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jhplove737

July 13th, 2008 1:20 AM

1990 Chevy Lumina recharge a/c envirosafe refrigerant

I just replaced on my 1990 Chevy Lumina the a/c condenser due to a leak , after a sys vaccum , do I need to add oil for 134-a ?and how much quantity before I filled with refrigerant.

thanks

jkgray80

July 16th, 2008 9:35 PM

RE: 1990 Chevy Lumina recharge a/c envirosafe refrigerant

I already know someone is going to disagree. With that said,,,,,You need PAG oil (parts store can getyou right weight). Get 8oz can & add 4oz.Thenfill w/134 at 85%of 12 amount.For example, if your car holds 2 lbs of r12 charge it w/1.7 of r134. Charge amount will be listed underhood.

shawnvw

July 18th, 2008 3:03 PM

RE: 1990 Chevy Lumina recharge a/c envirosafe refrigerant

Quote:

ORIGINAL: jkgray80

I already know someone is going to disagree. With that said,,,,,You need PAG oil (parts store can getyou right weight). Get 8oz can & add 4oz.Thenfill w/134 at 85%of 12 amount.For example, if your car holds 2 lbs of r12 charge it w/1.7 of r134. Charge amount will be listed underhood.

I won't disagree with that

I will say that the vehicle's R12 capacity is 36oz which works out to be 2.25lbs which works out to be about 1.9lbs of R134a

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