Engine Size: 466
Refrigerant Type: R12
Ambient Temp: 90
Country of Origin: United States
I want to know if anyone here has had experience using an aftermarket A6 replacement compressor. I have heard of or read about too many front seal leaks/failures with using a remanned or even a new A6 compressor . I was looking at the Coolpro S6 and the Pro6ten compressors. I have a new remanned unit but I am leary of having front seal problems/losing my R12. Please advise, with good or bad experiences. Thank you, Todd
It is possible to replace the 2 piece ceramic shaft seal in your A6 with a double lip neoprene seal. In 'many" cases it solves or prempts oil slinging and refrigerant loss in used, reman or even New units. I installed them in every A6 that I touched, even new and reman units, for quite a while. (I learned about the seal conversion here on this Forum, BTW. )
However, good (resealable) used units are rare these days. Quality remans are getting hard to find and the quality of new units is dropping every day, or so it seems. Even the neoprene seal upgrade is getting to be a crapshoot for reliability.
I've always been a big fan of the rugged, venerable A6 and touted it's virtues to my customers and on many automotive forums when the general consensus of the group was to modify the mounting and replace it with a 508 Sanden or other compressor. I always tried to keep an A6 on customer cars.
I fought the good fight, but then I tried the Sanden based Pro6Ten compressor as a test, just to satisfy my curiosity. That was in 2008 on a 72 Olds Cutlass. That system is still working like new with no service since I assembled it. It is driven a lot in the summer and parked all winter.
Since then, I've installed 6 Pro6Ten compressors on customer vehicles with ZERO problems to date. Some were R12, some R134a. Some had condenser upgrades, some not.
As much as I hate to say it, I think it is a good move to replace an A6 with a Pro6Ten. Early on, there were some issues with cracking around the mounting points, bit that seems to have been resolved for quite some time now. I've never seen it on any of "mine".
As for the Nippondenso (10P15x?) based S-6, I've never used one. I plan to install one on my daughters 78 El Camino as a test some time this summer. 'Denso compressors are very reliable so I don't foresee any issues with it. The S6 is a newer offering to the market, so reliability info is almost non-existant as far as I can find.
Hope this helps, even a little bit.
Edited: Fri June 29, 2012 at 10:44 PM by newton5
Thank you for the reply. It is extremely helpful having someone, such as yourself, with experience in dealing with these A6 leak issues. I agree with you on the virtues of the A6, but the oil leaks are starting to become too common and too costly. I really appreciate your recommendations and first hand knowledge with dealing with these newer A6 replacement compressors. I will also use an originally designed, but new condenser for my system so it is good to hear it's use doesn't handicap the newer compressor's cooling abilities, especially when used with R-12. Did you have any fitament issues with the Pro6ten compressors, brackets or port locations? How does the Pro6ten compare with the cooling abilities of the original A6? I have seen a performance data sheet for the Coolpro S6 vs. A6 but not the Pro6ten, I do not know how true this data is though. Thank you very much for your reply, it was much more than a "little bit" helpful to me. Todd
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