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S3 overheating help please!

Discussion in 'A3/S3 Forum (8L Chassis)' started by stuart_tate41, May 5, 2013.

  1. stuart_tate41

    stuart_tate41 Member

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    Hi guys,

    over the last few days every time I've been out in the car I've had a coolant temp warning come up. The dash display creeps up to 110/120 on the dash, it drops back to 90 within about 20-30 seconds.

    I've changed the temp sensor, I've check a return flow to the expansion tank.

    Today I set the climate control to show engine coolant temp (51). It started off at about 14 and settled at 75. Driving home I noticed the dash temp gauge rise to 100 however the climate controll stayed on 75.

    Any ideas on the problem!?
     
    #1 stuart_tate41, May 5, 2013
    Last edited: May 5, 2013
  2. harps21k

    harps21k Member

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    I thought the climate display was 49 for coolant temp? Might be wrong...
     
  3. stuart_tate41

    stuart_tate41 Member

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    49 Malfunction counter for speedometer (vehicle speed) signal

    Is on the guide I found?
     
  4. Alex C

    Alex C Well-Known Member
    VCDS Map User

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    its 51 for coolant
     
  5. stuart_tate41

    stuart_tate41 Member

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    Any idea on the problem Alex?

    I doubt it's the water pump as there is a return flow, new temp sensor as well. So thermostat or clocks?
     
  6. Goubo1

    Goubo1 Active Member

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    My pre facelift s3 it's 49c for coolant and 51c for oil temp
     
  7. Broken Byzan

    Broken Byzan Photographic Moderator
    Staff Member Moderator VCDS Map User

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    Was the CTS a genuine one?

    Because it seems as the unit is giving the dash one figure and the ECU another.
     
  8. hades-

    hades- Yorkshire & Humber Rep.
    Regional Rep VCDS Map User

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    as above the aftermarket sensors either dont work or **** up quick
     
  9. stuart_tate41

    stuart_tate41 Member

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    Non genuine sensor but brand new on yesterday!
     
  10. Goubo1

    Goubo1 Active Member

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    I bought a eBay coolant sensor and never worked correctly from the start,bought a genuine audi part and its been spot on since
     
  11. stuart_tate41

    stuart_tate41 Member

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    We'll its from know motor factor and its doing exactly the same as the audi part I removed. Just find it had to believe that a brand new part doesn't work!
     
  12. hades-

    hades- Yorkshire & Humber Rep.
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    quite alot of aftermarket parts dont work as they should
    have you checked the wireing etc
    have you scanned for fault codes ?
     
  13. stuart_tate41

    stuart_tate41 Member

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    Not scanned it yet, all wireing looks to be okay. Could it be the thermostat?
     
  14. JUS3IN

    JUS3IN polishing a silver turd

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    get an obd 2 cable off ebay for 6 quid an download the free vcds-lite software from ross-tech best 6 quid you'll ever spend then the car will tell you whats wrong...
     
  15. stuart_tate41

    stuart_tate41 Member

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    So right now having the cambelt and water pump changed!

    Took it back to the dealer hes doing the water pump FOC and I'm paying cost of parts for the cambelt. RESULT
     
  16. stuart_tate41

    stuart_tate41 Member

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    Should be getting it back today woo!
     
  17. stuart_tate41

    stuart_tate41 Member

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    Got it back no new water pump ,cambelt and aux belt. Lovely did a 250 mile trip the other day no overheating at all!
     

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