Automotive Air Conditioning Information Forum (Archives)

cw43 on Mon October 08, 2012 5:39 PM

Year: 1971
Make: Olds
Model: Cutlass
Engine Size: 455
Refrigerant Type: r-12
Ambient Temp: 80
Country of Origin: United States

I had the AC hose from behind the A-6 compressor break and discharged everything under the hood at 75mph. I cannot find the specs on how much oil to add back to the system. Also, for some reason the clutch burned up at the same time I believe. Does anyone happen to know how much oil to put back in each component? I plan on changing the dryer and flushing the evap and condensor just in case. Thanks for the help.

iceman2555 on Tue October 09, 2012 2:41 PM

By all means flush the entire system....replace the R/D. Replace or rebuild the hose assembly utilizing the correct crimps for your system. Do not use worm/hose type clamps. Lube charge should be 10-11 oz of mineral lube (r12) or PAG150 (134a). Be sure to drain the sump of the new compressor and refill to spec's. Unfortunately, I do not have a refrigerant specification for this model year at this office. I you do not have this info, post a reply and I can access the info once I return to the shop.
A strong suggestion would be to retain the system in it's R12 configuration.
Good luck with your repair.

-------------------------
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

cw43 on Tue October 09, 2012 2:53 PM

cw43 on Tue October 09, 2012 2:55 PM

Thanks for the info and yes i still need the proper amount of oil each component takes. Thanks again for your time.

mk378 on Tue October 09, 2012 3:29 PM

You put all the oil into the compressor thru the oil plug in the side. It will distribute itself. The only part that actually needs oil to work is of course the compressor.

Edited: Tue October 09, 2012 at 3:31 PM by mk378

iceman2555 on Wed October 10, 2012 10:29 AM

Refrigerant charge is 3.75 lbs/60 oz.
If this were my vehicle, I would stay with R12. Performance/longevity of parts will be better.
Good luck !

-------------------------
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

cw43 on Wed October 10, 2012 2:33 PM

Yes I'm staying with R-12 and I'm hesitant on the prior post to put all the oil into the compressor. I've added oil to each component separately before but I cannot remember how much?? Would you happen to know? Thanks

Dougflas on Wed October 10, 2012 4:59 PM

That vehicle requires 4 lbs of R12 and 10 or 11 oz 525 mineral oil. If you flush the entire system, put all the oil in the compressor. The A6 compressor has a sump for the oil. No other component requires oil so as said previously, put it all in the compressor.

cw43 on Wed October 10, 2012 6:24 PM

thank you that's what I'll do!!