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  #1  
Old 08-28-2009, 10:25 PM
Milt
 
Join Date: Jul 2002
Location: N.W. Arkansas
Posts: 172
A.C. recharge

91 300se, 126 body. I am going to evacuate the airconditioning system and recharge it. I have a small can of "pag 100" oil charge ( 2 oz. of oil and 1 oz.of r 134) Is that the proper amount of oil to use when recharging an A.C. system. Milt.

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  #2  
Old 08-29-2009, 08:54 AM
LarryBible
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When servicing a modern circulating oil a/c system without a complete flush, knowing the amount of oil to add is nothing more than a guessing game.

That said, unless the system has leaked and recharged multiple times your plan is probably as good as any. Perronally I would not follow that plan unless I knew the histroy of the system. If I had no idea about it's service history I would want to completely flush, replace the r/d, fill with the specified oil amount, evacuate and charge.

Hope this helps.
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Old 08-29-2009, 02:14 PM
Milt
 
Join Date: Jul 2002
Location: N.W. Arkansas
Posts: 172
A.C. recharge

Larry: Thanks for your imput. I don't think it has been recharged many times so I will go with the "pag 100" and hope for the best. Milt.
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  #4  
Old 08-29-2009, 02:14 PM
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Location: DFW / Collin County Texas
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Your car originally shipped with R12. Was it converted to R134a?
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  #5  
Old 08-29-2009, 02:18 PM
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It is much more likely that you have POE oil in your system.

If you use any PAG, be sure that it is double end-capped (DEC) PAG. Otherwise, it reacts with residual chlorine. So no, I would not use that can to inject the oil.
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  #6  
Old 08-29-2009, 02:40 PM
Milt
 
Join Date: Jul 2002
Location: N.W. Arkansas
Posts: 172
A.C. recharge

Yes it was recently changed to R134 from R12. The cannister of oil I have says for R-134a systems on it. Made by "Interdynamics". I don't see any sign of "double end capped, (DEC) PAG" on the container. Will check into it further. Thanks for your help. Milt.

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