air conditioning system

Discussion in 'General Motoring' started by callipygian, Jul 17, 2004.

  1. callipygian

    callipygian Guest

    I own a 1992 Saturn SL1. My air conditioning has gone out one me. I
    figured out that it was low on refrigerant and that was causing the
    problems, but when I tried to recharge it (R134a), the refrigerant didn't
    stay in the system. The pressure gauge showed no pressure, even after 3
    cans! And, the low pressure hose wasn't getting cold like it should. We
    checked the hoses for leaks and found none. So I was wondering if it
    could possibly be a problem with the air compressor? Any ideas you could
    give me would help tremendously. Thanks
    callipygian, Jul 17, 2004
  2. callipygian

    Ritz Guest

    2 things.

    1. Your system isn't charged with 134a. It was originally charged with
    R12. They don't mix.

    2. There's obviously a leak in the system. Fix the leak and THEN
    recharge the system.

    In order to convert to 134a (it's illegal to recharge it with R12 unless
    you're the owner and have a private stash of R12), you'll need to change
    the receiver/drier, completely evacuate the system with a vacuum pump,
    add a few ounces of ester oil lubricant (compatible with both R12 and
    R134a), and THEN add R134a refrigerant. I forget exactly how much of a
    charge the early Saturn systems take, but you'll want to have about
    30-35psi on the low side and 170-190psi on the high side. That should
    give you a temperature drop of 25-30 degrees below ambient.

    I don't read this group much anymore (mostly due to schmucks like Steve
    Scharf who fill it with senseless noise), but if you have any questions,
    send me email.

    Ritz, Jul 18, 2004
  3. callipygian

    James1549 Guest

    Even if your compressor is bad, you still should have had some kind of pressure
    after adding 3 cans. Obviously you have a leak. If you couldn't find it under
    the hood, maybe it is in the evaperator, in the dash.

    James1549, Jul 18, 2004
  4. callipygian

    callipygian Guest

    Well, first of all, my system has been converted to R-134a already so
    that's not something I have to worry about. Secondly, I knew the
    refrigerant was leaking out somewhere, I just kind of needed some idea on
    where to look, because I couldn't find any on the hoses anywhere. I just
    wondered about other places a leak could be found. Any ideas guys?
    callipygian, Jul 27, 2004
  5. callipygian

    Ritz Guest

    Inject some UV dye, then park it in a dark garage and use a UV light to
    look for the glow. It could be almost O-ring, a hose,
    shaft seal on the compressor, a puncture in the evaporator or condensor,
    Ritz, Jul 27, 2004
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