i have r12 for my a/c. do i put liquid in the low side and gas in the high pressure side?

 

I hope you mean. I have a few cans of R12, which side do I recharge the system at?

In that case the low side but you may want to bum some guages off someone to see if your system is low. Might even want to pull vacuum on it to see if there are any leaks before you recharge your system with somthing that is so expensive. 1 can of R12 costs as much as a R134a retrofit kit might keep that in mind.

 

Yes, charge the low pressure side (at the accumulator) regardless of whther it's gas or liquid.

If the R12 seems like a cost prohibitive option, you can use R414B at a far lower price and with cooling performance far superior to R134A, and even a little better than R12. R414B also is completely miscible with R12 and compatible with the mineral oils used with R12, so it is even acceptable as a top-off refrigerant in R12 systems.

If I had some R12, I'd sell it for some goofy high price and buy a 25# cylinder to R414B and have cash to spare.

 

i think its illeagl to sell r12, atleast without the proper papers. I found a couple of cans in a barn. Sold for 78 cents from kmart back in the 70s.

 

where would you find R414B at? would it be like the cans of the R134A cuz i got a retrofit kit from my mom's car and id rather do this the cheap way also if i got 134 in mine (i might because it looks like i got the lil retrofit conectors on my canister and lines) would the 2 be compatable?

 

High side as a liquid(Engine must be off or you can blow up your can)
Low side as a gas
Low side as a liquid(Only with an acumulator)

Only three ways to do it. You can obviously see why low side as a gas is your best bet for any aplication.

 

Except for some tertiary blends. They MUST be charged in liquid phase only to assure that the correct mixture is installed. In gas phase, non-azeotropic action will boil the lighter elements off first and to a higher vapor pressure, and those will be the first to charge the system. That usually isn't acceptable with blends.

 

still wonderin about the R414B......

 

I get my R414 in 25# cylinders. I've got it in my '86, and it works very well, even with the T=tops. I don't think you want to mix it with R134, even if it can be mixed. Why compromise the cooling?