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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1995 GMC Suburban 1500 Question: a/c compressor
Answer #1patrick mannion from Greg Solow's Engine Room, January 24, 2010, 13:55Master
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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.
Answer #2WHM May 27, 2010, 18:16Rookie
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.