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#26 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Converting factory AC to use R134a
I am definitely going back to R12. I looked over my new to me truck last night and the condenser is not original and much larger than stock. In fact, it is jammed under the hood latch plate and bent into a curve to fit. That ugly duckling is coming out. Now I am in the market for an R12 condenser if someone that converted to R134a has one lying around (and doesn't leak of course
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#27 |
Active Member
![]() Join Date: Feb 2011
Location: Deep South Texas
Posts: 116
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Re: Converting factory AC to use R134a
Got my cross flow condenser from AMERICAN Radiator part #9011239. This one fits but of course you have to use the mounting hardware to install.
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#28 |
Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Re: Converting factory AC to use R134a
where did you get your American radiator? and do you have a pic of it installed???? how do you like it I assume you went 134
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1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach "Wanda" Don't argue with idiots, People watching may not be able to tell the difference... There's someone in my head........But it's not me...... cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394 Last edited by hdff; 03-18-2015 at 08:06 PM. |
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#29 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Converting factory AC to use R134a
Both my trucks are running 134a with all factory components, with the POA valve recalibrated.
The systems were flushed before the change over. Larry
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#30 |
Active Member
![]() Join Date: Feb 2011
Location: Deep South Texas
Posts: 116
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Re: Converting factory AC to use R134a
I contacted American Radiator and gave them the measurements. My truck had stock ac,but when my compressor gave out I decided to update the system. Installed evaporator update kit, pro6ten compressor, orifice tube, drier and new cross flow condenser. Just haven't charged it yet. The only part I going to reuse are the hoses.
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#31 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,519
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Re: Converting factory AC to use R134a
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#32 |
Active Member
![]() Join Date: Feb 2011
Location: Deep South Texas
Posts: 116
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Re: Converting factory AC to use R134a
The measurements are 25x14. I measured it from the outside of the tanks not the core itself.
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#33 |
Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: Converting factory AC to use R134a
I have had the same problem. A lot of out farm equipment has A6 compressors and I have found that the only reman A6 that will last is John Deere's. Everything else will fail within a year. John Deere's A6 (rebuilt right here in the states) will last.
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#34 |
Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Re: Converting factory AC to use R134a
Www.Americanradiator.us Is this where you got it?
__________________
1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach "Wanda" Don't argue with idiots, People watching may not be able to tell the difference... There's someone in my head........But it's not me...... cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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#35 |
Active Member
![]() Join Date: Feb 2011
Location: Deep South Texas
Posts: 116
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Re: Converting factory AC to use R134a
It's americanradiator.us I still have the box with the address.
American Radiator 1616 NE Broadway Ave. Des Moines Ia, 50316 (515)265-8818 |
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#36 |
Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Re: Converting factory AC to use R134a
Thanks. I getting my thoughts together before starting this project. If you have a chance could you post up a couple of pics of it. Visuals are great for me. Thanks. Keith
__________________
1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach "Wanda" Don't argue with idiots, People watching may not be able to tell the difference... There's someone in my head........But it's not me...... cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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#37 |
Active Member
![]() Join Date: Feb 2011
Location: Deep South Texas
Posts: 116
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Re: Converting factory AC to use R134a
I'll try to take some pics as soon as I have a chance.
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#38 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Converting factory AC to use R134a
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#39 |
Senior Member
![]() Join Date: May 2003
Location: Sandown, NH
Posts: 2,818
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Re: Converting factory AC to use R134a
Thanks David, but I have a Sanden 508, you don't happen to know how much that would take ?
Thanks, Gary
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Gary 72 SWB 4x4 My 72 SWB Build http://67-72chevytrucks.com/vboard/s...d.php?t=259859 |
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#40 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Converting factory AC to use R134a
I think you'd be safe with 7-8 ounces. Make sure you're using new barrier hoses as the 134a and PAG will slowly ruin the older style hose.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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#41 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Converting factory AC to use R134a
My information says a Sanden 508 needs 5.5-6 ounces of PAG 100 oil.
What I have read is that the mineral oil used in R12 systems impregnates the rubber (hoses) and thus prevents the R134a molecules from leaking through (thus barrier hoses not required). I have not heard that PAG oil attacks the rubber hoses. With all that said, you cannot go wrong in replacing or having the hoses rebuilt with barrier hoses. |
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#42 |
Senior Member
![]() Join Date: May 2003
Location: Sandown, NH
Posts: 2,818
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Re: Converting factory AC to use R134a
Thanks David !!!
The hoses will all be new, and correct for R134A... Gary
__________________
Gary 72 SWB 4x4 My 72 SWB Build http://67-72chevytrucks.com/vboard/s...d.php?t=259859 |
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#43 |
Registered User
Join Date: Jul 2014
Location: Chico, California
Posts: 941
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Re: Converting factory AC to use R134a
My Old Air Products order arrived today. New compressor, condenser (not pictured), drier, POA update, and tubes/hoses. Now I just need some time to work on it.
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#44 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Re: Converting factory AC to use R134a
I converted mine to 134 and here are the part numbers in the write up. I got a Sanden compressor for the Serp Set Up and had an Orfice Tube ran, new lines made, put a pusher fan on the old condensor and wired it into the electric fan circuit relay. Been running it for over three years with no problems. Everthing inside is the same, everything outside is a little modified...Gets to about 40 degrees in the cab. Used it in NC with ridiculous humidity and high 90's.
http://67-72chevytrucks.com/vboard/s...d.php?t=468729 Smitty
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#45 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Converting factory AC to use R134a
FWIW, POA update,is a POS in my oppinion. Stay with the genuine POA AND ADJUSTMTO 26 psi. Test rig is easy to fabricate. I tested my original POA and is fine. Calibrated to 29.5 psi for R-12. Next chance imget, the POA update is coming out in favor of the POA.
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#46 |
Registered User
Join Date: Jun 2013
Location: Waterloo IL
Posts: 49
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Re: Converting factory AC to use R134a
I did the 134 POA adjustment to 26 PSI on my 70 Chevelle and installed a brand new GM compressor along with drier, seals, and hoses (not a reman) and it worked great the entire time I was running it. Prior to that I had the tube. It constantly cycled and cooling would instantly stop when it kicked off. I would avoid the tube if possible. Just my experience.
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#47 |
Registered User
Join Date: Mar 2011
Location: Brandon,Iowa
Posts: 391
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Re: Converting factory AC to use R134a
Hello !! I have a 72 C20 that I am going to install a serpentine set-up from a 95 chevy pickup.
I understand that I need to change out the receiver/dryer. I bought the cycling P O A valve for 134 http://www.classicparts.com/1967-72-.../#.VW5tfGfbJLM Can I run the same compressor that was on the 95 chevy in my 72 with 134 ? I will have to get hoses made to fit the newer compressor if I can run that compressor. Thank you in advance for any and all help and advice !!! Tom |
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#48 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Call these guy's they know there AC stuff and have kits for our trucks. I had their system for over 10 years with no problems.
![]() http://www.classicautoair.com/
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#49 | |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Converting factory AC to use R134a
Quote:
BTW, sorry about the terrible previous post by me...did it on my phone. |
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#50 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Converting factory AC to use R134a
Quote:
I have a couple of questions if someone could address them: - Would an AC shop need to pull apart under my dash, or in the heater core area that would require pulling a fender? I have brand new paint. It looks like the inboard section of the underhood HVAC box comes off. But are all the parts in there? - When I buy a new pump and dryer from LMC, as I did, it has some oil in it. Would that be the old style or new? I poured it out but did not flush it. Just a reminder - this thread is (or was supposed to be) about converting factory air, not replacing it with aftermarket serpentine chrome modern pumps or Vintage air.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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Tags |
134a, a/c, air conditioning, r134, r134a |
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