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r-4 compressor

Turbo on Tue May 25, 2010 7:59 PM User is offline

Does anyone know why there are two different displacement r-4 compressors? I have seen a 10 cu/in and a 11 cu/in compressor. Does anyone know how to tell the difference?

GM Tech on Wed May 26, 2010 7:01 AM User is offline

Its molded into the casting on rear of pump-- but it is of no real significance- 99% of installs would not notice any differences..

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Turbo on Wed May 26, 2010 4:31 PM User is offline

Thank you.

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