R134 Refrigerant Capacity?

[kna4977]

How many cans of R134 are needed to recharge a stock original system on a 1972 from empty after vacuuming and sealing?

[Dave]

I would call Old Auto Products, I'm sure they'll know.
817-531-2665

[kna4977]

I don't want to call a company about it. Someone on here likely knows and has recently done it. Please chime in if you know.

[samert111]

R134a is not compatible with a 1972 factory original system that used R12 at the time which is next to impossible to get, and if you did find some it would be obscenely expensive. It is no longer produced and anything out there would be either recycled or old stock.

R134a was first introduced in early 1990's.

[Stocker]

Originally Posted by samert111

R134a is not compatible with a 1972 factory original system that used R12 at the time which is next to impossible to get, and if you did find some it would be obscenely expensive. It is no longer produced and anything out there would be either recycled or old stock.

R134a was first introduced in early 1990's.

This pretty much agrees with everything I have heard & read. You can convert your factory A/C to use R134a, but it does involve changing some of the components.

[Richard]

IIRC the stock R12 charge is 3.25 or 3.5 lbs. R134a charge would start at 15% less, so start at about 2.8 lbs. Hopefully you have addressed the conversion needs. As mentioned you cannot just throw 134a into a stock system. You will be very disappointed as the system will not produce any cool air without proper corrections.

[kna4977]

Originally Posted by samert111

R134a is not compatible with a 1972 factory original system that used R12 at the time which is next to impossible to get, and if you did find some it would be obscenely expensive. It is no longer produced and anything out there would be either recycled or old stock.

R134a was first introduced in early 1990's.

I actually have several cans of r12 on the shelf, however my system has supposedly been converted to 134, but I have my doubts that it was done correctly. What components need to be changed what corrections need to be made?

[RustyPile]

Originally Posted by kna4977

I actually have several cans of r12 on the shelf, however my system has supposedly been converted to 134, but I have my doubts that it was done correctly. What components need to be changed what corrections need to be made?

It's very tackey of you to demand someone do your leg work and/or spoon feed you the information. This conversion is discussed all over the internet.. I'll offer this as starters.. POA valve, schraeder valves, compressor oil. And depending on which one you have, probably the condenser.. This list is not all conclusive...