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Sue, if you are still located in the South where it is humid, I suggest you first try hard to find a shop that still has the equipment to fill/fix R-12 auto air conditioning systems, if yours is still the original. ?Converting to the newer R-134a refrigerant will never work as well (keep you as comfortably cool) as the original R-12 refrigerant, unless you swap out absolutely every component. ?Yes, folks argue that the R-134a refrigerant is a lot cheaper, but it is not directly compatible with the R-12 components. ?You can expect to spend perhaps $1500 to get the original system fully working again, or perhaps that much to swap out everything for an R-134a replacement system. ?Either way, auto air conditioning is an expensive luxury. ?To keep it in perspective, ask anyone from our parents¡¯ generation if you still can (born in the ¡®20s and ¡®30s), and they will tell you how they simply drove across the country without it.?
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Sue, ?I was born in 1943, No one had A/C in the fifties and we traveled extensively in the western states.? It was cool, no interstates lots of small towns with horses tied to hitching rails and wooden sidewalks.? It was very hot but that¡¯s just how it was.? I have an ¡®87 Sunrader with out cab A/C.? I¡¯m ok with it, but admittedly I tend to travel in northern states and Canada. ?? Jim |
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Hi Tika, I was told by my mechanic that the R12 refrigerant wasn't available any more, but maybe that was just him. He quoted about 2K just offhand to replace entire system. I personally love riding with windows down, but there have been days when AC was just a necessity -- and I'm still alive and kicking in Georgia!
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I too converted my R12 to R134a. I ordered an O-ring kit, conversion kit and filter drier from Amazon, about $60 total. I let an A/C tech evacuate the old R12. He did it for free. He will clean it and resell for big $. I picked up a vacuum pump and gauges from O'Reilly's, free rental. Replaced O-rings at condenser and compressor. Replaced low and High pressure ports, which is the conversion kit. Pulled and held a vacuum, so no leaks. Added freon, R134a with PAG oil to spec. Whole job done in a day. Now I have cold A/C, 62 degrees at vent. One negative is that the 87' toyota doesn't have a high output blower fan. On a hot day it will work to cool thej cab. You will need to seal off the rest of the RV to contain the A/C air.? Also, it does rob the engine of a few HP.? This may matter to us 4 cylinder folks.? On and opposing note. If you do not intend to have A/C, I'd remove the condenser coil to improve radiator cooling. I'd also remove the compressor belt to improve HP. Also remove the compressor for weight. You can always reinstall these items when you sell.? On Mon, Jun 5, 2023, 10:20 AM rz <zaveson@...> wrote: i converted my system to 134. and the difference would be hard to tell. cools very well and i live where it us regularly over 100 |
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Wasn't aware this was a contest. Also needed to note,? Im in Fl with 96 degree temps and nearly 96% humidity. I also took this temp at idle. If I wanted to use my cab as a meat locker and dismiss the environmental determent of R12, I might see your reasoning. However, Im comfortable at 62 degrees knowing the reason R12 is no longer produced. Out of curiosity, do you use deodorant or hair spray from an aerosol can? You just can't bet the cooling effect of xylene. On Mon, Jun 5, 2023, 1:55 PM Paul Cherubini <monarch@...> wrote:
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Jogues
rz