive Axle/Half Shaft Bolts
M10 x 1.5
Drive Axle/Half Shaft Bolts
M10 x 1.5 2 CV Joint/Axle Nut
M24 x 2.0
CV Joint/Axle Nut
M24 x 2.0Drivetrain Driveshaft
1 Propeller/Drive Shaft Bolts
M10 x 1.25
Propeller/Drive Shaft Bolts
M10 x 1.25 2 Driveshaft Center Support Bearing Bolts
M8 x 1.25
Driveshaft Center Support Bearing Bolts
M8 x 1.25Drivetrain Differential
1 Differential Mounting Bolts
M14 x 1.5
Differential Mounting Bolts
M14 x 1.5 2 Differential Drain/Fill Plug
M18 x 1.5
Differential Drain/Fill Plug
M18 x 1.5Drivetrain Transfer Case
1 Transfer Case Mounting Bolts
M14 x 1.5
Transfer Case Mounting Bolts
M14 x 1.5 2 Transfer Case Drain/Fill Plug
M18 x 1.5
Transfer Case Drain/Fill Plug
M18 x 1.5 Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Electrical System Ignition
1 Ignition Coil Bolt
M6 x 1.0
Ignition Coil Bolt
M6 x 1.0Electrical System Starting
1 Starter Motor Mounting Bolts
M10 x 1.5
Starter Motor Mounting Bolts
M10 x 1.5Electrical System Charging
1 Alternator Mounting Bolts
M10 x 1.5
Alternator Mounting Bolts
M10 x 1.5Electrical System Battery
1 Battery Terminal Nuts
M8 x 1.25
Battery Terminal Nuts
M8 x 1.25Electrical System Ecm
1 Engine Control Unit (ECU) Mounting Bolts
M6 x 1.0
Engine Control Unit (ECU) Mounting Bolts
M6 x 1.0Electrical System Grounding
1 Ground Cable Mounting Bolts (Body/Chassis Ground Points)
M10 x 1.5
Ground Cable Mounting Bolts (Body/Chassis Ground Points)
M10 x 1.5Electrical System Power Distribution
1 Fuse Box/Relay Box Mounting Bolts
M6 x 1.0
Fuse Box/Relay Box Mounting Bolts
M6 x 1.0Electrical System Abs
1 ABS Module Mounting Bolts
M6 x 1.0
ABS Module Mounting Bolts
M6 x 1.0 2 Vehicle Speed Sensor Mounting Bolt
M6 x 1.0
Vehicle Speed Sensor Mounting Bolt
M6 x 1.0 Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
3.0l Engine Cylinder Head
1 Exhaust Manifold to Cylinder Head Bolts
M8 x 1.25
Exhaust Manifold to Cylinder Head Bolts
M8 x 1.253.0l Engine Exhaust System
1 EGR Valve Mounting Bolts
M8 x 1.25
EGR Valve Mounting Bolts
M8 x 1.25 2 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5 3 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5 4 Oxygen Sensor (O2 Sensor)
M18 x 1.5
Oxygen Sensor (O2 Sensor)
M18 x 1.5 5 NOx Sensor Mounting Bolts
M6 x 1.0
NOx Sensor Mounting Bolts
M6 x 1.0 6 Exhaust Gas Temperature (EGT) Sensor
M14 x 1.5
Exhaust Gas Temperature (EGT) Sensor
M14 x 1.53.0l Engine Intake System
1 Mass Air Flow (MAF) Sensor Mounting Bolts
M5 x 0.8
Mass Air Flow (MAF) Sensor Mounting Bolts
M5 x 0.83.0l Engine Dpf System
1 Differential Pressure Sensor Mounting Bolts/Nuts
M6 x 1.0
Differential Pressure Sensor Mounting Bolts/Nuts
M6 x 1.0 Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold
1 Exhaust Manifold/Header to Cylinder Head Bolts
M8 x 1.25
Exhaust Manifold/Header to Cylinder Head Bolts
M8 x 1.25 2 Exhaust Pipe to Exhaust Manifold/Header Bolts
M10 x 1.5
Exhaust Pipe to Exhaust Manifold/Header Bolts
M10 x 1.5Exhaust System
1 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5 2 Muffler to Exhaust Pipe Bolts
M10 x 1.5
Muffler to Exhaust Pipe Bolts
M10 x 1.5 3 Exhaust Flange Bolts (varies, example)
M8 x 1.25 or V-band clamp (size varies)
Exhaust Flange Bolts (varies, example)
M8 x 1.25 or V-band clamp (size varies)Exhaust Hangers And Sensors
1 Exhaust Hanger Bracket Bolts (Body/Frame)
M8 x 1.25
Exhaust Hanger Bracket Bolts (Body/Frame)
M8 x 1.25 2 Oxygen Sensor
M18 x 1.5 (Typical)
Oxygen Sensor
M18 x 1.5 (Typical) 3 Exhaust Heat Shield Bolts
M6 x 1.0
Exhaust Heat Shield Bolts
M6 x 1.0 Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Fuel Delivery System
1 Fuel Rail Mounting Bolts
M6 x 1.0
Fuel Rail Mounting Bolts
M6 x 1.0 2 Fuel Injector Mounting Bolts
M5 x 0.8
Fuel Injector Mounting Bolts
M5 x 0.8 3 Fuel Filter Mounting Bolt/Nut
M6 x 1.0
Fuel Filter Mounting Bolt/Nut
M6 x 1.0 4 Fuel Line Fittings (Banjo Bolts/Threaded)
M12 x 1.5
Fuel Line Fittings (Banjo Bolts/Threaded)
M12 x 1.5Fuel Pump And Tank
1 Fuel Pump Mounting Bolts
M8 x 1.25
Fuel Pump Mounting Bolts
M8 x 1.25 2 Fuel Tank Strap Bolts
M10 x 1.5
Fuel Tank Strap Bolts
M10 x 1.5 3 Fuel Tank Sending Unit/Level Sensor Bolts/Screws
M4 x 0.7
Fuel Tank Sending Unit/Level Sensor Bolts/Screws
M4 x 0.7Fuel Filler System
1 Fuel Filler Neck Bolts
M6 x 1.0
Fuel Filler Neck Bolts
M6 x 1.0High Pressure Fuel System
1 High-Pressure Fuel Pump Mounting Bolts
M8 x 1.25
High-Pressure Fuel Pump Mounting Bolts
M8 x 1.25 Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
Hvac Ac Compressor
1 A/C Compressor Mounting Bolts
M8 x 1.25
A/C Compressor Mounting Bolts
M8 x 1.25 2 A/C Line Fittings
M10 x 1.5
A/C Line Fittings
M10 x 1.5Hvac Condenser
1 A/C Condenser Mounting Bolts/Nuts
M6 x 1.0
A/C Condenser Mounting Bolts/Nuts
M6 x 1.0Hvac Evaporator
1 A/C Evaporator Housing Bolts/Screws
M5 x 0.8
A/C Evaporator Housing Bolts/Screws
M5 x 0.8 2 Expansion Valve Mounting Bolts/Nuts
M6 x 1.0
Expansion Valve Mounting Bolts/Nuts
M6 x 1.0Hvac Blower Motor
1 HVAC Blower Motor Mounting Bolts/Screws
M4 x 0.7
HVAC Blower Motor Mounting Bolts/Screws
M4 x 0.7Hvac Actuators
1 HVAC Blend Door Actuator Bolts/Screws
M4 x 0.7
HVAC Blend Door Actuator Bolts/Screws
M4 x 0.7Hvac Control Module
1 HVAC Control Module Mounting Bolts/Screws
M4 x 0.7
HVAC Control Module Mounting Bolts/Screws
M4 x 0.7 Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Front Suspension
1 Strut/Shock Absorber Upper Mounting Bolts
M10 x 1.5
Strut/Shock Absorber Upper Mounting Bolts
M10 x 1.5 2 Strut/Shock Absorber Lower Mounting Bolts
M12 x 1.5
Strut/Shock Absorber Lower Mounting Bolts
M12 x 1.5 3 Control Arm Bolts (Frame/Subframe)
M14 x 1.5
Control Arm Bolts (Frame/Subframe)
M14 x 1.5 4 Control Arm Bolts (Spindle/Steering Knuckle)
M12 x 1.5
Control Arm Bolts (Spindle/Steering Knuckle)
M12 x 1.5 5 Ball Joint Nut
M12 x 1.25
Ball Joint Nut
M12 x 1.25 6 Tie Rod End Nut
M10 x 1.25
Tie Rod End Nut
M10 x 1.25 7 Sway Bar Link Nut
M8 x 1.25
Sway Bar Link Nut
M8 x 1.25 8 Steering Knuckle to Strut Bolts
M12 x 1.5
Steering Knuckle to Strut Bolts
M12 x 1.5 9 Upper Control Arm to Frame Bolts
M12 x 1.5
Upper Control Arm to Frame Bolts
M12 x 1.5Rear Suspension
1 Rear Trailing Arm Bolts
M14 x 1.5
Rear Trailing Arm Bolts
M14 x 1.5 2 Rear Shock/Strut Lower Mount Bolt
M12 x 1.5
Rear Shock/Strut Lower Mount Bolt
M12 x 1.5Chassis And Subframe
1 Subframe Bolts
M14 x 1.5
Subframe Bolts
M14 x 1.5 2 Sway Bar Bracket Bolts
M8 x 1.25
Sway Bar Bracket Bolts
M8 x 1.25Troubleshooting 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
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
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
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 value for the wheel lug bolts on a 2017-Present Audi A4?
What IS the recommended torque value for the wheel lug bolts on a 2017-Present Audi A4?
129 ft-lbs (175 Nm) for steel wheels and 148 ft-lbs (200 Nm) for alloy wheels.
Q2 What type of torque wrench IS most suitable for tightening bolts on an Audi A4?
What type of torque wrench IS most suitable for tightening bolts on an Audi A4?
A click-type torque wrench calibrated to metric measurements IS recommended for accurate and consistent tightening.
Q3 IS it acceptable to use an impact wrench to tighten bolts on an Audi A4?
IS it acceptable to use an impact wrench to tighten bolts on an Audi A4?
No, impact wrenches should not be used as they can overtighten bolts and damage threads.
Q4 What are the potential consequences of overtightening bolts on an Audi A4?
What are the potential consequences of overtightening bolts on an Audi A4?
Overtightening bolts can damage threads, strip bolt heads, and potentially cause component failure.
Q5 How often should torque specifications be checked on an Audi A4?
How often should torque specifications be checked on an Audi A4?
Torque specifications should be checked and verified at every service interval or according to the manufacturer's recommended schedule.
Q6 Where can I find additional torque specifications for my Audi A4?
Where can I find additional torque specifications for my Audi A4?
Refer to the Audi workshop manual or consult with an authorized Audi dealership for specific torque specifications for different components.
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 A4.
- Digital display for accurate readings
- Audible alarm when target torque IS reached
- Multiple units (Nm, ft-lb, in-lb)
- Reversible ratcheting mechanism
Service Procedures
Engine Component Torque Specifications
Technical procedure overview for Audi A4 engine component torque specifications
- Locate the specific engine component you are working on.
- Refer to the torque specifications table below.
- Tighten the fastener to the specified torque value using a digital torque wrench.
Suspension Component Torque Specifications
Technical procedure overview for Audi A4 suspension component torque specifications
- Locate the specific suspension component you are working on.
- Refer to the torque specifications table below.
- Tighten the fastener to the specified torque value using a digital torque wrench.
Brake Component Torque Specifications
Technical procedure overview for Audi A4 brake component torque specifications
- Locate the specific brake component you are working on.
- Refer to the torque specifications table below.
- Tighten the fastener to the specified torque value using a digital torque wrench.
Technical Service Bulletins
Technical Service Bulletin: Incorrect Torque Values for Engine Mount Bolts
2018-03-15This bulletin addresses incorrect torque values provided in the service manual for the engine mount bolts on 2017-2018 Audi A4 models. The corrected torque values are provided in the resolution section below.
Resolution: The engine mount bolts should be tightened to 45 Nm (33 ft-lb) plus an additional 90 degrees.
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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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- If you're unsure about any procedure, consult a qualified professional mechanic.
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