Audi Audi TTS 2015-present 2.0L Engine Bolt Torque Specifications
Comprehensive guide to torque specifications for various bolts on the 2.0L engine found in the 2015-Present Audi TTS. Includes cylinder head bolts, main bearing bolts, connecting rod bolts, and more.
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
Engine Block Internal
Torque specifications for components within the engine block, including critical fasteners for sealing and structural integrity.
1 Cylinder Head Bolts
M10 x 1.25
Cylinder Head Bolts
M10 x 1.25Important Notes
2 Main Bearing Cap Bolts
M12 x 1.5
Main Bearing Cap Bolts
M12 x 1.5Important Notes
3 Connecting Rod Bolts
M9 x 1.0
Connecting Rod Bolts
M9 x 1.0Important Notes
4 Oil Pan Bolts (M6)
M6 x 1.0
Oil Pan Bolts (M6)
M6 x 1.0Torque Value
Important Notes
5 Oil Pan Bolts (M8)
M8 x 1.25
Oil Pan Bolts (M8)
M8 x 1.25Torque Value
Important Notes
6 Oil Pump Mounting Bolts
M6 x 1.0
Oil Pump Mounting Bolts
M6 x 1.0Torque Value
Important Notes
7 Flywheel/Flexplate Bolts
M10 x 1.0
Flywheel/Flexplate Bolts
M10 x 1.0Important Notes
External Components
Torque specifications for components mounted to the exterior of the engine block.
1 Intake Manifold Bolts
M6 x 1.0
Intake Manifold Bolts
M6 x 1.0Torque Value
Important Notes
2 Exhaust Manifold Bolts
M8 x 1.25
Exhaust Manifold Bolts
M8 x 1.25Torque Value
Important Notes
3 Turbocharger Mounting Bolts
M10 x 1.5
Turbocharger Mounting Bolts
M10 x 1.5Torque Value
Important Notes
4 Turbocharger Oil Supply Line Bolts (Banjo Bolts)
M12 x 1.5
Turbocharger Oil Supply Line Bolts (Banjo Bolts)
M12 x 1.5Torque Value
Important Notes
5 Turbocharger Oil Return Line Bolts
M8 x 1.25
Turbocharger Oil Return Line Bolts
M8 x 1.25Torque Value
Important Notes
6 Starter Motor Bolts
M10 x 1.5
Starter Motor Bolts
M10 x 1.5Torque Value
Important Notes
7 Alternator Mounting Bolts
M8 x 1.25
Alternator Mounting Bolts
M8 x 1.25Torque Value
Important Notes
8 Accessory Drive Belt Tensioner Mounting Bolts
M8 x 1.25
Accessory Drive Belt Tensioner Mounting Bolts
M8 x 1.25Torque Value
Important Notes
9 Water Pump Bolts
M6 x 1.0
Water Pump Bolts
M6 x 1.0Torque Value
Important Notes
10 Thermostat Housing Bolts
M6 x 1.0
Thermostat Housing Bolts
M6 x 1.0Torque Value
Important Notes
Sensors And Misc
Torque specifications for various sensors and other minor components on the engine.
1 Crankshaft Position Sensor Bolt
M6 x 1.0
Crankshaft Position Sensor Bolt
M6 x 1.0Torque Value
Important Notes
2 Camshaft Position Sensor Bolt
M6 x 1.0
Camshaft Position Sensor Bolt
M6 x 1.0Torque Value
Important Notes
3 Knock Sensor Bolt
M8 x 1.25
Knock Sensor Bolt
M8 x 1.25Torque Value
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 are torque specifications so important?
Why are torque specifications so important?
Correct torque specifications are crucial to ensure proper clamping force, preventing leaks, component failure, and damage to threads. Over-tightening can strip threads or deform components, while under-tightening can lead to loosening and potential catastrophic failure. For example, if the cylinder head bolts are not torqued correctly, you can experience head gasket failure, leading to coolant leaks and engine damage.
Q2 Should I use new bolts when reassembling components?
Should I use new bolts when reassembling components?
It is highly recommended to use new bolts, especially torque-to-yield (TTY) bolts, when reassembling engine components. TTY bolts stretch when tightened and cannot be reused reliably. Reusing these can lead to inconsistent clamping force and potential failure. Always consult the repair manual to confirm bolt types and replacement recommendations. Ignoring this, like with the intake manifold bolts, can result in intake leaks.
Q3 What does 'Nm' and 'lb-ft' mean in torque specifications?
What does 'Nm' and 'lb-ft' mean in torque specifications?
'Nm' stands for Newton-meters, which is the standard metric unit for torque. 'lb-ft' stands for pound-feet, a common imperial unit for torque. Always ensure you are using the correct unit for your torque wrench and refer to the torque spec accordingly. Mixing up the units can cause massive over or under tightening. 50Nm is not equal to 50 lb-ft, always double-check.
Q4 What type of torque wrench should I use?
What type of torque wrench should I use?
It's best to use a calibrated torque wrench for engine work. Click-type torque wrenches are common and work well for most applications, however, a digital torque wrench will provide more precision, especially with low torque specifications. It is recommended you check that your torque wrench is within its calibration cycle, as an inaccurate tool will not give you the correct torque. A 20 Nm specification might only need a 3/8 inch drive wrench, while a higher torque, like a flywheel bolt, would require a 1/2 inch drive.
Q5 How do I deal with torque-to-yield (TTY) bolts?
How do I deal with torque-to-yield (TTY) bolts?
TTY bolts, often used in critical areas like cylinder heads, have specific tightening procedures involving stages of torque and angle. You must use a torque wrench, followed by an angle gauge or torque angle meter to correctly apply the final torque. Reusing TTY bolts is highly discouraged, as they are designed for one-time use. Improper torque procedure can cause severe engine damage.
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 inch drive)
A calibrated torque wrench is essential for applying the correct torque to bolts and fasteners on the engine. A 1/2 inch drive is recommended for most engine components.
- Accurate torque measurement
- Audible click or signal when torque is reached
Torque Wrench (3/8 inch drive)
A smaller torque wrench is useful for bolts and fasteners that require lower torque values or are in tight spaces. A 3/8 inch drive is often preferred for smaller components.
- Suitable for lower torque values
- Compact size for tight spaces
Socket Set (Metric)
A comprehensive metric socket set is required to fit all bolt head sizes found on the 2.0L engine.
- Variety of sizes (6mm - 24mm recommended)
- Durable construction
Socket Extensions
Extensions will allow access to bolts and fasteners in recessed or hard to reach areas.
- Various lengths for optimal reach
- Durable construction
Universal Joint
A universal joint will allow the user to apply torque at an angle when needed.
- Allows access at angles
- Durable construction
Torque Angle Gauge
Some bolts require both a torque and angle measurement for proper tightening. This tool ensures precise angular tightening.
- Accurate angle measurement
- Easy to use
Service Procedures
Cylinder Head Bolt Tightening Procedure (2.0L Engine)
This procedure outlines the proper sequence and torque specifications for tightening the cylinder head bolts on a 2.0L engine.
- Clean all bolt threads and ensure the mating surfaces are clean.
- Install the cylinder head and all bolts finger tight.
- Tighten all bolts in the specified sequence to 40 Nm.
- Tighten all bolts in the specified sequence to 60 Nm.
- Tighten all bolts in the specified sequence an additional 90 degrees using a torque angle gauge.
- Tighten all bolts in the specified sequence an additional 90 degrees using a torque angle gauge.
Intake Manifold Bolt Tightening Procedure (2.0L Engine)
This procedure outlines the proper sequence and torque specifications for tightening the intake manifold bolts on a 2.0L engine.
- Clean all bolt threads and ensure the mating surfaces are clean.
- Install the intake manifold and all bolts finger tight.
- Tighten all bolts in the specified sequence to 10 Nm.
- Tighten all bolts in the specified sequence to 20 Nm.
Exhaust Manifold Bolt Tightening Procedure (2.0L Engine)
This procedure outlines the proper sequence and torque specifications for tightening the exhaust manifold bolts on a 2.0L engine.
- Clean all bolt threads and ensure the mating surfaces are clean.
- Install the exhaust manifold and all bolts finger tight.
- Tighten all bolts in the specified sequence to 25 Nm.
- Recheck to ensure all bolts are torqued to 25 Nm.
Engine Oil Pan Bolt Tightening Procedure (2.0L Engine)
This procedure outlines the proper sequence and torque specifications for tightening the engine oil pan bolts on a 2.0L engine.
- Clean all bolt threads and ensure the mating surfaces are clean.
- Install the engine oil pan and all bolts finger tight.
- Tighten all bolts in the specified sequence to 15 Nm.
Technical Service Bulletins
Cylinder Head Bolt Retorque Recommendation
2018-03-15Some early models of the 2.0L engine may experience a decrease in cylinder head bolt torque after initial installation.
Resolution: Check the cylinder head bolt torque after 500 miles of initial use and re-torque to specification if needed.
Intake Manifold Bolt Loosening Issue
2020-07-20Reports of intake manifold bolts loosening over time have been received. Inspection and proper torque application is recommended during routine maintenance.
Resolution: Inspect intake manifold bolts and re-torque to specification. Consider using threadlocker on bolts that have previously loosened.
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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.