John Ha

iTrader: (1)

Hi,

I have an 85 GSL-SE. The AC recently stopped working and I've been looking for a service manual to help me understand the specifics of the system (R12 capacity, components and location, etc.).

The factory workshop manual has nothing in it and neither does the Haynes manual.

To convert to R134 I know the compressor and dryer have to be replaced but don't know what else to look for or even where to find the system capacity (pounds of R12).

I'd REALLY appreciate any help at all (pointer to service manual for the stock system, etc.).

Thanks!

mjm4jc

First, the A/C compressor and the dryer do not have to be replaced to convert to
R-134A, assuming that all the old freon is out of the system. The only time you have to replace the dryer is if the system is opened up. Autozone or Advance auto have R-134A conversion kits that you can buy to convert over. It's real easy. You just make sure all the old freon is out and put the adapter on the low side line and pump in the freon. There is a gauge that will tell you when the system is full. This is an ok conversion, but I recommend something else:

There is a compnay called "Envirosafe" and they make an R-12 replacement freon that is awesome. When you go on their web-site, you can look at all the specs of this freon and how it compares to to R-12 and R-134A. It is far better. I used it on my chrysler, and the stuff was so cold that it hurt. They recommend getting all of the old freon out of the system before using it, but it is not absolutely necessary. This stuff is compatible with the other freons. I strongly suggest using this product, since it will cool far better than 134. Let me know if you have any qeustions about this stuff, and I'll try to get youy an answer.

Mike

Vashner

There was a big thread on this recently with lot of good nfo.

Rx-7Doctor

iTrader: (13)

I can't even begin to think about A/C right now. The average temp outside has been around 28-30 degrees. :-)

As far as freon capacity. Contact your local auto parts store. In their paper catalogs there is a section that gives all of this information.

ChaosAura

also, chances are if your a/c isn't working there is a leak in the system somewhere, so anything you put in, won't stay in for all that long.

mjm4jc

You are right. I recently fixed two A/C systems with some of the new stop-leak products that can be purchased at NAPA or Advance. Both cars have not been leaking for 4 months now.

ChaosAura

I really would never use any stop-leak or the like (A/C or coolant stop-leak)

its good for something temporary, if you can flush it out quickly after.

My advise is to take it to a shop that works on A/C, at least to have them check out if its leaking anywhere, and fix that leak.