Will a 12oz can or less “marry-up” R12 in a R12 system. (92 Jeep 4.0)

I’m going to veer off here a bit. Should it be done? No. Can it be done, at least as a short term (year or so) fix? Yes. I’ve done it a few times (long stories) with no problems. However, you must use 134 with Ester oil. It’s touch and go doing this but it’s possible.

Yeah, I’ve noticed it has seemed to have stabilized. I guess that’s just the old cars that require it are getting junked faster than they are using R12. At some point it will get hard to find, but who knows when that will be. I’m down to 1 vehicle that hasn’t been converted to or started out with…

I have two consumer cans (10-12 oz?) that I have no use for. If anyone wants them and is in the Central Ohio area, post a message or e-mail me. You pick it up, it’s yours.

You CAN NOT, CAN NOT, CAN NOT, CAN NOT, CAN NOT mix refrigerant 12 and 134a together! CAN NOT!!! Even if you could adapt a hose to deliver R134a to an R12 system, you’d be destroying the system. And NO ONE would work on it for you when it goes. The same goes for things like Freeze 12. Even thou…

I made the mistake of converting one car, I didn’t like the AC performance so I converted it back. I don’t intend to own anything new enough to use R-134a, and I’m not going to convert anything else to R-134a, so I guess I’ll just keep buying R-12. Right now my shop charges about $60/pound, which …

Of the 3 cars that I’ve had converted I did not notice any difference in AC performance. One had pretty marginal AC both before and after, the others were good with both types. I’ve heard you and a few others say that the R134a doesn’t work as well, but my experience in my cars says it’s not a big…

I all has to do with the size of the condenser and the evaporator, if they are large enough the R-134a will still have enough capacity to give you good cooling, If they are sized for R-12 with very little extra capacity, the reduced efficiency of the R-134a will not hack it in really high temperatu…

I’m guessing that it’s not something you can package and mail, is it?

Of course a full conversion is the best way to do this, but I have to respectfully disagree with the premise that it cannot work, will not work, and will destroy the system. About 10 years ago my first SAAB was not cooling as good as it should have and since the temps were about a 105 at the time I…

Mixing R134A with R12

Maintenance/Repairs

rexy44 August 16, 2007, 8:12pm 11

Thank you all for your input. That ole Jeep on these 100+ days gets so HOT. It shows 40-45 deg. by meat thermometer up to 11-12am then goes to 60-65. Wiser to just do everything early or wait til evening when pssible. Thanks again guys, enjoy the forum. I will most likely convert, as we did the wifes 90 Toronado. Rex

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Mixing R134A with R12

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