How to carry out replacement: Thermostat 1.8 T Audi TT 8N Roadster
Disclaimer
Change Audi TT 8N Roadster 3.2 VR6 quattro Thermostat yourself – manuals and video tutorials

How to change engine thermostat on AUDI TT Roadster (8N9) – replacement guide

downloads: 5
Views: 117
Download your free tutorial and fix AUDI TT Roadster (8N9) 1.8 T quattro problems yourself Download for free 2.71 MB Thermostat for Audi TT 8N Roadster Shop now
Leave a comment Open in a new tab
When to replace the Thermostat on your AUDI TT
Recommended replacement interval for the part category Thermostat : 50000 km
Important!
This replacement procedure can be used for:
AUDI TT Roadster (8N9) 1.8 T, AUDI TT Roadster (8N9) 1.8 T quattro, AUDI TT Roadster (8N9) 1.8 T quattro, AUDI TT Roadster (8N9) 1.8 T, AUDI TT Roadster (8N9) 1.8 T, AUDI TT Roadster (8N9) 1.8 T quattro, AUDI TT Roadster (8N9) 1.8 T … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Thermostat for TT Roadster (8N9) and other AUDI models
Alternative products
How to change Thermostat on Audi TT 8N Roadster 1.8 T – step-by-step instructions for straightforward car repair Thermostat
Tools
Replacement: engine thermostat – AUDI TT Roadster (8N9). Tools you might need:
Wire brush
All-purpose cleaning spray
Electronic spray
Sealant
Torque wrench
Combination spanner #10
Combination spanner #13
Combination spanner #17
Combination spanner #46
Drive socket # 10
Drive socket # 13
HEX bit No.H5
HEX bit No.H8
Ratchet wrench
Funnel
Fluid container
Pincers
Fender cover
Buy tools
Replacement: engine thermostat – AUDI TT Roadster (8N9). AUTODOC experts recommend:
  • Check the condition of the coolant every time you replace the thermostat. Change the coolant if necessary.
  • All work should be done with the engine stopped.
Carry out replacement in the following order:
  1. Step 1
    Open the hood.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    How to change Thermostat on Audi TT 8N Roadster 1999 - free PDF and video manuals
    Unscrew the engine cover fastener. Use HEX No.H5. Use a ratchet wrench.
  2. Step 4
    How to replace AUDI TT Roadster (8N9) 1.8 T 2000 Thermostat - step-by-step manuals and video guides
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Do not use excessive force when removing the part as this may damage it.
  3. Step 5
    Audi TT 8N Roadster 1.8 T quattro 2001 Thermostat replacement: free workshop manuals
    Unscrew the coolant reservoir cap.
  4. Step 6
    Changing Thermostat on AUDI TT Roadster (8N9) 1.8 T 2002 by yourself
    Prepare a container for fluids.
  5. Step 7
    How to remove AUDI TT 1.8 T quattro 2003 Thermostat - online easy-to-follow instructions
    Clean the coolant hose. Use all-purpose cleaning spray.
  6. Step 8
    How to replace Thermostat on AUDI TT Roadster (8N9) 2004: download PDF manuals and video instructions
    Disconnect the coolant pipe retaining clip.
  7. Step 9
    How hard is it to do yourself: Thermostat replacement on Audi TT 8N Roadster 1.8 T 2005 - download illustrated guide
    Detach the coolant hose.
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Professionals recommend:
    Caution! Coolant may leak out of the coolant lines and thermostat housing.
  8. Step 10
    Need to know how to renew Thermostat on AUDI TT 2006? This free workshop manual will help you to do it yourself
    Drain the coolant from the engine.
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Tip:
    Caution! The coolant can be very hot.Wear gloves to prevent contact with hot liquid.All work should be done with the engine stopped.Wait until the coolant has completely flowed out of the drain hole.
  9. Step 11
    Changing of Thermostat on Audi TT 8N Roadster 1999 won't be an issue if you follow this illustrated step-by-step guide
    Clean the coolant hose. Use all-purpose cleaning spray.
  10. Step 12
    AUDI TT 3.2 VR6 quattro Thermostat replacement: online guides and video tutorials
    Attach the coolant hose.
  11. Step 13
    Connect the coolant pipe retaining clip.
    Step 14
    Replacing Thermostat on Audi TT 8N Roadster 2001 1.8 T by yourself
    Clean the coolant hose. Use all-purpose cleaning spray.
  12. Step 15
    TT Roadster (8N9) 1.8 T quattro 2002 Thermostat DIY replacement workshop manual
    Pull aside the V-ribbed belt tensioner pulley. Use a combination spanner #17.
  13. Step 16
    How to change Thermostat on AUDI TT Roadster (8N9) 2003 - tips and tricks
    Remove the V-ribbed belt.
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Tip from AUTODOC:
    Check the condition of the tensioner pulley and idler pulley. Replace them if necessary.
  14. Step 17
    Step-by-step recommendations for DIY replacement Audi TT 8N Roadster 2004 1.8 T quattro Thermostat
    Return the tensioner pulley to its initial position.
  15. Step 18
    DIY replacement of Thermostat on AUDI TT Roadster (8N9) 3.2 VR6 quattro 2005 is not an issue anymore with our step-by-step tutorial
    Remove the battery cover.
  16. Step 19
    How to change Thermostat on Audi TT 8N Roadster 1999 - free PDF and video manuals
    Unscrew the fasteners of the car battery terminals. Use a combination spanner #10.
  17. Step 20
    How to replace AUDI TT Roadster (8N9) 1.8 T 2000 Thermostat - step-by-step manuals and video guides
    Remove the battery terminals.
  18. Step 21
    Audi TT 8N Roadster 1.8 T quattro 2001 Thermostat replacement: free workshop manuals
    Loosen the alternator fasteners. Use HEX No.H8.
  19. Step 22
    Changing Thermostat on AUDI TT Roadster (8N9) 1.8 T 2002 by yourself
    Unscrew the fastener of the viscous fan clutch. Use a combination spanner #46. Use HEX No.H8.
  20. Step 23
    How to remove AUDI TT 1.8 T quattro 2003 Thermostat - online easy-to-follow instructions
    Loosen the alternator fasteners. Use HEX No.H8.
  21. Step 24
    How to replace Thermostat on AUDI TT Roadster (8N9) 2004: download PDF manuals and video instructions
    Remove the alternator.
  22. Step 25
    How hard is it to do yourself: Thermostat replacement on Audi TT 8N Roadster 1.8 T 2005 - download illustrated guide
    Disconnect the alternator connector.
  23. Step 26
    Need to know how to renew Thermostat on AUDI TT 2006? This free workshop manual will help you to do it yourself
    Unscrew the alternator power cable fastener. Use a combination spanner #13.
  24. Step 27
    Changing of Thermostat on Audi TT 8N Roadster 1999 won't be an issue if you follow this illustrated step-by-step guide
    Clean the thermostat housing. Use all-purpose cleaning spray.
  25. Step 28
    AUDI TT 3.2 VR6 quattro Thermostat replacement: online guides and video tutorials
    Unscrew the thermostat housing fasteners. Use a drive socket #10. Use a ratchet wrench.
  26. Step 29
    Replacing Thermostat on Audi TT 8N Roadster 2001 1.8 T by yourself
    Remove the thermostat housing.
    AUTODOC recommends:
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Do not use excessive force when removing the part as this may damage it.
  27. Step 30
    TT Roadster (8N9) 1.8 T quattro 2002 Thermostat DIY replacement workshop manual
    Remove the thermostat. Use pincers.
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Tip:
    Do not apply excessive force when removing the part. Otherwise you may damage it.Caution! Coolant may leak out of the coolant lines and thermostat housing.
  28. Step 31
    How to change Thermostat on AUDI TT Roadster (8N9) 2003 - tips and tricks
    Clean the thermostat housing mounting seat. Use a wire brush. Use all-purpose cleaning spray.
  29. Step 32
    Install a new thermostat.
    AUTODOC recommends:
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Do not use excessive force during installation. This may damage the part.
    Step 33
    Step-by-step recommendations for DIY replacement Audi TT 8N Roadster 2004 1.8 T quattro Thermostat
    Treat the thermostat housing. Use a sealant.
  30. Step 34
    DIY replacement of Thermostat on AUDI TT Roadster (8N9) 3.2 VR6 quattro 2005 is not an issue anymore with our step-by-step tutorial
    Install the thermostat housing.
    Replacement: engine thermostat – AUDI TT Roadster (8N9). Tip from AUTODOC:
    When installing, do not use excessive force to avoid damage to the part.
  31. Step 35
    How to change Thermostat on Audi TT 8N Roadster 1999 - free PDF and video manuals
    Tighten the thermostat housing fasteners. Use a drive socket #10. Use a torque wrench. Tighten it to 6 nm torque.
Was this manual helpful?
Please rate this manual on a scale from 1 to 5. If you have any questions, feel free to ask us.
Users voted – 0
Need New Tyres?

Find out which tyre and wheel sizes are compatible with the AUDI TT Roadster (8N9) model

Audi TT 8N Roadster tyre size

Popular maintenance tutorials for Audi TT 8N Roadster

More manuals for Audi TT 8N Roadster

Complete guides for changing the Thermostat housing on different AUDI TT models

Unlock your car maintenance assistant!

Track expenses, manage logs, schedule replacements, and more.

DIY AUDI TT Roadster (8N9) Thermostat replacement - online guide
Tips & tricks for your AUDI TT Roadster (8N9)
View more
  • How to change Thermostat housing on AUDI TT Roadster (8N9) 3.2 VR6 quattro - replacement tricks
    Why Is the Windscreen Washer Not Spraying? Solution
    5K views
    Published on: 25/04/2025
  • Changing Thermostat valve Audi TT 8N Roadster 1.8 T - Replacement Tips
    Can You Hear Your Brakes Squeaking? Learn the Causes and DIY Solutions! | AUTODOC Tips
    7K views
    Published on: 19/01/2021
  • Maintenance Hacks - AUDI TT Roadster (8N9) 1.8 T quattro Coolant thermostat replacement guide
    Transform Your Engine Bay: Affordable Valve Cover Restoration with AUTODOC
    8K views
    Published on: 29/06/2023
  • Replace Engine coolant thermostat on Audi TT 8N Roadster - free video tips
    Deep interior cleaning | Car transformation by detailing
    7K views
    Published on: 05/09/2024

Most commonly replaced car parts on AUDI TT

Professional manuals for the most common AUDI models

ОЕ number
Autodoc CLUB App icon
Time to replace parts? Get even better deals in our Shop app.
AUDI TT Roadster (8N9) Thermostat replace by yourself - Scan QR-code and download AUTODOC CLUB app
SCAN ME