Question about 1999 Pontiac Sunfire

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Low coolant light was going on and off...filled coolant...puddle of coolant under car...can't see leak anywhere. Head gasket was changed about a year ago...also replaced hose thought to be source of leak about a year ago...now coolant leaking again???

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  • CarySchroeder May 11, 2010

    Could be from many sources. Assume you have checked the main hoses. Is it from front or rear of engine compartment? Check: Water pump heater hoses radiator (this should be a leak in the front.) freeze plugs Is it a small leak or a large leak? Does it leak when engine cold, just sitting there, or only when engine running, engine hot? Does leak change when the heater is on or off?

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  • Pontiac Master
  • 4,349 Answers

There could be a leak, to find out you must pressure test the cooling system. Also test the cap.

Posted on Sep 28, 2009

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check the oil for moisture.
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