When engine warm, there is still vapor coming out of exhaust. have a leak in cooling system,can not find it. no sign of water in oil.

Asked by waterdude May 31, 2014 at 01:20 PM about the 1998 Pontiac Grand Am 4 Dr SE Sedan

Question type: Maintenance & Repair

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TopShadeTree answered 9 years ago

If no fluid ifs being lost,it may be o2 sensor.Does car have any kind of skip?

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dandyoun answered 9 years ago

Your engine coolant keeps getting low and you have to add more. If so possible head gasket issue.

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dandyoun answered 9 years ago

http://troubleshootmyvehicle.com/gm/3.1L-3.4L/blown-head-gasket-test- 1 -- check this out

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dandyoun answered 9 years ago

www.youtube.com/watch?v=NlT8U8D5vwQ -- is this what yours is doing? If so blown head gasket.

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