Re: R12 to R134
[Re: attaboy]
#1991478
01/15/16 08:21 PM
01/15/16 08:21 PM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
top fuel
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top fuel
Joined: Aug 2007
Posts: 2,356
Kentucky
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I charged an R12 system to R134 on a 72 Charger. Replaced the dryer on an original type and had a tech evacuate the system and charge it with R134 oil and freon. It worked great and ran for two summers and then the compressor locked up on the way home from the Nats. I understand the cause of the failure was either not all the old oil was evacuated or the higher system pressure of the 134 or both. The answer to your question is in my experience it will work but other problems will probably shorten the life of the compressor. FWIW I changed the entire system over to a Sanden compressor with a new dryer and hardware. Still running the old condenser.
‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500
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Re: R12 to R134
[Re: attaboy]
#1992128
01/16/16 07:28 PM
01/16/16 07:28 PM
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Joined: Jan 2003
Posts: 25,942 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,942
Rio Linda, CA
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I'm changing from R12 to R134?
Don't do it.
The INTERNET, the MISinformation superhighway
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Re: R12 to R134
[Re: attaboy]
#1992184
01/16/16 08:45 PM
01/16/16 08:45 PM
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Joined: Jun 2005
Posts: 6,257 gulfport, ms, west mi
rowin4
master
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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Back in 1997 iI bought a 95 GrandAm that was hit in the front, needed a new radiator and AC condenser, changed them out ,put in a few cans of 134 , didn't even pump the system down. Air was cold and never had a problem,. Put over 100,000 miles on that car and the air still was cold.
it's ok to butt heads, just don't do it with a butthead
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Re: R12 to R134
[Re: attaboy]
#1992205
01/16/16 09:34 PM
01/16/16 09:34 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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And a 95 Pontiac has ZERO to do with a 71 Mopar's AC system, care to guess when what year R134 was mandated?
1995
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: R12 to R134
[Re: Supercuda]
#1992275
01/16/16 11:14 PM
01/16/16 11:14 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I was gonna do it at one time & I checked into it somewhat & they said: convert to the "barrier"? hoses, replace the reciever/drier, replace the valve that sets just forward of the firewall there on one of the two lines that come out from it, do something (change?) the oil in the compressor and maybe some more things. Heat dont bother me so I let it slide & I've been in some R12 cars & its like being locked in a cooler
live every 24 hour block of time like it's your last day on earth
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Re: R12 to R134
[Re: RapidRobert]
#1992315
01/16/16 11:57 PM
01/16/16 11:57 PM
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Joined: Dec 2004
Posts: 10,556 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,556
Rittman Ohio
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I've done quite a few conversions on early 90's Toyota vehicles with zero issues. I have done a conversion on a 68 Chrysler 300 and retained the original hoses,drier, and compressor. The owner has been using it for 3 years with no issues at all. The automotive industry was putting out some ridiculous claims that your system would be ruined and you have to change all your rubber components before you make the conversion. It's all just a bunch of propaganda to make you buy more parts $$$. I have had good results with all my conversions Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: R12 to R134
[Re: fourgearsavoy]
#1992355
01/17/16 01:26 AM
01/17/16 01:26 AM
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Joined: Apr 2011
Posts: 315 Ontario, Canada
RealWing
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 315
Ontario, Canada
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I converted my '69 Cuda Fastback to 134a. I prepped the system by: - removing and cleaning the sump on the compressor to remove all the old oil - changed all O rings to 134a compatible ones - kept original hoses - flushed the condenser and evaporator and all lines with A/C flushing fluid (removed the condenser and laid flat to get better flush) - installed new 134a drier - installed new expansion valve for 134a - vacuum dried, added oil and charged with 134a to about 75% of R12 charge. Works great!!!
1970 Superbird 440-6bbl, auto 1969 Barracuda 340-4bbl, FB Formula S auto 1969 Barracuda 6.1 L Hemi, 5 speed, Convertible 2022 Can Am Spyder RTL
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Re: R12 to R134
[Re: fourgearsavoy]
#1992419
01/17/16 05:14 AM
01/17/16 05:14 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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I've done quite a few conversions on early 90's Toyota vehicles with zero issues. I have done a conversion on a 68 Chrysler 300 and retained the original hoses,drier, and compressor. The owner has been using it for 3 years with no issues at all. The automotive industry was putting out some ridiculous claims that your system would be ruined and you have to change all your rubber components before you make the conversion. It's all just a bunch of propaganda to make you buy more parts $$$. I have had good results with all my conversions Gus Same here as I have changed a bunch of cars from R-12 to the R-134 and all have worked good with no problems. As Gus said when they first came about they were telling us we had to change alot of parts including the comp on some cars. Then a few years later they changed what they said. You should evacuate the system real good and use the right comp oil for the R-134. I have done many and have not changed the comp or drier on some. But I tell the cust to change the drier as thats the way I was taught on AC systems but like I say they have worked fine for me even on the ones where the cust would not let me change the drier or accumulator. Ron
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