Smoke on start up

Discussion in 'Engine Topic' started by '77LT, Aug 25, 2010.

  1. '77LT

    '77LT Member

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    Does anyone know why a big cloud of white smoke comes out the exhaust when i first start up my car?
     
  2. second2ndgen

    second2ndgen Member

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    Is it white smoke or does it have a blue tinge to it? If its oil, your valve seals are bad, allowing oil to collect on top of your intake valves and then when you start the engine, the oil burns. This causes it to smoke on startup.

    Mike
     
  3. '77LT

    '77LT Member

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    It is just a white smoke
     
  4. High Country Z

    High Country Z Veteran Member

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    Condensation in the muffler.
     
  5. 1BAD78

    1BAD78 Veteran Member Gold Member

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    +1 on bad valve seals no doubt
     
  6. z28rod

    z28rod Veteran Member

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    valve seals
     
  7. 1BAD78

    1BAD78 Veteran Member Gold Member

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    My 1980 Chevy Pickup Does It Everytime I Start It. Doesnt Effect The Way It Drives Or Foul Plugs So I Dont Worrie About It.
     
  8. DoTheDew

    DoTheDew Veteran Member

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    Condensation somewhere in the exhaust. Lot of heat (engine) meets colder denser moist air. See it up here in the winter all the time, starting late fall, lasting until spring. Hot summer nights though you'll never see a hint. If its a lot of white smoke, like it never stops, regardless of exhaust or engine temps, and smells sweet, it could be antifreeze from a head gasket leaking.
     
  9. sooner

    sooner Veteran Member Lifetime Gold Member

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    valve seals.

    Just think of it as a little extra upper cylinder lube :)
     
  10. 74Lt1

    74Lt1 Veteran Member

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    I would say that its valve seals, but if im correct then a blown head gasket can cause like a white steam to come out of the exhaust but i think that it does it even after start up...
     

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