Air Conditioning 1 can low - but which to add?
Thread Starter
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Air Conditioning 1 can low - but which to add?
So my AC works but is a can low. Compressor kicks in for a bit but cycles too quickly. Gets cold a bit but could go a lot more.
What I don't know is what's in there. After all this time, my guess is R134- but its just a guess.
The system does not have any conversion fittings.
I have cans of R12 and R134.
Is one universal to both? I would like to avoid a full on evac and refill.
Which one would you add, if at all, not knowing what is in there?
I did a lot of looking on the interweb. Seems like everything else these days- two camps.
What I don't know is what's in there. After all this time, my guess is R134- but its just a guess.
The system does not have any conversion fittings.
I have cans of R12 and R134.
Is one universal to both? I would like to avoid a full on evac and refill.
Which one would you add, if at all, not knowing what is in there?
I did a lot of looking on the interweb. Seems like everything else these days- two camps.
Last edited by Tootie Pang; Nov 21, 2017 at 08:44 AM.
Joined: Aug 2008
Posts: 410
Likes: 38
From: Lansing, Mi
Car: One owner '88 IROC 50k
Engine: L98 with bolt ons.
Transmission: T56
Axle/Gears: 3:42 again
Re: Air Conditioning 1 can low - but which to add?
If it doesn't have the conversion fittings I would assume it's still R12
Joined: Jan 2003
Posts: 330
Likes: 27
From: Raymond, Wi
Car: 87 Formula, 91 Trans Am
Engine: 355 tpi, 305tpi
Transmission: 700r4, 700r4
Re: Air Conditioning 1 can low - but which to add?
You cannot use 134 in an R12 system that as not been evacuated. If the fitting is still a thread style you have R12 and need to use up the R12 you have. If there is a quick connect style fitting, the system has been converted to R134 and you will have to use that. They made the fittings incompatible so you couldn't mess it up. Good luck!
On Probation
Joined: Apr 2007
Posts: 1,592
Likes: 18
From: Syracuse NY
Car: 84 Z-28
Engine: 305 HO
Transmission: r-700
Axle/Gears: 3:73
Re: Air Conditioning 1 can low - but which to add?
Just see which fill/test port you have.
Attach a set of gauges and check.
OR:
Better off hitting a A/C shop if you have no experience.
Attach a set of gauges and check.
OR:
Better off hitting a A/C shop if you have no experience.
Thread Starter
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Air Conditioning 1 can low - but which to add?
I have some experience. Probably better just to have them vac it and start fresh.
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On Probation
Joined: Apr 2007
Posts: 1,592
Likes: 18
From: Syracuse NY
Car: 84 Z-28
Engine: 305 HO
Transmission: r-700
Axle/Gears: 3:73
Re: Air Conditioning 1 can low - but which to add?
Those little cans of R-12 are gettin pricey as well as the 20 pounders.
But still can be found.
Even if he still has the R12 system there are several b*stard gasses
they can use as a R-12 sub. Check fleabay.............
They sell in the little cans too.
Check here: genuine r-12
http://www.ebay.com/sch/i.html?_from...erant&_sacat=0
Get a set of r-12 gauges and put in a pound or 2 to get yer a/c frosty!
My 84 came from NC. and the owner down there had the a/c changed
over to r-134. There are a couple foil conversion 134 alert
stickers under the hood.
It worked ok here in NY. I figure you would sweat to death down
south in the summer!
Last edited by sonjaab; Nov 23, 2017 at 09:56 AM.
Joined: Aug 2013
Posts: 4,815
Likes: 906
From: MICHIGAN
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: Air Conditioning 1 can low - but which to add?
I had an '86 Dodge Omni (don't hate) that had working A/C, but it leaked pretty good. I kept it topper off with this, and it worked GREAT.
http://bennettsupply.net/HC-12a.htm
http://bennettsupply.net/HC-12a.htm