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  1. #1
    Senior Member Two Rings NoFlyZone's Avatar
    Join Date
    Aug 04 2005
    AZ Member #
    7490
    My Garage
    89 Mirage Turbo, Audi A6 4.2
    Location
    San Jose, Ca

    AC Compressor replacement

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    I have a few questions regarding a AC compressor change. I've installed a rebuilt compressor and purchased a receiver/dryer as well. The receiver dryer did not have the neccesary bracketing so I'm returning it. Question is this. Do I need to replace the receiver-dryer in the first place? I was informed to do so. Another question I have is should I somehow flush the system? If so, how and with what? Is it worth DIY a refill of the system (I have the recharge kit but not the fittings) to get a proper charge?

    Thanks for your comments

  2. #2
    Veteran Member Four Rings offroader1006's Avatar
    Join Date
    Oct 17 2004
    AZ Member #
    3830
    My Garage
    98.5 1.8TQM Sport
    Location
    Columbia, SC
    Items for Sale

    Re: AC Compressor replacement

    ok first of all, put down your tools until you've read this entirely.

    If you have already opened your AC system i hope you recovered the system. if not you've let a lot of refrigerant into the atmosphere.

    Secondly, anytime you open an AC line you introduce moisture, and it is a good idea to replace the receiver/dryer/accumulator.


    If you are going to DIY, read this, if not, take it to a shop.


    After you install all your new parts you are going to need to vacuum the system down and remove all the air from the system.

    You really need to have R-134 AC gauges and a digital scale so you can regulate the amount of refrigerant, as some systems will not operate correctly or cool at all, if they are overcharged.

    When you switch from the vacuum machine to the manifold gauges, the schrader valve can open due to the high vacuum in the system, so switch them quickly. dont go eat a sandwich and come back to hook up the gauges.

    Charge with the correct weight of R-134, i cant remember it exactly, and check your AC with a thermometer. it should cool to 33-43 deg. depending on the ambient temp.
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  3. #3
    Senior Member Two Rings NoFlyZone's Avatar
    Join Date
    Aug 04 2005
    AZ Member #
    7490
    My Garage
    89 Mirage Turbo, Audi A6 4.2
    Location
    San Jose, Ca

    Re: AC Compressor replacement

    Thank you for that information.

    I am replacing the receiver dryer. It was open to atmosphere and I wish to "flush" the system. I'm trying to get the courage-faith-balls-trust, to have a so called expert refill the system. I won't go to a dealer.

    Anyone know where there's a competent AC guy in Northern California?
    Perhaps again, I'll do it myself



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