Question about 1998 Audi A4

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A coolant leak that seems to happen sometimes. It seems to be using a lot of coolant without leaving any kind of puddle, except sometimes. I just caught it "dumping" after a short drive. It has been unseasonably hot. If I am standing in front of the car, it is coming from the left hand side of the car (opposite side of over flow) from bottom. It is a 1998 A4 with 128k miles. Please tell me I have not cracked the engine block.

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  • lwspear Oct 15, 2010

    Radiator cap or overflow fill cap? The radiator is pretty well hidden and I didn't even think it had a radiator cap.

  • lwspear Oct 15, 2010

    I took it to a mechanic and the leak is coming from the sensor. $60 takes care of it.

  • lwspear Oct 15, 2010

    Not really, but cleared up some things i was confused about regarding cooling systems.

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  • Audi Master
  • 17,129 Answers

No, This does not look as though the enigne block is craked or else your car wont run smooth. This is a case of the radiator pressure cap being faulty. The water seems to boils up and goes out as the pressure cap is gone soft.
You must take the pressure cap after the engien is cold and replace.
Now make sure the engine is not over heating , if so there are many other issues to check.
Your radiator may be blocked reducing the cooling intensity.
Your radiator can have very small pores of leak that can also reduced the sealed system to pressure out.
Your engine timing tuning can be faulty to set the engine work inefficiently.... check the timing/tuning
Your fan must be checked for performance.
make sure there is also no hindrance of any objects to the radiator.

Posted on Oct 15, 2010

  • Donald DCruz
    Donald DCruz Oct 15, 2010

    For the coolant water to over flow from the overflow tank, it must be a reason that the water is heating to steam up . hence check if the temperature is exceeding the limit, if so the engine might be just overtimed. It seems that a scan might be needed to check the parameters or error codes to confirm the status of the engine.

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