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Thread: Slight A/C compressor whine when A/C is off

  1. #1
    Join Date
    Jan 2018
    Location
    California
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    19
    My Cars
    E36

    Slight A/C compressor whine when A/C is off

    I'm trying to troubleshoot a whine that's coming from my A/C compressor area. It's a slight whine that I hear at idle with the A/C off. It goes away as soon as I engage the A/C or raise the revs a little. It does not increase with RPMs.

    I searched and found some different potential problems like the bearing or pulley but don't know enough to understand which.

  2. #2
    Join Date
    Jun 2010
    Location
    NY
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    9,079
    My Cars
    1997 328i
    If they've never been done, then do both.
    Attn. NEWBIES: Use the search feature, 98% has already been discussed.
    Click the search button, select "search single content type", select the "e36 sub forum" specifically, try the "search titles" then try the "search entire posts".

  3. #3
    Join Date
    Jan 2018
    Location
    California
    Posts
    19
    My Cars
    E36
    Quote Originally Posted by Eric93se View Post
    If they've never been done, then do both.
    Thanks, I think the tensioner pulley has been done. I'd like to know the cause though before I start anything, and costs.

    Sent from my Nexus 5X using Tapatalk

  4. #4
    Join Date
    Jan 2018
    Location
    California
    Posts
    19
    My Cars
    E36
    Turns out some belt dressing fixed it. Glad I persisted, a mechanic was trying to sell me on the idea that it was bearings in the A/C compressor.

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