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Question: what causes bluish smoke from exhaust

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missbubbagump, 3.0L V6, Wicomico, VA, December 14, 2011, 22:47
 Rookie

i just put in a new torque converter,trans seal,trans gasket and new head gaskets.what is causing this bluish smoke

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, December 14, 2011, 23:13
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     Master

    Light colored smoke out the exhaust is normal until the engine warms up, especially noticeable on cold mornings dense air. Blueish/gray smoke is a sign an engine is "burning oil", excessive black smoke would be a sign an engine is running to rich/too much fuel is entering the engine. White steam perhaps noticed with a slightly sweet odor from the exhaust, rough engine running, over heating and or coolant loss would be a sign of a blown or mildly blown head gasket.

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    missbubbagump, December 15, 2011, 05:44
     Rookie

    it runs good but i look like the beverely hillbillies going down the road with a trail of smoke behind me.its alot of smoke.but i havent driven it far since i did all the work to it.do u think if i drive it a bit it will all burn off.

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    bsipla, May 27, 2012, 14:32
     Rookie

    the 3.0 misubishi engine which is the engine in your caravan has had problems with oil burn and blue smoke. only thing that will resolve the issue is to remove the heads and replace the valve guides and seals or get a set of reconditioned heads and have them installed with all new gaskets, head bolts and timing belt. I do recomend to have the compression checked and verified to be good your anything less then 10% loss from lowest compression to highest compression is acceptable and would not be the cause of smoke. also check the price of a rebuilt engine. labor and parts deference between head job and complete engine are about 800 to 1000. hope this helps

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  • Answer #2

    Greg's Orange Auto (8410 Answers) , Orange, CA - (714) 361-9355
    globalhelper December 15, 2011, 07:05
     Master

    BLU SMOKE IS A GOOD SIGN OF BURNING OIL. DEPENDING ON MILEAGE OIL MAY BE GOING BY THE VALVE SEALS WHEN SITTING OVERNIGHT. DRIVE IT A SHORT DISTANCE AND SEE IF IT CLEARS UP.IF NOT YOU MAY HAVE OTHR ISSUES. IV SEEN THIS IN HIGH MILE 3.0L

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