AC Question
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
R134a wasn't placed in a 'stock' 1970 system...it used R12 freon. The stock system takes 3 lb. 4 oz. of R-12 and 11 oz. of 525 viscosity lubricating oil. I have no idea how much R134a should be used; nor do I know that it will work properly without changing some of the components.
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
My '77 shows 3.00 lbs. on compressor sticker. Do not know if your car would be exactly the same. It is easy to overcharge a system but 2.4 lbs. is not that far off. mds...
Oops 7T1 beat me again.
Oops 7T1 beat me again.
Last edited by mds3013; Dec 16, 2009 at 09:18 PM.
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
heres some old SUN specs page for a 71..
http://www.71corvette.com/sun2.jpg
if your car has 134a, the high and low side fittings will be different than the old r-12 .. I guess if you have evac the system you have determind this
http://www.71corvette.com/sun2.jpg
if your car has 134a, the high and low side fittings will be different than the old r-12 .. I guess if you have evac the system you have determind this
