1966 Factory AC Charge Amount - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**damnyankee36** · 06-21-2019, 10:25 AM

Anybody know the R12 charge capacity for a factory system?

Thanks!

**Steeveedee** · 06-21-2019, 04:45 PM

They are generally 3 point something pounds. There should be a sight glass in the drier that you can watch. It's charged if there are no bubbles of refrigerant. If the system wasn't evacuated properly there will be residual air that will show as bubbles, as well. Your best bet is to put in 2 pounds and then start the system running and check temperatures and pressures until it's charged. You will probably need a fan pushing air into the condenser to keep the pressures down.

06-21-2019, 10:25 AM	#1
damnyankee36 Senior Member Join Date: Sep 2002 Location: Alamogordo, NM Posts: 724	1966 Factory AC Charge Amount Anybody know the R12 charge capacity for a factory system? Thanks!

06-21-2019, 04:45 PM	#2
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,698	Re: 1966 Factory AC Charge Amount They are generally 3 point something pounds. There should be a sight glass in the drier that you can watch. It's charged if there are no bubbles of refrigerant. If the system wasn't evacuated properly there will be residual air that will show as bubbles, as well. Your best bet is to put in 2 pounds and then start the system running and check temperatures and pressures until it's charged. You will probably need a fan pushing air into the condenser to keep the pressures down. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

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