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Old 07-07-1999, 02:24 AM
Registered User
Join Date: Jul 1999
Location: Los Angeles, Ca.
Posts: 21

I'm planning to change-over the A/C system in my SLC to R134a (leaking compressor). I already have a new compressor, expando-valve, temp-switch and rec/drier. I'm planning on doing the job myself. Very ambitous no doubt - I'm good with wrenches.

I've already got the R12 recovered and am ready to proceed, short a few lingering questions.

PAG oil or POE oil. The retro-kit I got has POE oil. Manufacturer of compressor says PAG oil. If so, which viscosity ?

What's the big difference between PAG and POE.

How do you keep the compressor from clobbering the tranny line underneath ? From the looks of it, the compressor/carrier may just lean-up against the block and sub-frame to the outside and not 'drop' onto my tranny line. Is this correct ?

Thanks for all replies.

Steve Guilford

107 024 12 011890

P.S. Anybody else think SLC are a sleeping classic waiting to wake up ?

Old 07-07-1999, 09:51 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
To take out the compressor, you will have to take out the radiator and the fan and such. It will come out the top and front of the car. For the oil you can go to the dealer and get it. All dealers cary the recommended oil.


Old 07-08-1999, 09:52 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Most cars built before 1981 don't have hoses that can hold R134a. All rubber hoses should be replaced before retro-fitting with R134a. Most all replacement hoses have the inner "barrier" needed to withstand the pressure.

G.M. reccomends only ISO "150" pag oil for A6 & R4 compressors. Note M.B. sells only one weight oil & that is WRONG!! Nipp compressors need ISO 46 weight oil. Both of these are for R134a only. "Double end-capped" pag oil is the best.

[This message has been edited by M.B.DOC (edited 07-08-1999).]
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