Audi Audi TT 2014-present Suspension Bolt Torque Specifications & Fastener Values
Audi Audi TT 2014-present

Audi Audi TT 2014-present Suspension Bolt Torque Specifications

Comprehensive guide to suspension bolt torque specifications for the 2014-Present Audi TT (8S) model. Includes torque values for various suspension components, ensuring proper installation and safety.

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

Front Suspension

Torque specifications for the front suspension components of a 2014-Present Audi TT, including struts, control arms, sway bar links, and steering components. These specifications are critical for safe and proper operation of the vehicle.

1

Strut to Steering Knuckle Bolts (Lower)

M14 x 1.5
Important Notes
These are safety-critical bolts. Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
2

Strut Top Mount Bolts (Chassis)

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Torque these bolts to the specified value.
3

Sway Bar Link to Strut Bolt

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Torque this bolt to the specified value.
4

Sway Bar Link to Sway Bar Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Torque this bolt to the specified value.
5

Lower Control Arm Inner Bolt (Chassis)

M12 x 1.5
Important Notes
These bolts are critical for maintaining suspension geometry. Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
6

Lower Control Arm Ball Joint Bolt (Steering Knuckle)

M12 x 1.5
Important Notes
This is a safety-critical bolt. Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
7

Tie Rod End Lock Nut (Steering Knuckle)

M14 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Torque the lock nut to the specified value to ensure proper steering function.
8

Subframe Bolts

M14 x 2.0
Important Notes
Use a crisscross pattern to tighten these bolts in multiple stages. Always use new bolts. Torque to the specified value, then turn an additional 90 degrees. Value is estimated.
9

Wheel Speed Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Torque this bolt to the specified value to prevent damage to the sensor. Estimated Value.

Rear Suspension

Torque specifications for the rear suspension components of a 2014-Present Audi TT, including shocks, control arms, sway bar links, and trailing arms. These specifications are crucial for proper handling and stability.

1

Rear Shock Absorber Lower Bolt

M12 x 1.5
Important Notes
Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
2

Rear Shock Absorber Upper Bolt/Nuts (Chassis)

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Torque these bolts/nuts to the specified value.
3

Upper Control Arm Inner Bolt (Chassis)

M12 x 1.5
Important Notes
Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
4

Upper Control Arm Outer Bolt (Wheel Carrier)

M12 x 1.5
Important Notes
Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
5

Lower Control Arm Inner Bolt (Chassis)

M12 x 1.5
Important Notes
Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
6

Lower Control Arm Outer Bolt (Wheel Carrier)

M12 x 1.5
Important Notes
Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
7

Trailing Arm Bolt (Chassis)

M12 x 1.5
Important Notes
Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
8

Trailing Arm Bolt (Wheel Carrier)

M12 x 1.5
Important Notes
Always use new bolts. Torque to the specified value, then turn an additional 90 degrees.
9

Rear Sway Bar Link to Control Arm Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Torque this bolt to the specified value.
10

Rear Sway Bar Link to Sway Bar Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Torque this bolt to the specified value.
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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 for suspension bolts?

Correct torque ensures proper clamping force, preventing bolts from loosening due to vibrations and stress, which could lead to component failure or loss of vehicle control. Under-tightening can cause bolts to come loose, while over-tightening can damage threads or weaken the bolt itself.

Q2

What happens if I over-torque a suspension bolt?

Over-torquing a suspension bolt can cause the bolt to stretch beyond its yield point, potentially leading to thread damage, bolt failure, and even component damage. This can also make future removal of the bolt difficult. It might be necessary to replace the bolt and/or the component.

Q3

What happens if I under-torque a suspension bolt?

Under-torquing a suspension bolt means it won't provide sufficient clamping force, leading to movement between parts. This can cause premature wear, clunking noises, and a loss of suspension performance and handling. Eventually, the bolt can completely back out causing significant danger.

Q4

Should I use new bolts when working on the suspension?

It is strongly recommended to use new, factory-specified bolts, especially for critical components like control arms, ball joints, and shock absorbers. Many suspension bolts are torque-to-yield (TTY) and are designed for one-time use. Using old bolts can compromise the integrity of the repair, even if they appear to be in good condition.

Q5

Can I reuse a bolt that has been torqued to yield?

No. Torque-to-yield (TTY) bolts are designed to stretch when tightened to their specified torque and should never be reused. Reusing a TTY bolt will not provide proper clamping force and can lead to failure. Always replace them with new ones per the vehicle manufacturer specification.

Q6

Do I need to use a torque wrench for suspension work?

Yes, absolutely. Using a torque wrench is essential for accurate and safe suspension work. Guessing the torque or using an impact wrench without a proper setting can easily result in over-torquing or under-torquing, leading to safety issues or component damage. A torque wrench ensures each bolt is tightened correctly.

Q7

Do I need to perform an alignment after working on the suspension?

Yes, after any significant suspension work, such as replacing control arms, struts, or other major components, you will need a wheel alignment. Even slight changes to the suspension geometry can negatively affect tire wear, handling, and driving safety.

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 with a 1/2 inch drive is essential for accurately tightening suspension bolts to the specified torque values.

  • Wide torque range (typically 20-200 Nm)
  • Audible click or digital readout for accurate torque settings
  • Durable construction for repeated use
Learn more

Torque Wrench (3/8 inch drive)

A calibrated torque wrench with a 3/8 inch drive is useful for lower torque bolts and bolts in tight spaces.

  • Lower torque range (typically 5-80 Nm)
  • Audible click or digital readout for accurate torque settings
  • Compact design for maneuverability
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is needed to fit the various bolt and nut sizes used in the suspension system.

  • Variety of sizes from 10mm to 24mm or larger
  • 6-point sockets for secure grip and reduced slippage
  • Deep and shallow sockets for different applications
Learn more

Extension Bars

Extension bars allow for access to bolts in recessed locations where a direct connection to the torque wrench is not possible.

  • Varying lengths for different access requirements
  • Durable construction to withstand torque application
  • Secure connection to sockets and torque wrenches
Learn more

Universal Joint

A universal joint helps to apply torque at an angle when the bolt or nut is not easily accessed with a straight socket connection.

  • Allows for angled torque application
  • Durable construction to withstand torque application
  • Secure connection to sockets and torque wrenches
Learn more
Service Procedures

Front Strut Assembly Removal and Installation

Detailed steps for removing and installing the front strut assembly, including proper torque specifications for all mounting bolts and nuts.

  • Loosen the wheel bolts and raise the vehicle.
  • Remove the wheel and brake caliper assembly.
  • Disconnect the sway bar link from the strut assembly.
  • Disconnect any electrical sensors or lines from the strut.
  • Remove the bolts securing the strut to the steering knuckle.
  • Remove the bolts securing the upper strut mount to the vehicle.
  • Carefully remove the strut assembly.
  • Install the new strut assembly using the reverse of removal procedure.
  • Torque all bolts to specification (strut to knuckle, upper strut mount, sway bar link).
  • Reinstall the brake caliper, wheel, and lower vehicle.
View full procedure

Rear Shock Absorber Replacement

Detailed steps for removing and installing the rear shock absorber, including proper torque specifications for all mounting bolts and nuts.

  • Loosen the wheel bolts and raise the vehicle.
  • Remove the wheel.
  • Access the lower and upper shock mounting bolts.
  • Disconnect any electrical sensors or lines from the shock absorber.
  • Remove the bolts securing the shock to the vehicle.
  • Carefully remove the shock absorber.
  • Install the new shock absorber using the reverse of removal procedure.
  • Torque all bolts to specification (upper and lower shock mount).
  • Reinstall the wheel and lower vehicle.
View full procedure

Control Arm Replacement (Front or Rear)

Detailed steps for removing and installing a control arm, including proper torque specifications for all mounting bolts and nuts, as well as the correct tightening procedure.

  • Loosen the wheel bolts and raise the vehicle.
  • Remove the wheel.
  • Locate the control arm and associated bolts/nuts.
  • Disconnect the control arm from the steering knuckle (if front) or hub assembly (if rear).
  • Remove the bolts securing the control arm to the subframe or chassis.
  • Remove the control arm.
  • Install the new control arm using the reverse of removal procedure.
  • Torque all bolts to specification. Tighten with the suspension loaded to ride height.
  • Reinstall the wheel and lower the vehicle.
View full procedure
Technical Service Bulletins

Suspension Bolt Loosening Issue

2018-07-15

Some vehicles have reported suspension bolts loosening over time, which can lead to alignment issues or instability.

2014-2017 Audi TT (8S)

Resolution: Inspect all suspension bolts and nuts for proper torque. Replace all bolts, nuts, and washers and torque to factory specifications, using thread locking compound. Recheck torque after 500 miles.

Front Strut Top Mount Creaking

2020-03-22

Creaking noises originating from the front strut top mounts have been reported. This may be due to improper torque or worn components.

2016-2020 Audi TT (8S)

Resolution: Inspect the front strut top mounts for damage or excessive wear. Replace strut mounts if necessary. Verify that all mounting bolts are torqued to the correct specifications. Ensure top nut is properly torqued.

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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  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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