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Thread: white smoke when accelerating

  1. #1
    Join Date
    Jan 2013
    Location
    Raleigh, NC
    Posts
    57
    My Cars
    1997 540I

    white smoke when accelerating

    When I press on my gas real hard a puff of white smoke comes from my exhaust. I put Seafoam in my crankcase and drove about 150 miles and changed my oil. I doubt that would be the problem now. I put Seafoam in my other BMW's and did not have this problem.

    It only smokes when I press hard on the gas.

    I did the following repairs.

    Replace all ignition coils and spark plugs

    New valve cover with gasket

    6 New fuel injectors

    4 new oxygen sensors
    new breather hose
    All parts are genuine BMW parts.

    Any ideas?

  2. #2
    Join Date
    Jul 2008
    Location
    Osnabrock, ND
    Posts
    961
    My Cars
    2004 325xi,2004 545i SMG
    white smoke typically indicates coolant... but not always
    black smoke is usually fuel
    bluish smoke is usually oil.

    does car use coolant?

    now, you said white smoke are you sure its not just steam, when you press hard on accelerator my car will "get rid" of the condensation in the mufflers and such in form of water vapor and steam like vapor.
    Level 1 Certified BMW tech.

  3. #3
    Join Date
    Nov 2019
    Location
    Salt Lake City, UT
    Posts
    32
    My Cars
    '00 Z3, '08 535i
    If you are pressing hard on the gas pedal, it’s most likely the turbos... when they on on their way out they burn oil and gives you the white plumes of smoke only when accelerating hard-ish.

    How many miles does your car have? Turbos need replacing about 100k or so depending on driving style.

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