Question about Volkswagen Jetta

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94 Jetta w/2.0 engine overheats.I took it to a mechanic and he said my thermostat was fine.So what else could be causing it to overheat??And it does have a small oil leak too but I can't pin point it.

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Overheat due to insufficient water cooling. If there is a loss of cooling then there is a problem with the head gasket.
One thing to check is to take off the thermostate to run for a few days. Now it is in the summer so you would not have a problem with initial driving. If no more over heat then replace the new thermostate, it is not expensive.
While the engine is running press the upper hose to feel the water moving underneath.
If it is not then you need need to look at the repalcement of water pump and/or radiator. Pump may still working but the radiator got clogged up preventing cooling circulated. Good luck.

Posted on Aug 06, 2010

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Overheating could be anything in the cooling system. Thermostat is out, could be radiator, water pump, broken belts which cause the water pump to not move, cylinder head warped, cracked, or the cylinder head gasket.

Posted on Aug 06, 2010

  • 1 more comment 
  • bigalaskan82 Aug 06, 2010

    If it was the water pump wouldn't it be leaking water somewhere??

  • goldenglove1
    goldenglove1 Aug 06, 2010

    No, the water will not circulate, it will just lie in the coolant system.

  • bigalaskan82 Aug 06, 2010

    OK ... thank you very much!!!

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