Audi Audi TTS 2008-2014 2.0L Engine Bolt Torque Specifications
Comprehensive list of torque specifications for various bolts on the 2.0L engine of the 2008-2014 Audi TTS. Includes cylinder head bolts, main bearing bolts, connecting rod bolts, and other critical engine fasteners.
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
Search Specifications
Search by component name, bolt size, or description
Torque Calculator
Convert between different torque units
Intake And Exhaust System
Torque specifications for components related to the intake and exhaust systems, including manifolds, turbocharger, and related fittings.
1 Intake Manifold Bolts
M6 or M8
Intake Manifold Bolts
M6 or M8Torque Value
Important Notes
2 Exhaust Manifold/Turbocharger to Cylinder Head Studs/Nuts
M10
Exhaust Manifold/Turbocharger to Cylinder Head Studs/Nuts
M10Torque Value
Important Notes
3 Turbocharger Oil Feed Line Fitting (Banjo Bolt)
M10 or M12 (estimated)
Turbocharger Oil Feed Line Fitting (Banjo Bolt)
M10 or M12 (estimated)Torque Value
Important Notes
4 Turbocharger Oil Drain Line Fitting Bolts
M6 or M8
Turbocharger Oil Drain Line Fitting Bolts
M6 or M8Torque Value
Important Notes
5 Downpipe/Exhaust to Turbo Flange Bolts
M8 or M10
Downpipe/Exhaust to Turbo Flange Bolts
M8 or M10Torque Value
Important Notes
Cooling System
Torque specifications for components related to the engine's cooling system, including the water pump and thermostat housing.
1 Water Pump Bolts
M6
Water Pump Bolts
M6Torque Value
Important Notes
2 Thermostat Housing Bolts
M6 or M8
Thermostat Housing Bolts
M6 or M8Torque Value
Important Notes
Accessory Drive Components
Torque specifications for components driven by the engine, including the crankshaft pulley, alternator, power steering pump, and AC compressor.
1 Crankshaft Pulley Bolt (Central Bolt)
Large, estimated M16-M20
Crankshaft Pulley Bolt (Central Bolt)
Large, estimated M16-M20Important Notes
2 Alternator Mounting Bolts
M8 or M10
Alternator Mounting Bolts
M8 or M10Torque Value
Important Notes
3 Power Steering Pump Bolts
M8 or M10
Power Steering Pump Bolts
M8 or M10Torque Value
Important Notes
4 Air Conditioning Compressor Bolts
M8 or M10
Air Conditioning Compressor Bolts
M8 or M10Torque Value
Important Notes
Other
Torque specifications for miscellaneous components such as engine mounts and flywheel/flexplate.
1 Engine Mount Bolts
M8 to M12
Engine Mount Bolts
M8 to M12Torque Value
Important Notes
2 Flywheel/Flexplate Bolts
M8 or M10 (estimated)
Flywheel/Flexplate Bolts
M8 or M10 (estimated)Important Notes
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
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 Why is using the correct torque specification crucial?
Why is using the correct torque specification crucial?
Using the correct torque specification is critical to ensure proper clamping force, preventing leaks, component damage, and bolt fatigue. Overtightening can strip threads or crack components, while undertightening can lead to loosening and component failure. For example, improperly torqued cylinder head bolts can cause coolant leaks or engine overheating.
Q2 Do torque specifications differ for new vs. used bolts?
Do torque specifications differ for new vs. used bolts?
Generally, torque specifications are for clean, dry bolts. If using used bolts, inspect them for damage or stretching, and consider using new bolts, especially for critical engine components like the cylinder head, main bearing caps, or connecting rods. For bolts that are stretched or have significantly different friction properties, you might need to reduce the torque. Always consult the manufacturer's recommendation for specific reuse.
Q3 What is the importance of torque angle after initial torque?
What is the importance of torque angle after initial torque?
Many critical bolts, particularly cylinder head bolts, require a torque-angle method after the initial torque setting. This involves tightening the bolt to a specific torque and then rotating it a specific number of degrees. This ensures accurate clamping force by taking into account bolt stretch and eliminates variations due to friction. It is absolutely crucial to follow this method when specified.
Q4 What should I do if I don't have a torque wrench?
What should I do if I don't have a torque wrench?
It is highly recommended to use a calibrated torque wrench for all torque-specified bolts. Guessing or using a generic wrench can cause serious engine damage. If a torque wrench isn't available, it's best to stop work and find one before proceeding. Consider renting a torque wrench from an auto parts store or borrowing from a mechanic.
Q5 How often should I check the torque on critical engine bolts?
How often should I check the torque on critical engine bolts?
Unless specified in the manufacturer's service manual, it is not typically necessary to re-torque bolts once properly installed. However, if the engine has been recently rebuilt or certain components replaced, it is beneficial to re-check the torque after a brief running-in period (e.g. after 1000 miles). If you suspect a leak or loose bolt, torque should be checked as part of troubleshooting procedures.
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
Torque Wrench (1/2" Drive)
A calibrated torque wrench for accurately tightening bolts to specified torque values. 1/2" drive is common for engine components.
- Accurate torque measurement
- Click-type mechanism for audible feedback
- Wide torque range
Torque Wrench (3/8" Drive)
A smaller torque wrench for use on smaller bolts and more confined areas.
- Accurate torque measurement
- Click-type mechanism for audible feedback
- Lower torque range
Socket Set (Metric)
A comprehensive set of metric sockets to fit the various bolt heads on the 2.0L engine.
- Multiple sizes to fit various bolts
- 6-point design to prevent slippage
- Durable construction
Extension Bars
Extension bars to access bolts in hard-to-reach locations.
- Various lengths
- Secure connection to sockets
- Durable construction
Swivel Joint
A swivel joint (universal joint) to help reach bolts at angles.
- Flexible articulation
- Secure connection to sockets and extension bars
- Durable construction
Service Procedures
Cylinder Head Bolt Tightening
Procedure for tightening the cylinder head bolts on the 2.0L engine. This usually requires a specific torque-to-yield procedure.
- Clean all mating surfaces thoroughly.
- Install new cylinder head bolts.
- Torque bolts to Stage 1 specification (e.g. 40Nm)
- Torque bolts to Stage 2 specification (e.g. 60Nm)
- Tighten bolts to Stage 3 specification (e.g. an additional 90 degree turn)
- Check all bolts are torqued correctly.
Connecting Rod Bolt Tightening
Procedure for torquing the connecting rod bolts.
- Clean all mating surfaces.
- Install new connecting rod bolts.
- Torque bolts to Stage 1 specification (e.g. 25 Nm)
- Torque bolts to Stage 2 specification (e.g. an additional 90 degree turn)
- Check all bolts are torqued correctly.
Main Bearing Cap Bolt Tightening
Procedure for torquing the main bearing cap bolts.
- Clean all mating surfaces.
- Install new main bearing bolts.
- Torque bolts to Stage 1 specification (e.g. 65Nm)
- Torque bolts to Stage 2 specification (e.g. an additional 90 degree turn)
- Check all bolts are torqued correctly.
Intake Manifold Bolt Tightening
Procedure for torquing the bolts that secure the intake manifold to the cylinder head.
- Clean all mating surfaces.
- Install intake manifold.
- Torque all bolts to specification (e.g. 10 Nm).
- Check all bolts are torqued correctly.
Exhaust Manifold Bolt Tightening
Procedure for torquing the bolts that secure the exhaust manifold to the cylinder head.
- Clean all mating surfaces.
- Install exhaust manifold.
- Torque all bolts to specification (e.g. 25 Nm)
- Check all bolts are torqued correctly.
Technical Service Bulletins
Oil Consumption Issues in 2.0L TFSI Engines
2013-07-15Technical service bulletin regarding excessive oil consumption issues affecting certain 2.0L TFSI engines. This can be caused by piston ring problems. Proper torque is crucial after any work in this area
Resolution: Replacement of piston rings and updated crankcase breather.
Cylinder Head Bolt Stretch Concerns
2010-04-22Technical service bulletin warning about the potential for cylinder head bolts to stretch after repeated use. Use of new bolts every time is crucial, and correct torque is necessary.
Resolution: Always use new cylinder head bolts and follow the correct torque sequence.
High Pressure Fuel Pump Bolt Torque
2011-11-03Technical service bulletin with specific torque information for the bolts on the high pressure fuel pump. Proper torque here can prevent leaks.
Resolution: Use a torque wrench and proper torque value when replacing high pressure fuel pump.
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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.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.