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| How to find a mechanic for R12 AC unit. (Page 1/2) |
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robmox
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MAY 24, 04:34 PM
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I'm trying to swap my AC from an R12 to an R134, but I can't find anyone to pull the R12 refrigerant out for me. Any idea how to find a mechanic that can do that for me?
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RWDPLZ
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MAY 24, 04:52 PM
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Have you checked the pressure to see if there's any left in the system? At this point most broken systems have leaked out.
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theogre
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MAY 24, 05:58 PM
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that's often true...
And when true... you have a lot more to fix before changing like need to rebuild "rubber" hose w/ hose meets current standards.
And not all old compressors like R134 and oils goes w/ it.
if has R12...
Keep calling shops in wider and wider area.
For cars... Many shops never had R12 equipment. Others dump them because space and legal reasons for little use of system.
Some HVAC "shops" for home etc is more likely still has R12 because some old systems still have R12. But most old AC and refers units had R22 and not the same.
Even if find a shop still handles R12... If fails a "sniffer" looking for contaminated refer then can want more money or refuse to touch it. Because Many Fools put all kinds of crap in old R12 car systems including illegal Propane, "Freeze12" and more. Even R1234yf in cars never made to have it.
When a shop handle Contaminated Refer mix then get Burned at HAZMAT facility that cost money. Isn't like dirty R12 etc gets recycled.
And many car shops still won't touch 15+ year old systems let alone 30+ year old cars. Any leaks or worse after they work on "old crap" and can find EPA and State Equiv fining, order to shut down, and worse. So may not find a shop to charge w/ R123 even after you restore the car.------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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robmox
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MAY 24, 08:08 PM
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| quote | Originally posted by RWDPLZ:
Have you checked the pressure to see if there's any left in the system? At this point most broken systems have leaked out. |
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I haven't checked it myself because I do not own the tools. I figure for the cost of $40, it's cheaper to just bring it in to be emptied than to buy the required tool.
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robmox
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MAY 24, 08:13 PM
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| quote | Originally posted by theogre:
And many car shops still won't touch 15+ year old systems let alone 30+ year old cars. Any leaks or worse after they work on "old crap" and can find EPA and State Equiv fining, order to shut down, and worse. So may not find a shop to charge w/ R123 even after you restore the car.
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Yeah, I figure my best bet at finding a shop to drain the R12, if any, would be a shop that specializes in classic cars.
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latyart
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AUG 02, 12:37 AM
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R134 does run at higher pressures. Really is sub-par in a system designed for R12. The R12 systems don't have the necessary capacity to cool well with R134. (of course, I am in Texas )I have been through the A/C stuff with a '77 turbo Carrera (not enough capacity no matter what you do), '86 Carrera, 96 Carrera, 90 C2 & 91 C4. When it's 100+, it gets really tough to get the systems to recover after sitting in the heat. The 964 & 993 systems do surprisingly well with the capacity Porsche added to the vent system starting in '86. Give the Freeze 12 a shot. I oftenly read new articles on hvaclifehack.com, try to read them, I think you will be pleased.
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Larryinkc
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AUG 02, 07:34 AM
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Dennis LaGrua
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AUG 02, 08:21 AM
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| quote | Originally posted by latyart:
R134 does run at higher pressures. Really is sub-par in a system designed for R12. The R12 systems don't have the necessary capacity to cool well with R134. (of course, I am in Texas )I have been through the A/C stuff with a '77 turbo Carrera (not enough capacity no matter what you do), '86 Carrera, 96 Carrera, 90 C2 & 91 C4. When it's 100+, it gets really tough to get the systems to recover after sitting in the heat. The 964 & 993 systems do surprisingly well with the capacity Porsche added to the vent system starting in '86. Give the Freeze 12 a shot. I oftenly read new articles on hvaclifehack.com, try to read them, I think you will be pleased. |
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My Fiero has an R-134 conversion and its quite comfortable in 95* degree weather. Never drove in 100* weather as it rarely gets that hot here. It runs a new compressor and when the conversion was done all lines were opened and blown out of all the old mineral oil so maybe that helps. Removing all the old oil allows for the maximum R-134a charge. If you don't get it all out you will be running at less efficiency. ------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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sanderson231
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AUG 02, 11:08 AM
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| quote | Originally posted by latyart:
R134 does run at higher pressures. Really is sub-par in a system designed for R12. The R12 systems don't have the necessary capacity to cool well with R134. (of course, I am in Texas )I have been through the A/C stuff with a '77 turbo Carrera (not enough capacity no matter what you do), '86 Carrera, 96 Carrera, 90 C2 & 91 C4. When it's 100+, it gets really tough to get the systems to recover after sitting in the heat. The 964 & 993 systems do surprisingly well with the capacity Porsche added to the vent system starting in '86. Give the Freeze 12 a shot. I oftenly read new articles on hvaclifehack.com, try to read them, I think you will be pleased. |
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I also live in Texas. Fieros cool just fine with R-134a. I own three with R-134a. Recent data - 47-50 'F out the vent with fan on Hi and 100 'F ambient. That's enough to make the car uncomfortably cold. If the system does not provide adequate cooling, there is something else wrong - don't blame the refrigerant.------------------
formerly known as sanderson
1984 Quad 4
1886 SE 2.8L
1988 4.9L Cadillac
1988 3800 Supercharged
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PhatMax
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AUG 02, 03:21 PM
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Dennis….. did you run any kind of “cleaner” thru the old lines like denatured alcohol ? Or just blow it out ?
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