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A/C question #4710740
03/29/18 05:21 PM
03/29/18 05:21 PM
Joined: Jun 2014
Posts: 423
Clermont, Fl
007 Offline OP
007  Offline OP

Joined: Jun 2014
Posts: 423
Clermont, Fl
I recently had my A/C in my 1986 Buick T Type converted to R134 from R12.. Before the swap I was running cool but not cold. After the swap I was told I may be leaking from my compressor as it showed signs of oil leakage. Long story short I now have NO cold air and a guage check indicates NO Freon in the system. Is this possible or have I been had? I was told I might need a new compressor but the sudden change is kind of dramatic.

Re: A/C question [Re: 007] #4710764
03/29/18 05:56 PM
03/29/18 05:56 PM
Joined: Oct 2009
Posts: 393
California
Billbert Offline
Billbert  Offline

Joined: Oct 2009
Posts: 393
California
R134a has a much smaller molecular size than R12. Extremely small leaks with R12 can become much larger leaks when the system is converted to R134a. It just happens occasionally, with no great way to predict the outcome of the conversion.


If you think you can, or if you think you can't, You are probably right.

Auto Instructor / ASE Master Tech
Re: A/C question [Re: 007] #4710775
03/29/18 06:11 PM
03/29/18 06:11 PM
Joined: Sep 2015
Posts: 1,693
USA
mk378 Offline
mk378  Offline

Joined: Sep 2015
Posts: 1,693
USA
Leaky parts never get better with time.

Re: A/C question [Re: 007] #4710782
03/29/18 06:19 PM
03/29/18 06:19 PM
Joined: Jun 2005
Posts: 11,957
Santa Barbara, CA
bdcardinal Offline
bdcardinal  Offline

Joined: Jun 2005
Posts: 11,957
Santa Barbara, CA
Whoever did the conversion really should have fixed any leaks, or at the very least given you a proper estimate, before giving the vehicle back to you.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: A/C question [Re: 007] #4710789
03/29/18 06:26 PM
03/29/18 06:26 PM
Joined: Sep 2012
Posts: 5,523
DFW
DBMaster Offline
DBMaster  Offline

Joined: Sep 2012
Posts: 5,523
DFW
And, R134a usually runs at higher pressures than R-12. So, if you did have a leak - indicated by oily residue - the new refrigerant definitely would leak out faster than the R-12. I had an 89 Honda converted to Freeze 12 eight years ago. It's basically about 80% R134a with another gas blended in that is able to carry the mineral oil through the system. My output temperatures were about three degrees higher than with R-12 and A/C performance while the car was stopped was somewhat reduced. I'd rather stick with R-12 or HC refrigerants.

Re: A/C question [Re: 007] #4710791
03/29/18 06:27 PM
03/29/18 06:27 PM
Joined: Jun 2003
Posts: 18,419
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 18,419
Deplorable in apple valley, ca
If it has that round R4 compressor they all leak.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: A/C question [Re: Chris142] #4710829
03/29/18 07:19 PM
03/29/18 07:19 PM
Joined: Dec 2016
Posts: 8,017
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,017
Waco, TX
Originally Posted By: Chris142
If it has that round R4 compressor they all leak.


Agreed.... one of GM's not-so-better ideas......


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: A/C question [Re: 007] #4710848
03/29/18 07:54 PM
03/29/18 07:54 PM
Joined: Jun 2014
Posts: 423
Clermont, Fl
007 Offline OP
007  Offline OP

Joined: Jun 2014
Posts: 423
Clermont, Fl
Would using Freon with stop leak work?

Re: A/C question [Re: 007] #4710852
03/29/18 07:57 PM
03/29/18 07:57 PM
Joined: Dec 2011
Posts: 5,653
North Carolina
rooflessVW Online content
rooflessVW  Online Content

Joined: Dec 2011
Posts: 5,653
North Carolina
Originally Posted By: 007
Would using Freon with stop leak work?

Yeah it'll clog everything up nicely.


"Zed's dead baby, Zed's dead."
Re: A/C question [Re: rooflessVW] #4710872
03/29/18 08:18 PM
03/29/18 08:18 PM
Joined: Jun 2003
Posts: 18,419
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 18,419
Deplorable in apple valley, ca
Originally Posted By: rooflessVW
Originally Posted By: 007
Would using Freon with stop leak work?

Yeah it'll clog everything up nicely.
ya it will.dont put a rebuilt compressor on it either. New only.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: A/C question [Re: 007] #4710927
03/29/18 09:06 PM
03/29/18 09:06 PM
Joined: Dec 2013
Posts: 2,853
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline

Joined: Dec 2013
Posts: 2,853
Fort Worth, Texas
134a conversion fittings can cause leaks all by themselves.....On a car like yours, I would restore the system & charge it with R-12.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: A/C question [Re: 007] #4710943
03/29/18 09:17 PM
03/29/18 09:17 PM
Joined: Dec 2002
Posts: 42,625
New Jersey
JHZR2 Offline
Global Moderator
JHZR2  Offline
Global Moderator

Joined: Dec 2002
Posts: 42,625
New Jersey
How complete was the retrofit. A good job can work well, but if certain things are overlooked or not done, leaks and other issues can be prevalent.

R12 has dropped in price. You may have been much better off leaving it.

Re: A/C question [Re: 007] #4711091
03/30/18 01:24 AM
03/30/18 01:24 AM
Joined: Feb 2014
Posts: 2,779
Canada
Lolvoguy Offline
Lolvoguy  Offline

Joined: Feb 2014
Posts: 2,779
Canada
I never knew r12 was still available. I thought it was phased out years ago


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Say "no" to Turbo!
Re: A/C question [Re: Lolvoguy] #4711461
03/30/18 11:45 AM
03/30/18 11:45 AM
Joined: Jun 2003
Posts: 18,419
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 18,419
Deplorable in apple valley, ca
Originally Posted By: Lolvoguy
I never knew r12 was still available. I thought it was phased out years ago
we still have 60 lbs of it. Is getting harder to find. I often buy it at yard sales.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: A/C question [Re: bdcardinal] #4711701
03/30/18 04:27 PM
03/30/18 04:27 PM
Joined: Jun 2014
Posts: 423
Clermont, Fl
007 Offline OP
007  Offline OP

Joined: Jun 2014
Posts: 423
Clermont, Fl
Originally Posted By: bdcardinal
Whoever did the conversion really should have fixed any leaks, or at the very least given you a proper estimate, before giving the vehicle back to you.


I agree. Mechanic stated the system held vacuum for some time before they added 134 otherwise he would have not added any Freon with a leak. Car is going back Monday to see what the dye says. I also asked to be compensated for my $122 spent on hot air in the final repair to which he agreed. Will see what happens!

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