1980 ac install
Thread Starter
Instructor
Joined: Jul 2011
Posts: 109
Likes: 3
1980 ac install
Will be installing new compressor, accumulator, orfice tube, new main line, going to flush evap and condenssor , O-rings, UV dye. My question is because the system will be dry ( no oil) GM service manual says 6 onces. I will be using PAG 150. 3 onces in new compressir and 3 onces in new accummulator. Does sound good?
Advanced
Joined: Jan 2014
Posts: 77
Likes: 8
From: Muskegon Michigan
I intend to do the same with mine this winter. I am still considering replacing the Evap and Condensor as well so the entire system will be new. Please post how you flushed the condenser and Evap as well as what you used for flush. I look forward to hearing from others who have done this. Gil
Thread Starter
Instructor
Joined: Jul 2011
Posts: 109
Likes: 3
Flush
I intend to do the same with mine this winter. I am still considering replacing the Evap and Condensor as well so the entire system will be new. Please post how you flushed the condenser and Evap as well as what you used for flush. I look forward to hearing from others who have done this. Gil
Last edited by nickster2213; Dec 25, 2018 at 01:59 PM. Reason: Adding more info
Intermediate
Joined: Aug 2018
Posts: 38
Likes: 11
Autozone has a rental flush tool and advance auto has the flush solvent. I just flushed my condenser, going to do the evap next.
Blow out the components first or you will basically waste the first bit of solvent you put through it. I only put like 3ish ounces in the flush tool at a time. The solvent is kind of pricey so no need to flush a bunch through each component all at once. Just flush a small amount through and catch it in a bottle with a hose. Empty the bottle so you can track progress of each flush. You're done when the solvent comes out clear. Only took 3-4 flushes for me. Might want to tape the hose to the bottle or it will fly out and get everywhere if you use the recommended pressure of 90-120psi(not sure that's the exact spec but close) Blow clean dry air through after your done with solvent. The autozone tool kind of sucks b/c it has a schrader valve instead of a 1/4 quick disconnect (air compressor fitting), so you have to use a tire filling end on your air hose. I duct tapped it so it would constantly refill the tool.
https://www.autozone.com/loan-a-tool...kit/326078_0_0
https://shop.advanceautoparts.com/p/...hTerm=ac+flush
Blow out the components first or you will basically waste the first bit of solvent you put through it. I only put like 3ish ounces in the flush tool at a time. The solvent is kind of pricey so no need to flush a bunch through each component all at once. Just flush a small amount through and catch it in a bottle with a hose. Empty the bottle so you can track progress of each flush. You're done when the solvent comes out clear. Only took 3-4 flushes for me. Might want to tape the hose to the bottle or it will fly out and get everywhere if you use the recommended pressure of 90-120psi(not sure that's the exact spec but close) Blow clean dry air through after your done with solvent. The autozone tool kind of sucks b/c it has a schrader valve instead of a 1/4 quick disconnect (air compressor fitting), so you have to use a tire filling end on your air hose. I duct tapped it so it would constantly refill the tool.
https://www.autozone.com/loan-a-tool...kit/326078_0_0
https://shop.advanceautoparts.com/p/...hTerm=ac+flush
Burning Brakes
Joined: Mar 2006
Posts: 829
Likes: 131
From: Spartanburg SC
I believe the preferred method is to put the 3 oz in the compressor, and divide the rest among the accumulator, evaporator, and condenser. If you are installing a new condenser for r134a the tubes are so small it's almost impossible to get an oz of oil in there. If retaining the old r12 condenser, the tubes are larger. This way, you are pretty evenly distributing the oil through the system. Never starving the compressor of oil.
Advanced
Joined: Jan 2014
Posts: 77
Likes: 8
From: Muskegon Michigan
The Compressor I'm using is the stock replacement for my 1980 Corvette, I purchased mine thru Oreillys when I worked there. If I decide to replace the evap and condenser it also will be the stock replacement. The info I had on doing the change over to 134a was to use ester oil (6 oz) I am not familiar with the other oil (PAG). I plan on using the ester with the dye in it. My compressor was shot that's why it was replaced. Thanks for the tip on the flush tool.
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