| Sanden vs A6 compressor [message #122338] |
Tue, 19 April 2011 12:08  |
Rick Williams
Messages: 256
Registered: July 2004
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I just read Michael's post about what he learned at Patterson so I thought I would start a discussion about rebuilding the a/c system. I am curious about Ken H's discussion. I know he is using a Sanden clone.
The A6 is a large compressor at 207cc. There are some Sandens that are 160cc but there are others that are much smaller. What size have people used?
My A6 has a front end leak and a noisy clutch. I would just as soon try a new replacement as to spend time and money rebuilding it. The Sanden SD7H15 is 155cc. It is available with a GM hose fitting.
The Sanden comes filled with Sanden SP-15 PAG oil. It has a viscosity of 80 cSt at 40 deg. C. Sanden says to use only Sanden oil. PAG oil varies in viscosity. GM Goodwrench PAG 150 oil comes from Dow just as Sanden does and is chemically the same except for viscosity. How important is the viscosity issue?
My system has had both R12 and 134 refrigerants and mixed oil. So I will need to flush the system. I have read that it is ok to use mineral spirits as a flush. I have also read not to use it and to only use a/c flush solvent. Opinions welcome.
I know that I have to replace the accumulator and remove the expansion valve before flushing but should I replace the expansion valve? With everything made in China these days and given some of the experiences that I have had with Chinese auto parts, my first thought is to reuse the expansion valve. Can it be cleaned effectively? I have no idea what I will find when I start flushing. I find references to "Black Death", the resulting goo of mixing mineral oil and R12 with PAG or ester oil and 134. What is the total oil quantity requirement for our system?
I will be using Duracool.
Thanks to all of you for your help.
Rick
Rick Williams
Bliss, Michigan
1978 Eleganza II
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