AC Conversion Questions

[Kilian]

Hey folks, converting the old R12 system to R134a and I've searched a lot on this site and had some of my questions answered, but have these two remaining.

1. Orifice tube. It's normally suggested to replace the tube. If I look in the ACDelco online catalog, I see several orifice tubes that are recommended for my truck (based on climate, etc.). Are all orifice tubes that are sold new compatible with R134a? (Not an older NOS tube, but something manufactured today as an ACDelco replacement part).

2. Seal Ring Conversion kit - Similar question. There is an ACDelco kit (15-2551GM) for O-ring and seal replacement. If newly made, can I assume that these O-rings are R134a compatible?

Thanks for the help!

 

[1lejohn]

I think the green O rings are compatible with R 134. Thats the ones I have used and have not had any problems. I'm not sure on the orifice tube. I just put in the severe duty one. It seems to work fine here in SE Texas.

 

[Hunter79764]

To my knowledge, all orifice tubes are "compatible" with 134, it's just a matter of what is the right size. If it's a single cab truck, in Wisconsin, I don't think you have a bad option, anything will work out ok, so probably just stock replacement, which I believe is white?

 

[AuroraGirl]

I think the green O rings are compatible with R 134. Thats the ones I have used and have not had any problems. I'm not sure on the orifice tube. I just put in the severe duty one. It seems to work fine here in SE Texas.

pag oil is a must, the green ones are indeed compatible with r134a


If you would like the TSB gm issued for 1987 R/V trucks -1991 burbs/blazers , and every other vehicle basically they made 1984-1993 lol

It has a lot of specifics for the trucks, which a 1987 will be fundamentally similar to a 1983