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Why do variable displacement compressors go bad


daxter1987

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So I decided to take apart an AC compressor out of a Land Rover. The compressor is a SANDEN compressor and it is a very common component to go bad. The OE compressor from land Rover is outrageouly expensive, over 1000 dollars for the complete bill. So I decided to take an old one apart I replaced, take some photos and figure out why they go bad. Here is a link to the pics:

http://www.jaghelp.com/2013/08/variable-displacement-sanden-compressors.html

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Alternatively, since you have a clutch as well, you can just jam the displacement at one setting. Then the AC works just fine - even if it looses a little economy. Sometimes this also makes the climate control a bit fearce / not work in terms of being able to select & hold an exact temperature. However, just on / off works OK.

Si

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