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1995 GMC Suburban 1500 Question: a/c compressor

 

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naterater2000, 5.7L V8, Burlington, KY, January 24, 2010, 08:53
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Do I need any special tooling to change the a/c compressor, Im going to do it myself and then take it to get charged. Also, is there anything to watch out for or take special attention to while doing it, I know the system isn't charged, so I dont have to worry about freon, just trying to get things lined up to do it over my days off.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, January 24, 2010, 10:55
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    Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_infoThere is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You get a one year subscription to year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual. http://bit.ly/alldata_repair_manuals or try http://bit.ly/mitchell_repair_manuals_online and get an online repair manual subscription.
    If the system has been with out refrigerant for a while the dryer should be replaced as moisture will be in the system. The system should be flushed out to ensure no debris is in the system, the system should then have a vacuum drawn in the system to ensure it has no leaks and the recharged.

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  • Answer #2

    WHM May 27, 2010, 15:16
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    To actually change the compressor all you need is a few metric wrenches and sockets. I always change the orfice tube, and you actually need to use line wrenches to prevent rounding the nuts. You need to put, per O'Reilly's fluid book, on the new Murray A/C compressor I am putting on my wife's 1995 Burb, 11 ounces of PAG-150 prior to fire up. I bought a clutch-hub turning tool to turn the compressor at, least 60 times, before installing it on vehicle. For safety and ease, if you don't have one, you should purchase the Tensioner Tool to remove the belt. It makes it much easier. It is about $30 at the local store.

    The poor excuse for a compressor that GM uses, the pancake, will not last long. This will be the fourth compressor in 7 years since my wife has owned this vehicle.

    Be sure to put the oil in the new compressor and turn it before cranking. This was true back in the 70's on the big compressors.

    Clean your lines if the old compressor shelled out. Disconnect the back unit if so equipped, spend the money for the line flushing kits, and flush all lines, and back air handler. You have to remove the expansion valve. If your old compressor shelled, you may want to put a new valve on, so the metal fragments do not get back in the system.

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