R-134a Conversion

Reply Subscribe

Thread Tools

Search this Thread

Mar 27, 2000 | 09:47 AM

Rob88

Thread Starter

Freshman User

Joined: Feb 2000

Posts: 28

Likes: 0

R-134a Conversion

Spring is here, almost. Has anyone had good success converting their a/c to R-134a? My 1988 F-150 302/AOD which I bought used, had no freon in the a/c system. I added 1 can of R-134a to it and the pressure is not budging, hopefully indicating no leak. How many 14oz cans of R-134a can I add (including the 8-1/2 oz oil charge which comes with 3 oz of R-134a)?
Thanks

Rob

Mar 27, 2000 | 10:38 AM

PAUL_2

Postmaster

Joined: Jul 1999

Posts: 3,172

Likes: 4

R-134a Conversion

Rob ,
You added R134 to an R12 A/C system ? Those 2 refrigerants are not compatible with each other . Maybe I misread your question but it reads like you have a R12 system and are looking for info on converting to R134 . I assume your truck has not been converted yet ?
Paul

Mar 28, 2000 | 09:24 AM

Rob88

Thread Starter

Freshman User

Joined: Feb 2000

Posts: 28

Likes: 0

R-134a Conversion

The A/C was empty. I put a gauge on the low-pressure side and it read zero. I assumed that all of the freon had slowly leaked out. I then added 1 14oz can of R-134a which the system appears to be holding (Pressure stable, i.e. no leak). My question is, how many cans of R-134a can my system hold, including the can of poly-oil that I will need to add.
Thanks
Rob

Mar 28, 2000 | 11:04 AM

Katt

Senior User

Joined: Jun 1999

Posts: 296

Likes: 0

R-134a Conversion

Well, the problem is any oil left in the R12 system is not compatible with the oil for r134. You need to have the system flushed by an AC shop. You really should also replace all the o rings. I just talked to a shop about doing mine, and they said to stick with R12, said it cools a bit better, and stays in the system longer then R134 does.
Good Luck

Mar 28, 2000 | 11:09 AM

Katt

Senior User

Joined: Jun 1999

Posts: 296

Likes: 0

R-134a Conversion

One more thing, you can have the shop charge the current system with "Freeze 12", which is cheeper then R12, but cools the same and is compatible with the current system.
Good Luck