Audi Audi A3 2013-2020 2.0L Engine Bolt Torque Specifications & Fastener Values
Audi Audi A3 2013-2020

Audi Audi A3 2013-2020 2.0L Engine Bolt Torque Specifications

This page provides detailed torque specifications for various bolts on the 2.0L engine found in the 2013-2020 Audi A3 (8V) model. Includes cylinder head, main bearing, connecting rod, and other critical engine component bolt torques.

Updated

Important Information

Safety guidelines and reference information for proper torque application

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

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

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

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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.0l-engine Cylinder Head

Torque specifications for the cylinder head and related components.

1

Cylinder Head Bolts

M10 x 1.5
Important Notes
These bolts require a multi-step torque sequence. Final angle torque may vary. Refer to service manual for exact angle specifications and sequence. Estimated bolt size.
2

Valve Cover Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure valve cover gasket is properly seated. Estimated bolt size.
3

Camshaft Bearing Cap Bolts

M8 x 1.25
Important Notes
These bolts may require angle torque. Ensure proper camshaft alignment. Estimated bolt size and angle.
4

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure rocker arms or shafts are properly positioned. Estimated bolt size.
5

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Tighten bolts in a criss-cross pattern from the center out to prevent leaks. Estimated bolt size.
6

Spark Plugs

M14 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure spark plug threads are clean and free of debris. Use a torque wrench. Estimated bolt size.

2.0l-engine Block

Torque specifications for engine block components.

1

Main Bearing Bolts

M10 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure proper main bearing alignment. Tighten to torque specification in multiple stages, starting at a lower torque, and working to the final specification. Estimated bolt size.
2

Connecting Rod Nuts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure connecting rod caps are correctly aligned. Estimated bolt size.
3

Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure the oil pan gasket is properly seated. Tighten bolts in a criss-cross pattern. Estimated bolt size.
4

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the timing belt/chain tensioner is properly positioned. Estimated bolt size.
5

Engine Mount Bolts to Engine Block

M12 x 1.75
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Ensure mounts are correctly aligned before tightening. Estimated bolt size.
6

Knock Sensor Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Do not overtighten, as this can damage the sensor. Estimated bolt size.
7

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure proper sensor alignment. Estimated bolt size.
8

Oil Pressure Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure proper sensor alignment and sealing. Estimated bolt size.
9

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure housing is correctly aligned with new gasket before tightening. Estimated bolt size.
10

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Use a new sealing washer to prevent leaks. Estimated bolt size.
Page 1 of 2

2.0l-engine Intake Manifold

Torque specifications for the intake manifold and related components.

1

Intake Manifold Bolts

M8 x 1.25
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensure proper alignment with the cylinder head and use a new gasket. Tighten in a criss-cross pattern to prevent leaks. Estimated bolt size.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure a proper seal between throttle body and intake manifold. Estimated bolt size.
3

EGR Valve Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure proper EGR valve alignment. Use a new gasket if required. Estimated bolt size.
4

Fuel Rail Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment with fuel injectors. Estimated bolt size.
5

Fuel Injector Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure fuel injectors are properly seated and sealed. Estimated bolt size.

2.0l-engine Timing And Accessories

Torque specifications for timing and accessory drive components.

1

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper camshaft timing and sprocket alignment. Estimated bolt size.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Ensure proper pulley alignment. Use a crankshaft holding tool. Estimated bolt size.
3

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure pulley is correctly positioned. Estimated bolt size.
4

Thermostat Housing Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Use a new gasket or sealant. Estimated bolt size.
5

Serpentine/Accessory Drive Belt Tensioner Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper belt tensioner alignment. Estimated bolt size.
6

Drive Belt Idler Pulley Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure idler pulley is properly aligned. Estimated bolt size.
7

Coolant Temperature Sensor Bolt/Fitting

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Use a new sealing washer. Estimated bolt size.

2.0l-engine Electrical

Torque specifications for electrical components.

1

Ignition Coil Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure ignition coil is properly seated. Estimated bolt size.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

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

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

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

Why are correct torque specifications important when working on the 2.0L engine?

Using the correct torque specifications ensures that fasteners are tightened to the proper tension. Under-tightening can lead to leaks, component failure, and loosening, while over-tightening can damage threads, warp components, and cause fastener failure. For example, over-tightening a cylinder head bolt can warp the head, leading to expensive repairs. Following the specified torque avoids such problems and ensures a secure and reliable assembly.

Q2

Should I use new bolts when working on the engine, and why?

For many critical components like cylinder head bolts or connecting rod bolts, new bolts are strongly recommended and often required. These bolts are often 'torque-to-yield,' meaning they stretch slightly upon tightening to achieve the desired clamping force. Reusing them can lead to inconsistent clamping, improper sealing, and possible failure. For example, reusing old head bolts after removing the cylinder head can lead to a blown head gasket. Always follow the manufacturer's recommendations.

Q3

What type of torque wrench should I use?

A calibrated torque wrench is essential for accurate torque application. A click-type or beam-type torque wrench is suitable for most applications, but a digital torque wrench offers the best accuracy. Ensure the wrench's range covers the required torque specifications and that it is in good working order. Using a properly maintained and calibrated wrench is critical to achieving proper tightness. For example, using a worn or uncalibrated torque wrench could lead to under or over tightening.

Q4

What is the difference between dry torque and oiled torque specifications?

Some torque specifications are meant to be applied to dry threads, while others require lubrication. Applying lubricant where a dry torque is specified can lead to over-tightening because the lubricated threads reduce friction and require less force to achieve the same clamping force. Always consult the specific torque specification and follow instructions on the use of lubrication when using bolts. This prevents damage due to excess clamping force. For example, If you apply oil to bolts specified for a dry installation, you could damage the component threads.

Q5

Where can I find the correct torque specifications for my 2013-2020 Audi A3 2.0L engine?

The most reliable source for torque specifications is the official repair manual for your specific model year. These manuals are often available in print or digitally, and they provide a complete reference guide with detailed diagrams. You may also find some specifications online but always verify the information with a trusted repair manual. Using the correct manual ensures the best possible results.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

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

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

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

Torque Wrench (1/2" Drive)

A calibrated torque wrench with a 1/2" drive is essential for applying accurate torque values to fasteners. Range should cover the specified torque values for the 2.0L engine.

  • Click-type mechanism for accurate torque application
  • Clear torque scale in Nm and lb-ft
Learn more

Torque Wrench (3/8" Drive)

A smaller 3/8" drive torque wrench for lower torque fasteners and those in tighter spaces.

  • Compact design
  • Click-type mechanism for accurate torque application
Learn more

Socket Set (Metric)

A complete set of metric sockets, including shallow and deep variations, in both 1/2" and 3/8" drive sizes. Specifically include sizes relevant to 2.0L engine fasteners. Common sizes include 10mm, 13mm, 16mm, 18mm, and 21mm.

  • High-quality chrome vanadium steel
  • Comprehensive range of metric sizes
Learn more

Extension Bars

Extension bars for 1/2" and 3/8" drive, to reach difficult to access bolts.

  • Various lengths for increased reach
  • Durable construction
Learn more

Universal Joint (U-Joint)

A universal joint for 1/2" or 3/8" drive to access bolts at an angle.

  • Swivels to access hard-to-reach fasteners
  • Durable construction
Learn more

Torque Angle Meter

An angle meter is needed when torque-plus-angle tightening procedures are required. Can be a digital or mechanical design.

  • Accurately measures the angle of rotation after torque application.
  • Essential for many engine fasteners.
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure (2.0L)

Detailed procedure for correctly tightening cylinder head bolts on a 2.0L engine.

  • Ensure all mating surfaces are clean and free of debris.
  • Install new cylinder head bolts.
  • Tighten all bolts to the initial torque specification in the correct sequence. (Refer to repair manual)
  • Tighten all bolts to the second torque specification in the correct sequence. (Refer to repair manual)
  • Using a torque angle meter, tighten all bolts to the specified angle in the correct sequence. (Refer to repair manual)
View full procedure

Main Bearing Cap Bolt Tightening Procedure (2.0L)

Detailed procedure for correctly tightening main bearing cap bolts on a 2.0L engine.

  • Ensure all mating surfaces are clean and free of debris.
  • Install main bearing caps and new bolts.
  • Tighten all bolts to the initial torque specification in the correct sequence. (Refer to repair manual)
  • Tighten all bolts to the second torque specification in the correct sequence. (Refer to repair manual)
  • Using a torque angle meter, tighten all bolts to the specified angle in the correct sequence. (Refer to repair manual)
View full procedure

Connecting Rod Cap Bolt Tightening Procedure (2.0L)

Detailed procedure for correctly tightening connecting rod cap bolts on a 2.0L engine.

  • Ensure all mating surfaces are clean and free of debris.
  • Install connecting rod caps and new bolts.
  • Tighten all bolts to the initial torque specification in the correct sequence. (Refer to repair manual)
  • Tighten all bolts to the second torque specification in the correct sequence. (Refer to repair manual)
  • Using a torque angle meter, tighten all bolts to the specified angle in the correct sequence. (Refer to repair manual)
View full procedure

Intake Manifold Bolt Tightening Procedure (2.0L)

Detailed procedure for correctly tightening the intake manifold bolts on a 2.0L engine.

  • Place intake manifold on cylinder head.
  • Install bolts by hand.
  • Tighten bolts to the specified torque in the correct sequence. (Refer to repair manual)
View full procedure

Exhaust Manifold Bolt Tightening Procedure (2.0L)

Detailed procedure for correctly tightening the exhaust manifold bolts on a 2.0L engine.

  • Place exhaust manifold on cylinder head.
  • Install bolts by hand.
  • Tighten bolts to the specified torque in the correct sequence. (Refer to repair manual)
View full procedure
Technical Service Bulletins

Cylinder Head Bolt Stretch - Incorrect Tightening

2015-06-15

Some vehicles have reported cylinder head bolt stretching and failures due to incorrect tightening procedure. Always ensure to use new bolts and torque to the correct specifications.

2013-2016

Resolution: Follow the proper tightening sequence, use new bolts, and a calibrated torque wrench. Adhere to both torque and angle tightening procedure.

Oil Pan Bolt Breakage - Improper Torquing

2017-03-20

Reports of oil pan bolts breaking during reassembly. Due to the aluminum oil pan, bolts should be torqued properly to prevent damage and failure.

2013-2018

Resolution: Use new bolts and torque to the exact specifications as outlined in the service manual.

Connecting Rod Bolt Failure

2018-12-01

Instances of connecting rod bolt failure reported due to improper assembly. Follow torque procedure and always use new bolts.

2016-2020

Resolution: Replace connecting rod bolts with new bolts every time. Adhere to the recommended torque and angle tightening procedures.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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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.
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