Audi Audi S5 2007-2016 3.0L Engine Bolt Torque Specifications & Fastener Values
Audi Audi S5 2007-2016

Audi Audi S5 2007-2016 3.0L Engine Bolt Torque Specifications

Detailed torque specifications for various bolts on the 3.0L supercharged engine found in the 2007-2016 Audi S5 B8 generation. Includes cylinder head, main bearing, connecting rod, and other critical fasteners.

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

Cylinder Head

Torque specifications for components related to the cylinder head, including bolts securing the head to the block, valve covers, and related components. Proper torque is crucial for combustion sealing and preventing leaks.

1

Cylinder Head Bolts (Long)

M10 x 1.5
Important Notes
These are torque-to-yield (TTY) bolts and must be replaced after removal. Follow the correct torque sequence, which typically is from the center out in a criss-cross pattern. The angle tightening should be done accurately using an angle gauge or adapter.
2

Cylinder Head Bolts (Short)

M10 x 1.5
Important Notes
These are torque-to-yield (TTY) bolts and must be replaced after removal. These bolts are typically located near the timing cover area. Follow the same torque sequence as the long bolts.
3

Cylinder Head Bolts (Timing Cover Area)

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
These are smaller M8 bolts located around the timing cover area. Ensure clean threads and proper seating before torquing.
4

Valve Cover Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten these bolts evenly to avoid warping the valve cover and ensure a proper seal. A tightening sequence starting from the center outwards in a criss-cross pattern is recommended.

Engine Block And Internals

Torque specifications for bolts securing the main bearing caps, connecting rods, oil pan, and oil drain plug. Correct torque is essential for proper engine function and longevity.

1

Main Bearing Cap Bolts (Inner)

M10
Important Notes
These bolts are typically torque-to-yield (TTY) and should be replaced after removal. Follow the correct sequence from center outwards. Angle tightening should be accurate.
2

Main Bearing Cap Bolts (Outer)

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Tighten these bolts after the inner main bearing cap bolts are torqued. Use the correct sequence. These are not TTY bolts.
3

Connecting Rod Bolts

M9 x 1
Important Notes
These are torque-to-yield (TTY) stretch bolts and must be replaced when removed. Ensure proper lubrication of the bolt threads and under the bolt head. Follow a correct torque sequence and use an angle gauge.
4

Oil Pan Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Use a criss-cross tightening pattern to ensure even pressure and a proper seal. Be careful not to overtighten bolts in the aluminum oil pan, as it can cause stripping or distortion.
5

Oil Drain Plug

M14 or M16
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure a new sealing washer is used. Do not overtighten to prevent damaging the oil pan threads. This value is a general recommendation; check your vehicle’s specific torque spec.

Timing System

Torque specifications for components within the timing system, including camshaft sprockets, sensors, chain tensioners, and chain guides. Proper torque is critical for maintaining accurate engine timing.

1

Camshaft Sprocket Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the sprockets are properly aligned before tightening. Use new bolts if specified in your vehicle's repair manual. Ensure correct engine timing is set prior to torquing.
2

Camshaft Position Sensor Bolt

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten this bolt to specification for proper sensor operation. Be careful not to overtighten to avoid damaging sensor mounting hole in aluminum.
3

Timing Chain Tensioner Mounting Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure tensioners are installed properly and engage correctly before tightening.
4

Timing Chain Guide Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure chain guides are positioned correctly before tightening. Do not overtighten these bolts.

Intake And Exhaust

Torque specifications for intake manifold, throttle body, exhaust manifolds/headers and downpipe components. Proper sealing is essential to prevent vacuum and exhaust leaks.

1

Intake Manifold Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Use a criss-cross tightening sequence to ensure even sealing pressure and prevent leaks. Ensure intake manifold gasket is properly placed.
2

Throttle Body Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment before tightening. Do not overtighten these bolts.
3

Exhaust Manifold/Header Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure exhaust manifold gaskets are properly placed before installation. Use the correct tightening sequence to prevent leaks.
4

Exhaust Downpipe to Manifold Bolts

M8/M10
Torque Value
22 ft-lbs (30 N·m)
Important Notes
This is an estimated value. Torque range may vary based on bolt size and material. Use a new gasket and tighten evenly to ensure a proper seal and prevent exhaust leaks.

Cooling System

Torque specifications for water pump and thermostat housing components. Proper torque is crucial for sealing coolant passages and preventing leaks.

1

Water Pump Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to ensure proper sealing and prevent coolant leaks.
2

Thermostat Housing Bolts

M6
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure thermostat and seal are properly installed before tightening the bolts. Do not overtighten.

Ancillary Components

Torque specifications for alternator, starter motor, and A/C compressor mounting bolts. Securely mounting these components is important for proper function and safety.

1

Alternator Mounting Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of the alternator before tightening the bolts. Proper tension of the drive belt is also important.
2

Starter Motor Mounting Bolts

M8/M10
Torque Value
30 ft-lbs (40 N·m)
Important Notes
This is an estimated value, torque may vary based on bolt size and starter type. Check vehicle service manual for specific values. Ensure proper engagement and alignment before tightening the bolts.
3

A/C Compressor Mounting Bolts

M8
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure compressor is properly aligned and seated before tightening the bolts.

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 is it critical to use the correct torque specifications?

Using the correct torque specifications ensures proper clamping force, preventing leaks, component damage, and premature failure. Over-tightening can stretch or break bolts, damage threads, and warp components like the cylinder head or oil pan. Under-tightening can lead to leaks, loosening, and potential catastrophic engine damage. For example, overtightening the oil drain plug could strip the threads in the oil pan, causing a leak and requiring expensive repairs.

Q2

What should I do if I accidentally overtighten a bolt?

If you suspect you've overtightened a bolt, especially on critical engine components, it's best to remove it, inspect the threads on both the bolt and the component, and if needed, replace the bolt. Overtightening can stretch the bolt beyond its yield point, making it unsafe for re-use, even if it appears visually okay. Using a thread chaser to clean the threads in the component is good practice. It is crucial to replace the bolt with a new one, and torque it to spec.

Q3

Should I use new bolts every time I disassemble engine components?

In many cases, yes. Particularly with torque-to-yield (TTY) bolts, which are designed to stretch upon initial torquing. These bolts should ALWAYS be replaced, as they cannot provide consistent clamping after being stretched. Examples include cylinder head bolts and connecting rod bolts. Reusing these bolts can lead to engine failure. Even with bolts not classified as TTY, it's often good practice to replace them if they're critical components or show signs of corrosion or fatigue.

Q4

What type of lubricant should I use when tightening bolts?

The type of lubricant or anti-seize used, if any, depends on the specific bolt and its application. Some bolts, like those for the exhaust system, may benefit from anti-seize. Others, especially those in internal engine applications where torque specifications are critical, may require clean threads or a specific thread lubricant, as specified in the service manual. Always follow the workshop manual recommendations and if you're not sure, leave the threads clean and dry to ensure accurate torque readings and prevent over-tightening, and if your manual calls for oil or some thread-locker, follow its guidelines.

Q5

How often should I check the torque on critical engine bolts?

Most bolts, once properly torqued, don't require frequent checking unless specified in your maintenance schedule. However, after a major engine repair or rebuild, re-checking bolts after the first few operating cycles (and as temperature changes) is advisable because of bolt settling and gasket compression. Always follow the service manual for maintenance recommendations.

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 inch drive)

A calibrated torque wrench is essential for accurately tightening bolts to specified torques. A 1/2 inch drive is versatile for various engine components.

  • Wide torque range (e.g., 20-250 ft-lbs)
  • Click-type or digital readout
  • Calibration certificate recommended
Learn more

Torque Wrench (3/8 inch drive)

A 3/8 inch drive torque wrench is suitable for smaller fasteners and lower torque specifications found in the 3.0L engine.

  • Suitable for lower torque ranges (e.g., 5-80 ft-lbs)
  • Click-type or digital readout
  • Calibration certificate recommended
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is necessary to fit all bolt heads in the 3.0L engine.

  • Variety of sizes (e.g., 8mm to 24mm)
  • 6-point sockets recommended
  • Deep and standard sockets
Learn more

Extension Bars

Extension bars of various lengths to access hard-to-reach bolts.

  • Various lengths (e.g., 3, 6, 10 inch)
  • 1/2 and 3/8 inch drive options
  • Secure locking mechanism
Learn more

Universal Joint/Swivel Adapter

For angled access to bolts, especially in the engine bay.

  • 1/2 and 3/8 inch drive options
  • Robust construction
  • Smooth swivel action
Learn more
Service Procedures

Intake Manifold Bolt Torque Procedure

Procedure for torquing the intake manifold bolts on the 3.0L engine.

  • Locate all intake manifold bolts.
  • Hand-tighten all bolts in a star pattern.
  • Torque all bolts to 10 Nm (7.4 ft-lbs) in a star pattern.
  • Check torque with torque wrench.
View full procedure

Supercharger Mounting Bolt Torque Procedure

Procedure for torquing the supercharger mounting bolts on the 3.0L engine.

  • Locate all supercharger mounting bolts.
  • Hand-tighten all bolts in a star pattern.
  • Torque all bolts to 25 Nm (18.4 ft-lbs) in a star pattern.
  • Check torque with torque wrench.
View full procedure

Crankshaft Pulley Bolt Torque Procedure

Procedure for torquing the crankshaft pulley bolt on the 3.0L engine.

  • Install a new crankshaft bolt.
  • Hand-tighten the new bolt.
  • Torque the bolt to 100 Nm (74 ft-lbs).
  • Rotate the bolt another 90 degrees
  • Check torque with torque wrench.
View full procedure

Valve Cover Bolt Torque Procedure

Procedure for torquing the valve cover bolts on the 3.0L engine.

  • Locate all valve cover bolts.
  • Hand-tighten all bolts in a criss-cross pattern.
  • Torque all bolts to 10 Nm (7.4 ft-lbs) in a criss-cross pattern.
  • Check torque with torque wrench.
View full procedure

Oil Pan Bolt Torque Procedure

Procedure for torquing the oil pan bolts on the 3.0L engine.

  • Locate all oil pan bolts.
  • Hand-tighten all bolts in a criss-cross pattern.
  • Torque all bolts to 25 Nm (18.4 ft-lbs) in a criss-cross pattern.
  • Check torque with torque wrench.
View full procedure
Technical Service Bulletins

Oil Leakage from Valve Cover

2012-05-15

Some 2007-2012 Audi S5 vehicles may experience oil leakage from the valve cover. This issue might be related to improper torque during installation.

2007-2012

Resolution: Inspect and replace the valve cover gasket. Ensure the valve cover bolts are torqued to 10 Nm (7.4 ft-lbs) following the specified criss-cross pattern.

Supercharger Mounting Bolt Loosening

2014-09-20

Instances of supercharger mounting bolts loosening on some 2010-2014 Audi S5 models have been reported, potentially leading to increased noise or performance issues.

2010-2014

Resolution: Inspect the supercharger mounting bolts. Re-torque all bolts to 25 Nm (18.4 ft-lbs) using a star pattern. If bolts are damaged, replace them.

Crankshaft Pulley Bolt Failure

2016-01-10

Isolated incidents of crankshaft pulley bolt failure on certain 2013-2016 Audi S5 vehicles were noted. These bolts must be torqued properly during installation, and are designed for one-time use.

2013-2016

Resolution: Always use a NEW crankshaft pulley bolt. Torque to 100 Nm (74 ft-lbs) plus 90 degrees. Check torque after installation with a torque wrench to confirm proper fastening.

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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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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