Question about 2002 Jeep Grand Cherokee

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White exhaust vapors

My check engine light came on yesterday evening (1/01/09), but runs fine. This has happened before, and it's never been a problem. I've always had it checked and reset by the dealer. This morning (1/02/09) however, when I started it up and started driving off to work. I noticed an excessive amount of white vapor from the exhaust. It happened again when leaving work. It does go away once the engine reaches it's max running temp. Anyone got any answers?

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  • austinaiu Jan 03, 2009

    Hey guys. Thanks for the info on my problem. I took it into my mechanic's shop this morning (1/03) and unfortunately, it was the head gasket already blown. They took a sample of the vapors and did a fluid test to see what was causing the white smoke. And they determined that the head gasket had blown. I had my heater core replaced in the spring, because it had redlined. But they said whoever did the revision probably did not check the head gasket to see if there was any seepage into the engine. Now I have to have the top half of the block rebuilt. So if anyone ever runs into a heater core problem, make sure to have the head gasket checked also.

  • Phil Goncalves May 11, 2010

    Have you checked the coolant level? and the engine oil? do you know what the code was when you took it to the dealer? how much white vapour did you actually see and what is the outside temperature? sometimes in extreme cold weather you will get more white vapour than usual. this could also be the beggining of a coolant leak.



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Possibly a head gasket going out thats what it sounds like

Posted on Jan 03, 2009


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