Automotive Air Conditioning Information Forum (Archives)

Cadillac Kid on Fri October 23, 2015 1:41 AM

Year: 1972
Make: Cadillac
Model: Deville
Engine Size: 472
Refrigerant Type: r134a
Country of Origin: United States

Hello everyone.

I'm going to charge the a/c on my project 72' Caddy soon. Hopefully within the next couple of days. I pulled out the old receiver/drier and drained all of the oil contents into a plastic cup. I plan on putting that same amount with new PAG oil into the new drier. I pulled the drain plug on the A-6 a/c compressor and no oil came out. So the compressor obviously needs oil before I recharge it. My question is, to add new oil to go into the compressor sump, do I need to remove the compressor, flip it over and add oil back thought the drain hole? Or can I just add the oil into the drier or another part of the system? If I add the oil into the system, will it work its way to the compressor sump?

This forum is great. The past couple of days I have been looking though old threads. There is tons of useful information here.

Thank you!

-Gavin

Cussboy on Fri October 23, 2015 9:04 AM

The refrigerant will distribute the oil through the system. If you add oil directly to the compressor, be sure to rotate the compressor itself (not just the pulley) several revolutions with a wrench after that.

Cadillac Kid on Wed November 04, 2015 12:27 AM

I charged the A/C last week with r134a. And the air felt cool. I started the car up this afternoon and at idle I had 55* out of the center vent! And that was only idling for a few seconds. I haven't done a proper pressure/ambient temperature test yet, but I intend too. But it is all looking very well. Thanks!

-Gavin