Whons Posted March 8, 2023 Share Posted March 8, 2023 I needed a new compressor because it was leaking oil around the pulley clutch area. I was told that if it was leaking oil,it was also leaking refrigerate. I didn't want to buy it now but the price kept going up. So I got it from Summit.I know I won't have any trouble mounting it. But I don't know about adding the right oil. Could anyone recommend the best you tube video to get everything done right. I probably won't put it in until May, but can start planning it out Quote Link to comment Share on other sites More sharing options...
1970mcss Posted March 8, 2023 Share Posted March 8, 2023 Did you convert to R134 freon?? Or still using R12?? Quote Link to comment Share on other sites More sharing options...
Whons Posted March 8, 2023 Author Share Posted March 8, 2023 The guy who had the car before me converted it to R134 Quote Link to comment Share on other sites More sharing options...
Whons Posted March 8, 2023 Author Share Posted March 8, 2023 I just started reading putting oil in the new compressor need some advice Quote Link to comment Share on other sites More sharing options...
jft69z Posted March 8, 2023 Share Posted March 8, 2023 The oil requirements for R12 & R134a are different. Did you get a Sanden compressor, or have the large original type? Do you have the right tools as well, such as a vacuum pump, gauges, refrigerant weight scale, etc? 1 Quote Link to comment Share on other sites More sharing options...
Whons Posted March 8, 2023 Author Share Posted March 8, 2023 I have the large original type of compressor. My Daughters boy friend is an auto mechanic and has all the equipment. I was just wondering if I could mount the compressor ahead of time with the belt on and still run the car without using the ac. The instructions talk about oil in the compressor. don't want to screw that up. I would just like to have it ready. I'm a toolmaker and I like to take my time. He works too fast for me. I don't know if there is any refrigerant in the system now. Also last season the power to the compressor was intermitent (I can't spell) ha ha. 1 Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted March 8, 2023 Share Posted March 8, 2023 Is the system currently completely sealed from outside air. If not it could be compromised. I would take it to an AC shop that knows what they are doing. Compressors are too expensive to risk damage. Since the compressor isn't running unless the clutch is engaged I don't think it would be a problem to run it with a belt with the clutch not engaged. A professional may want to completely purge the freon and oil from the system so they know how much oil is in the system. When running the compressor is circulating the oil and freon at the same time. Too much and not enough oil in the system is not a good thing. rob 2 Quote Link to comment Share on other sites More sharing options...
Dtret Posted March 8, 2023 Share Posted March 8, 2023 I agree with the others but will add, if you’re going to mount it I would at least put some oil in the system. When it gets properly repaired it’s all going to be evacuated anyway. You can also put it all together and just leave the belt off for now. 2 Quote Link to comment Share on other sites More sharing options...
jft69z Posted March 8, 2023 Share Posted March 8, 2023 My opinion, just leave the bad one on there until you're ready to do the job correctly. The PAG oil used for a R134a system is 'hygroscopic', meaning it absorbs moisture. If you just pour oil in the compressor, without evacuating it and then install it, the inherent moisture that is in the system can turn to acid and cause more problems. The daughter's boyfriend should know this if he's a halfway decent technician. Otherwise, like Rob said, bring it to a shop that knows what they're doing. If that new compressor grenades, it'll send metal throughout the entire system. Then you'll be flushing and replacing everything. Don't even be tempted to try & charge the system with that crap you see on TV...'ACPro in a Can'. That stuff has sealant in there that'll cause more expensive problems as well. Use good virgin R134a, and give it a shot of A/C dye to help locate leaks down the road if you wish. 2 Quote Link to comment Share on other sites More sharing options...
Whons Posted March 8, 2023 Author Share Posted March 8, 2023 Thanks for all the info. I think I will leave the old one in there and wait for warmer weather so I don't disturb the lines and get moisture in the system. Thanks Wayne 2 Quote Link to comment Share on other sites More sharing options...
jft69z Posted March 8, 2023 Share Posted March 8, 2023 19 minutes ago, Whons said: Thanks for all the info. I think I will leave the old one in there and wait for warmer weather so I don't disturb the lines and get moisture in the system. Thanks Wayne Good call. I used to use this pic when people asked about doing A/C work themselves... That's what it costs when you bring it to a real shop after trying to use that crap. Also, I'd tell them to google 'A/C compressor black death'. It explains what happens when the refrigerant absorbs moisture and forms acid, as I mentioned earlier. Example: https://www.brakeandfrontend.com/are-your-customers-a-c-systems-facing-black-death/#:~:text=Black Death happens when moisture,system or damage the compressor. https://www.underhoodservice.com/a-c-update-keeping-the-black-death-at-bay/ 1 Quote Link to comment Share on other sites More sharing options...
Whons Posted March 10, 2023 Author Share Posted March 10, 2023 I read the GM instructions for my ac compressor and they recommended changing the accumulator and the expansion valve. So I ordered everything including the proper pag oil. My Daughter's boyfriend who is a auto mechanic is going to help me in the spring to get everything done properly. 2 Quote Link to comment Share on other sites More sharing options...
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