Remanufactured A6 Compressor Came with Oil

[Pat K.]

I decided to check if it had oil and there was a lot that poured out. Old Air has no idea which oil is in there because they purchase the compressors from another vendor. He suggested I drain the oil completely and put in the mineral oil.

[Dick W.]

Re: Remanufactured A6 Compressor Came with Oil

There will not be enough residue, after you drain it, to cause any problems

[Pat K.]

Re: Remanufactured A6 Compressor Came with Oil

That's what I thought, but I just wanted to be sure, thanks!

[Larry M.]

Re: Remanufactured A6 Compressor Came with Oil

There will not be enough residue, after you drain it, to cause any problems

Agree with Dick.

Larry

[Ray G.]

Re: Remanufactured A6 Compressor Came with Oil

Hello;
Additionally drain and fill with mineral oil twice, and turn the compressor 30 revolutions by hand (on the bench) after each fill.
Ray

[Tom L.]

Re: Remanufactured A6 Compressor Came with Oil

Are you using R-12 or 134a? The only reason to drain and change the oil would to confirm that it's PAG. PAG is reverse compatable with all refrigerants unlike mineral oil and alkylbenzene (the third choice for oil used in commercial refrigeration), it wil work fine with R-12. Also, you will allow you to easily convert to 134a in the future as long as you use the correct O-rings now, contrary to what peple say R-12 won't be around forvever. Good luck!!

[Pat K.]

Re: Remanufactured A6 Compressor Came with Oil

I'm using R12.

[Larry M.]

Re: Remanufactured A6 Compressor Came with Oil

Are you using R-12 or 134a? The only reason to drain and change the oil would to confirm that it's PAG. PAG is reverse compatable with all refrigerants unlike mineral oil and alkylbenzene (the third choice for oil used in commercial refrigeration), it wil work fine with R-12. Also, you will allow you to easily convert to 134a in the future as long as you use the correct O-rings now, contrary to what peple say R-12 won't be around forvever. Good luck!!

Lynn:

Not certain that all PAG oils are compatible with R12, although it appears that some MAY be okay to use. See attached link: http://www.autoacforum.com/messagevi...threadid=17132

ESTER oil can be used in both R12 and R134a systems, and will tolerate some contamination with (residual) mineral oil.

But for Pat, why take a chance? He should drain any replacement oil and install the same oil that will be used to charge and maintain his system. Then he KNOWS what he has.

Larry

[Tom L.]

Re: Remanufactured A6 Compressor Came with Oil

Hey Larry, you learn something every day. Over the last 2 decades the commercial refrigeration industry has gone through changes that the auto A/C industry couldn't imagine, it's a real mess out there. Anyway, with the commercial end being my focus there have been many misunderstandings and "made up" names for refrigerants and the materials associated with them. Example: What is "Freon"? It's a Dupont trademark that exclusively refers Dupont manufactured CFC and HCFC refrigerants, period. People use the term for many things that they are not.

When it comes to oils there is a similar issue. Polyolester is often referred to as Poly, Ester, POE and several trade or brand names. Here's where it falls apart, I ASSUMED (big mistake) that PAG was someone elses name for good ol' Polyolester. Seems that's not the case.


So here's what I've learned PAG is the oil exclusevely used in auto a/c systems. But why? POE works great with 134a! Unless someone can dispute it, which is fine, it's all ablout $$$. A gallon of PAG Costs about $56, an internet price. POE is about $90 at my cost ($155 list). Me thinks the auto industry chose PAG because of the bean counters, POE is a superrior product.


Now that I've cleared that up, in my mind at least, here's what I would do. Use POE for a lubricant, charge with R-12 and use it until you find that R-12 is no longer easily accessible. No further retrofitting required.


I'll go hide in the freezer now, sometimes I'm more comfortable there. Have fun!!

[Domenic T.]

Re: Remanufactured A6 Compressor Came with Oil

I thought I would throw in a tid bit or two about A-6 compressors.

First of all I'm not good at putting names to 3 letter oils, it has to be spelled out or I can make a mistake.

My shop is tooled up to do A-6 compressors and it wasn't till I recieved NCRS compressors that I saw the lower compression dished pistons (SEE PIC) that were in known mid year vette compressors.

All the others I have seen come out of passenger cars are flat tops.

That and the pulley ratio must have been calculated for the RPM.

There are a 100 ways to cut corners that shops use when so called rebuilding and I have seen them all.

Also the cast rings are being replaced with tefflon, (kinda like the new inexpensive home air compressors) The pic shows the 2 style piston types and rings.

Here are 2 piston sets, one with the cast ring and the other with a NEW tefflon ring that hasn't been stretched in place.

I think Joe lucia may be the only one here to figure out the dish piston application by part #, I am only guessing.

DOM

[Tom L.]

Re: Remanufactured A6 Compressor Came with Oil

Dominick, Have you noticed a diffrence in valve plate design in compressors with different pistons? Just wondering.

[Domenic T.]

Re: Remanufactured A6 Compressor Came with Oil

Lynn,
No I haven't, the thin valve plates all seem to be the same.

Were you refering to the dish pistons or the difference in cast ring vs tefflon?

DOM

Dominick, Have you noticed a diffrence in valve plate design in compressors with different pistons? Just wondering.

[Ray G.]

Re: Remanufactured A6 Compressor Came with Oil

I thought I would throw in a tid bit or two about A-6 compressors.

First of all I'm not good at putting names to 3 letter oils, it has to be spelled out or I can make a mistake.

My shop is tooled up to do A-6 compressors and it wasn't till I recieved NCRS compressors that I saw the lower compression dished pistons (SEE PIC) that were in known mid year vette compressors.

All the others I have seen come out of passenger cars are flat tops.

That and the pulley ratio must have been calculated for the RPM.

There are a 100 ways to cut corners that shops use when so called rebuilding and I have seen them all.

Also the cast rings are being replaced with tefflon, (kinda like the new inexpensive home air compressors) The pic shows the 2 style piston types and rings.

Here are 2 piston sets, one with the cast ring and the other with a NEW tefflon ring that hasn't been stretched in place.

I think Joe lucia may be the only one here to figure out the dish piston application by part #, I am only guessing.

DOM

Hello DOM;
Is your experience the dished piston sets were only installed on Corvettes.
Interesting. Saved used A6s for parts for years. Wish I hadn't thrown out the used "gut packs"
Would be good reference material now.
Ray

[Domenic T.]

Re: Remanufactured A6 Compressor Came with Oil

Ray,
The first dish pistons I saw were on C2 vettes. All the others I did that had the flat top were on passenger cars or ones that were on vettes that had exchanged compressors.

DOM

[Ray G.]

Re: Remanufactured A6 Compressor Came with Oil

Ray,
The first dish pistons I saw were on C2 vettes. All the others I did that had the flat top were on passenger cars or ones that were on vettes that had exchanged compressors.

DOM

Hello Dom;
Do you think the design change is a result of expected higher RPM, smaller passenger compartment, a combination of both, or additional information?
Ray