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  1. #1
    macpdm's Avatar
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    Puzzled by engine temp

    I am puzzled by the engine temp of my AUM engined A3 1.8T sport.The temp guage never seems to get very high during my 15minute journey to work but in traffic or on a warmer day it will eventually rise to 90 dead centre of the dial and go no further, the engine does not overheat.The heater is fine it gets plenty hot and I have felt the top and bottom hoses.The bottom hose feels cooler than the top in my opinion.I changed the temp sender this being a simple job thinking this could be the problem but no it wasnt that but I now know the temp guage is reading correctly.Is the thermostat buggered ?

    Thoughts & advice appreciated.

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  3. #2
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    i had this on mine - on motorways or just cruising the temp would never really get above 70, when sat in traffic then it would hit 90 like it should then stay there till i got moving again and it cooled down.

    they should take 5-10 mins or so to get to 90 then stay there permanently - if its not getting hot quickly then it sounds like thermostat. i changed it on mine and it fixed it immediately!
    97 Green 1.8T - Stage 1 R-Tech map - SOLD

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  4. #3
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    Change the thermostat as it is likely to be stuck open or broken. In traffic there will be very little airflow through the radiator to cool the coolant and the temperature will therefore rise quicker. If you are on the motorway/road driving at a reasonable speed then there will be plenty of airflow which will cool the coolant and if the thermostat is constantly open then the temperature gauge isn't going to rise very far.

  5. #4
    macpdm's Avatar
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    Cheers guys

 

 

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