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A/C conversion and Esther, PAG and POE oils

posted by  Volvony on  Wed Mar 1 14:17 CST 2006
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last visit: Sun Jul 6 08:57 CST 2014
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I converted the R-12 system of a 1990 740 to R-134 using the Volvo kit which included a bottle of ester oil. After various other problems including replacing the compressor, the system worked again until the condensor blew a leak. I took the car to a shop and they found the leak. They also told me that ester oil is not to be used with R-134 and now they want to flush the entire system out.(139.95) If this is true about Esther oil, then why would Volvo include it in a conversion kit? What are PAG and POE oils? Are they the right oil with R134? Should I disregard this and just put in the new condesor with a dose of ester oil to replace what was in the old one? Thanks for ending this confusion






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