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Thread: Smoke when ac is turned on

  1. #1
    Join Date
    Aug 2017
    Location
    Utah
    Posts
    2
    My Cars
    E46 330ci

    Smoke when ac is turned on

    Every time I go to turn on my air conditioning on my 2002 330ci, a couple minutes later it starts to smoke. I wanted to see if anyone else was having this problem and if they had a fix or could at least diagnose my problem, Thank you.

  2. #2
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    Where is the smoke emitting from, specifically?

  3. #3
    Join Date
    Aug 2017
    Location
    Utah
    Posts
    2
    My Cars
    E46 330ci
    Next to the postive terminal under the hood.

  4. #4
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    I would have to be there to try and diagnose, to many variables.
    Have a trusted mechanic examine, give their diagnosis and estimate,
    then post back with results.

  5. #5
    Join Date
    Jan 2016
    Location
    Honolulu,Hawaii,USA
    Posts
    4
    My Cars
    2004 BMW 325i
    I have a similar smoking problem and thought it was my valve cover gasket, so I replaced it and still having the same thing happen after a few minutes of turning on the engine.

  6. #6
    Join Date
    Nov 2011
    Location
    trowbridge,wiltshire,UK
    Posts
    15
    My Cars
    1986 635
    Make sure it is "smoke". if the interior of the car is warm and humid, cold air from the AC unit can cause condensation - fog - which looks like white smoke. (that is inside the veihcle)
    Under the hood, you can get the same effect if there is a high pressure leak in that area. what colour is it and does it smell?

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