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Thermostat question

Discussion in 'A3/S3 Forum (8L Chassis)' started by Mrt4x4, Feb 21, 2014.

  1. Mrt4x4
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    Mrt4x4 Member

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    [Feb 21, 2014]
    Only had the car 5 days, it seems to take forever to warm upto 90 them seems to rise and fall between 70-90 depending on heating controls driving style etc, this just a dodgy thermostat you think
    #1
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  3. CazzaVR
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    CazzaVR Member

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    [Feb 21, 2014]
    Sounds like it. Also worth changing the coolant temp sensor- easiest job in the world!
    #2
  4. Marshall878
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    Marshall878 Member

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    [Feb 21, 2014]
    Mine needs doing also :(

    Bleed procedure for the system? Is it worth doing a full flush and filling with new coolant?
    #3
  5. Gary_808
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    Gary_808 Member

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    [Feb 21, 2014]
    I need to do mine, never gets above 70degrees :( I have it just haven't got round to swapping it,

    Also got a new plastic bit for 3quid, thought may as well
    #4
  6. JoeeS3
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    JoeeS3 Active Member

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    [Feb 21, 2014]
    ive just done mine. its quite a fiddly job but can be done if you have small hands. try changing the cts first as thats really easy. then if that fails the thermostat. i flushed my system and filled with new coolant when i changed the thermostat as it just made more sense to do it then.
    #5
  7. Mrt4x4
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    Mrt4x4 Member

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    [Feb 21, 2014]
    Would you guys suggest changing the sensor first then, ive got warranty so wondering whats worth doing / claiming for
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  8. Mrt4x4
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    Mrt4x4 Member

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    [Feb 21, 2014]
    Also is it better to get the audi sensor for £15 or another for £6 with 12month warranty
    #7
  9. CazzaVR
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    CazzaVR Member

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    [Feb 21, 2014]
    Definitely!
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  10. bazil
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    bazil BOOM BOOM

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    [Feb 21, 2014]
    Ive been putting off doing my thermostat for 3 maybe 4 years now

    Temp doesnt move off the rest on the motorway lol
    #9
  11. CazzaVR
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    CazzaVR Member

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    [Feb 21, 2014]
    Surely that's just gonna make it run rich the whole time?
    #10
  12. Gary_808
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    Gary_808 Member

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    [Feb 21, 2014]
    Yup :( mines only been like it abit, but terrible mpg!
    #11
  13. Sam11189
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    Sam11189 Member

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    [Feb 21, 2014]
    My temp gauge is all over the place.. When I first got the car, the gauge was lifeless, didn't move, so decided ill swap the temp sensor for a new one, which fixed it for, hmm 50 miles lol so think maybe a thermostat swap is my next move, only problem is I have no f@@king clue where's it's located, anyone want to shed some light on this?
    #12
  14. Mrt4x4
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    Mrt4x4 Member

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    [Feb 21, 2014]
    Thank you all for your help greatly appreciated
    #13
  15. Mrt4x4
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    Mrt4x4 Member

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    [Feb 21, 2014]
    Where is the sensor located guessing around the expansion tank
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  16. Mrt4x4
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    Mrt4x4 Member

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    [Feb 22, 2014]
    #15
  17. Mrt4x4
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    Mrt4x4 Member

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    [Feb 25, 2014]
    Wasnt the temp sensor still drops
    #16
  18. nicko86
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    nicko86 nicko86

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    [Feb 25, 2014]
    just bought a new one for my s3, with intention of doing it myself.....its a right b***ard to get too, although only two 10mm bolts you cant do this job on your back. ive booked mine in to save the hassle, a mechanic with the right tools/surroundings will do it in 1/2 hour so worth saving me the hassle!
    #17

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