Audi Audi S3 2013-present 2.0L Engine Bolt Torque Specifications & Fastener Values
Audi Audi S3 2013-present

Audi Audi S3 2013-present 2.0L Engine Bolt Torque Specifications

Detailed torque specifications for various bolts on the 2.0L engine in the 2013-present Audi S3, including cylinder head, main bearing cap, and connecting rod bolts.

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

Engine Block And Internals

Torque specifications for components related to the engine block, crankshaft, and internal moving parts.

1

Cylinder Head Bolts (Initial Stage)

M12
Important Notes
Tighten in sequence starting from the center and spiraling outwards. Use new bolts. Stage 1 is torque, Stage 2 and 3 are angles.
2

Main Bearing Cap Bolts

M10
Important Notes
Tighten in sequence from the center outward. Use new bolts. Stage 1 is torque, Stage 2 is angle.
3

Connecting Rod Cap Bolts

M9
Important Notes
Use new stretch bolts. Stage 1 is torque, Stage 2 is angle.
4

Oil Pan Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern to avoid distortion. Be careful not to over-tighten.
5

Oil Pump Bolts

M6 / M8
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Use 10 N·m (7 ft-lbs) for M6 bolts and 25 N·m (18 ft-lbs) for M8 bolts, if mixed.

Cylinder Head And Valvetrain

Specifications for components related to the cylinder head, camshafts, and valve train.

1

Camshaft Bearing Cap Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a sequence starting from the center outwards, in alternating fashion.
2

Camshaft Adjuster Bolts

M8
Important Notes
Stage 1 is torque, stage 2 is angle. Tighten evenly.
3

Valve Cover Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern. Be careful not to over-tighten. These go into aluminum and can easily strip.

Intake And Exhaust System

Torque specifications for components in the intake and exhaust systems.

1

Intake Manifold Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a sequence from the center outwards, in alternating fashion.
2

Exhaust Manifold/Turbocharger Bolts

M8 / M10
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Use 25 N·m (18 ft-lbs) for M8 bolts and 40 N·m (30 ft-lbs) for M10 bolts, if mixed. Tighten evenly.
3

Turbocharger Oil Inlet/Outlet Line Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Tighten carefully. Ensure the sealing washers are correctly placed.
4

Downpipe/Exhaust System Flange Bolts

M8 / M10
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Use 25 N·m (18 ft-lbs) for M8 bolts and 40 N·m (30 ft-lbs) for M10 bolts, if mixed. Tighten evenly.

Cooling System

Torque specifications for components within the engine's cooling system.

1

Water Pump Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure. Be careful not to over-tighten.
2

Thermostat Housing Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern. Be careful not to over-tighten the plastic housing.

Engine Accessories

Torque specifications for engine accessories such as the alternator, starter, and A/C compressor.

1

Alternator Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly. Make sure the alternator is seated properly before tightening.
2

Starter Motor Bolts

M10
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Tighten evenly. Ensure the starter motor is flush against the engine block.
3

A/C Compressor Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly. Make sure the compressor is aligned before tightening.
4

Crankshaft Pulley Bolt

M18
Important Notes
Use a new bolt. Stage 1 is torque, stage 2 is angle. Support the crankshaft while tightening

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 torque specifications important?

Using the correct torque specifications is crucial for ensuring proper clamping force and preventing damage to engine components. Over-tightening can strip threads or crack parts, while under-tightening can lead to leaks, vibration, or component failure. For instance, improperly torqued cylinder head bolts can lead to head gasket failure.

Q2

Do I need to replace bolts when removing them?

Some bolts, particularly those used for critical engine components like the cylinder head or connecting rods, are considered 'torque-to-yield' (TTY) bolts. These bolts stretch upon tightening and should always be replaced after removal. Reusing TTY bolts can lead to inaccurate clamping force and potential failure. Always check the specific component recommendations.

Q3

What tools do I need for proper torque application?

A calibrated torque wrench is essential for accurately applying torque. It's also crucial to use the correct socket size to avoid damaging bolt heads. Furthermore, an angle gauge might be required for torque-angle tightening procedures. For example, many cylinder head bolts require a specific torque followed by an angle rotation.

Q4

Are all torque specifications the same for different materials?

No, torque specifications vary based on material type, bolt size, and thread pitch. For example, torque specifications for aluminum components will be different from steel components of the same size. Using generic torque values will almost certainly lead to problems. Always refer to the manufacturer's specifications for the 2.0L engine for accurate values.

Q5

How often should I check torque specifications on critical engine components?

It's generally recommended to re-check torque on critical components, especially after initial installation or after an engine has been disassembled. It is best practice to double-check torque after the first run of an engine. For normal maintenance, it's not necessary to check all bolts, but following the recommended service intervals is important. Always check bolts that have been removed or reinstalled. Components like exhaust manifolds can sometimes loosen up over time due to heat cycling.

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 is essential for accurately tightening bolts to specification. 1/2" drive is common for larger engine fasteners.

  • Wide torque range (e.g., 20-150 ft-lbs)
  • Click-type mechanism for accuracy
  • Reversible ratchet
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench for lower torque fasteners. 3/8" is common for smaller bolts and accessories.

  • Lower torque range (e.g., 5-80 ft-lbs)
  • Click-type mechanism for accuracy
  • Reversible ratchet
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is needed to fit all bolts.

  • Variety of sizes (e.g., 8mm-24mm)
  • 6-point design for secure grip
  • Various depths (standard, deep)
Learn more

Socket Extension Bars

Used to extend the reach of the socket.

  • Various lengths
  • Allows access to hard-to-reach areas
  • Durable material (e.g., chrome vanadium)
Learn more

Torx Socket Set

Many fasteners on this engine are torx-type and will require the use of the proper Torx sockets.

  • Variety of sizes (e.g., T20 - T60)
  • Allows access to internal torx fasteners
  • Durable material (e.g., chrome vanadium)
Learn more

Angle Gauge or Digital Torque Adapter

Required for bolts that need to be tightened to a specific angle after initial torque.

  • Precise angle measurement
  • Digital or analog options
  • Easy to attach to torque wrench
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure

Procedure for tightening cylinder head bolts on the 2.0L engine.

  • Clean all bolt threads and cylinder head surfaces.
  • Install the cylinder head onto the engine block.
  • Install new cylinder head bolts finger tight.
  • Using the specified sequence, torque all bolts to 30 ft-lbs.
  • Using the specified sequence, tighten all bolts to 90 degrees.
  • Using the specified sequence, tighten all bolts an additional 90 degrees.
View full procedure

Main Bearing Cap Bolt Tightening Procedure

Procedure for tightening the main bearing cap bolts.

  • Clean all bolt threads and cap surfaces.
  • Install all main bearing caps onto the block, noting the correct orientation.
  • Install new main bearing cap bolts finger tight.
  • Using the specified sequence, torque all bolts to 22 ft-lbs.
  • Using the specified sequence, tighten all bolts an additional 90 degrees.
  • Using the specified sequence, tighten all bolts an additional 90 degrees.
View full procedure

Connecting Rod Bolt Tightening Procedure

Procedure for tightening connecting rod bolts.

  • Clean all bolt threads and cap surfaces.
  • Install all connecting rod caps, noting the correct orientation.
  • Install new connecting rod bolts finger tight.
  • Using the specified sequence, torque all bolts to 22 ft-lbs.
  • Using the specified sequence, tighten all bolts an additional 90 degrees.
View full procedure

Intake Manifold Bolt Tightening Procedure

Procedure for tightening intake manifold bolts.

  • Install the intake manifold.
  • Install the intake manifold bolts finger tight.
  • Using the specified sequence, torque all bolts to 7 ft-lbs.
View full procedure

Exhaust Manifold Bolt Tightening Procedure

Procedure for tightening exhaust manifold bolts.

  • Install the exhaust manifold.
  • Install the exhaust manifold bolts finger tight.
  • Using the specified sequence, torque all bolts to 22 ft-lbs.
View full procedure

Oil Pan Bolt Tightening Procedure

Procedure for tightening oil pan bolts.

  • Install the oil pan with new gasket or sealant.
  • Install the oil pan bolts finger tight.
  • Using the specified sequence, torque all bolts to 11 ft-lbs.
View full procedure
Technical Service Bulletins

Excessive Oil Consumption on 2.0L TFSI Engines

2018-06-15

Certain 2.0L TFSI engines may experience excessive oil consumption due to piston ring issues. This bulletin addresses the diagnostic procedure and repair solutions.

2013-2017

Resolution: Perform an oil consumption test. If necessary, replace piston rings and possibly the piston assembly. Ensure proper torque specification on connecting rod bolts during reassembly.

Timing Chain Tensioner Failure on 2.0L TFSI Engines

2020-01-20

Timing chain tensioner failure can cause severe engine damage on 2.0L TFSI engines. This bulletin details inspection and replacement procedures.

2013-2018

Resolution: Inspect the timing chain tensioner for proper function. Replace the tensioner and chain as necessary. Ensure proper torque specification for all related bolts during reassembly.

Coolant Leak from Water Pump on 2.0L TFSI Engines

2022-08-01

Water pump leaks on 2.0L TFSI engines may stem from gasket failure or internal component wear. This bulletin provides guidance on replacement and torque procedures.

2013-Present

Resolution: Inspect the water pump for leaks. Replace the water pump assembly, always using a new gasket. Ensure proper torque specification for all related bolts during reassembly.

About the Author

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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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