5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

R12 to R134a?

Old 07-07-2006, 05:25 PM
  #1  
VigCS
5th Gear Member
Thread Starter
 
VigCS's Avatar
 
Join Date: Jun 2005
Location: Frederick, Maryland.
Posts: 2,118
Default R12 to R134a?

I need AC! it's broken in my stang...

I don't know if I should try to fix the leak and use this freeze 12 stuff or convert to r134a and use that. Suggestions?

Thanks!
VigCS is offline  
Old 07-07-2006, 05:30 PM
  #2  
sgt_pepper17
2nd Gear Member
 
sgt_pepper17's Avatar
 
Join Date: Oct 2005
Posts: 223
Default RE: R12 to R134a?

I believe 12 works better, but 134 is cheaper.
sgt_pepper17 is offline  
Old 07-07-2006, 05:46 PM
  #3  
r.barn
6th Gear Member
 
r.barn's Avatar
 
Join Date: Feb 2006
Location:
Posts: 5,263
Default RE: R12 to R134a?

you can get your R-12 fixed, it just cost more to get it worked on.

R-134 will be cheaper to maintain in the future but cost alot to convert
and R-134 doesnt cool as much.

or try the Freeze 12 stuff, supposedly it works.
r.barn is offline  
Old 07-07-2006, 05:49 PM
  #4  
Hawk
3rd Gear Member
 
Hawk's Avatar
 
Join Date: Apr 2006
Location:
Posts: 551
Default RE: R12 to R134a?

I used the R134a kit that you can get at walmart for around $30 and used that to not only charge my system, but convert from R12. (Has been working fine since.)
Hawk is offline  
Old 07-07-2006, 08:48 PM
  #5  
Twisted
5th Gear Member
 
Twisted's Avatar
 
Join Date: Feb 2006
Location:
Posts: 3,768
Default RE: R12 to R134a?

ORIGINAL: Hawk

I used the R134a kit that you can get at walmart for around $30 and used that to not only charge my system, but convert from R12. (Has been working fine since.)
What was involved in installing the kit? Was it easy? I just found out that it will cost $450 to have my system converted and charged. Will the kit address the problem of potential leaks in the system? Thanks Hawk.
Twisted is offline  
Old 07-07-2006, 10:47 PM
  #6  
Hawk
3rd Gear Member
 
Hawk's Avatar
 
Join Date: Apr 2006
Location:
Posts: 551
Default RE: R12 to R134a?

I will be honest, my dad is a mechanic and had a full set of gauges to keep on eye on the pressure. But the kit did work. I just bought the kit, bled off all remaining freon, and then followed the directions step by step. The only step I didn't follow involved charging the system with the r134a freon. Basically I believe the kit came with a can of oil, and 2 cans of r134a freon. The instructions wanted me to use up both cans of r134a, but when my dad had the gauges on the system, he had me stop after 1 can. The reason being he said the pressures were getting to high and would probably blow the system. Other than that though, it was smooth sailing. I know that the consensus and general automotive world says that to convert from r12 to r134a, the individual must replace the dryer, condenser, etc. However, I was in the same boat as you, my old system was failing, so I had nothing to lose if the $30 fix didn't work. I might have just been lucky, but I have had no problems and the car has blown cool. Worth a shot.

Good luck.
Hawk is offline  
Old 07-07-2006, 11:03 PM
  #7  
fordboyyfm
2nd Gear Member
 
fordboyyfm's Avatar
 
Join Date: Jun 2006
Location:
Posts: 244
Default RE: R12 to R134a?

Yeah just buy the kit, its cheap. do you know what it is thats leaking. i know the kits we use at work come with a whole bunch of new orings, so if thats the problem youve fixed it. also be sure to replace the orfice tube. they always get all clogged up and can hurt things. Hawk that may have been your problem with too much pressure if you didnt change it, dont know how big of a can you were using, but the ones im thinking of arent too big and you would have needed two.
fordboyyfm is offline  
Old 07-07-2006, 11:20 PM
  #8  
ZachW04Stang
5th Gear Member
 
ZachW04Stang's Avatar
 
Join Date: Jul 2004
Location: Westminster, MD
Posts: 4,343
Default RE: R12 to R134a?

I had the r134 swap kit, the r134 refridgerant leaked out of every seal after the swap. Its way to thin to put in an old ac system designed for r12. It might work, it might not.
ZachW04Stang is offline  
Old 07-07-2006, 11:31 PM
  #9  
Twisted
5th Gear Member
 
Twisted's Avatar
 
Join Date: Feb 2006
Location:
Posts: 3,768
Default RE: R12 to R134a?

ORIGINAL: ZachW04Stang

I had the r134 swap kit, the r134 refridgerant leaked out of every seal after the swap. Its way to thin to put in an old ac system designed for r12. It might work, it might not.
I just found out that my car has already been converted to R134! See my other post for the drama. At any rate, how difficult is it to replace every seal that might leak--as a worst-case-scenario? Also, is it true that, even if tightly sealed, R134 systems must be recharged every two years or so? Thanks for the info, fellas.
Twisted is offline  
Old 07-08-2006, 12:12 AM
  #10  
PRO50SC
The Rogue Mod
 
PRO50SC's Avatar
 
Join Date: Feb 2006
Location: Maryland Sucka's!!
Posts: 21,918
Default RE: R12 to R134a?

Use the freeze 12, it will work just like the r-12. You'll be very happy. I've used it in cars for several years now w/o any problems.
PRO50SC is offline  

Thread Tools
Search this Thread
Quick Reply: R12 to R134a?



All times are GMT -5. The time now is 04:39 PM.