Changing AC freon

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Jul 29, 2007 | 09:01 PM

John1973

Thread Starter

Heel & Toe

Joined: Jun 2007

Posts: 24

Likes: 1

Changing AC freon

When converting the AC from R-12 to R-134a do you have to change the O rings and drain the oil from the compressor? The compressor is original.

Jul 29, 2007 | 09:22 PM

Green73

Racer

Joined: Oct 2006

Posts: 473

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From: New Port Richey FL

I would evacuate the old system and put in the new freon/oil and run it like that. If you have a problem, then look into replacing o-rings. (yes, to do it the right way, you should replace the o-rings)

Jul 29, 2007 | 09:37 PM

IrishJoker

Drifting

Joined: Jul 2005

Posts: 1,891

Likes: 2

From: Baltimore MD

Drain the old system, replace the freon and oil with R134 and try it out. If you have no leaks - then you don't have a problem. I bought R134 with a dye that shows up under ultra violet (shows up as yellow/green) - so far no leaks in my system

Jul 29, 2007 | 09:48 PM

SmokinBBC

Drifting

Joined: Mar 2006

Posts: 1,526

Likes: 2

From: Oak Ridge NC

I am not sure, but I think you also need to replace the drier. Perhaps there is more on this in some old threads.

Jul 30, 2007 | 01:43 PM

71 Green 454

Le Mans Master

Joined: Jun 2006

Posts: 6,399

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From: Tampa Florida

Evacuate system, change compressor oil, flush system, replace drier, replace O-rings, install R134a adapters, vacuum system, charge with R134A using 80% of the R12 amount specified.

You might want to read this, it has some good information regarding the POA valve.

http://www.autoacforum.com/messagevi...&threadid=7567