Ac compressor whine
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This is a discussion on Ac compressor whine within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I just fixed my ac leak and charged up the system. Once the compressor kicked in I could hear a ...

  1. #1
    Registered User
    Join Date
    Dec 2011

    Ac compressor whine

    I just fixed my ac leak and charged up the system. Once the compressor kicked in I could hear a very loud squeal kind of like a belt. I replaced the idler pulley and tightened the belt well.

    The sound was still there. Upon a close look I found that the squeal is coming directly from the ac compressor clutch. I could ony hear the squeal if I have the ac on.

    The clutch (triangle) is really hard to turn by hand and gets stuck quite often.

    Could this be fixed or will a new compressor be necessary?

    Also if I do need to buy a new compressor will I need to recharge my system with r134a?


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  3. #2
    Super Moderator (Actually a SuperSpy) SD_GR's Avatar
    Join Date
    Jul 2002
    CA, US
    I Support ClubWRX
    Whenever the system is open to atmosphere, you need to pull a vacuum. This will do two things -- allow you to see that there are no further leaks and remove any atmosphere (and associated moisture etc.) from inside the system. Did you do this?

    If your belt is not an authentic Subaru I'd also suspect that.

    Your last question made me pause for a bit frankly; if you replace the compressor not only will you need to of course recharge the system but also make sure you have the correct type and amount of oil in there (right?).
    The world breaks everyone and afterward many are strong in the broken places. But those that will not break it kills. It kills the very good and the very gentle and the very brave impartially. If you are none of these you can be sure it will kill you too but there will be no special hurry. Ernest Hemingway, A Farewell to Arms, 1929
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    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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