I bought a complete o-ring kit from AZ and it appears to not have the correct o-ring size anywhere int he package. I do not have the originals to compare. Does anyone have the specs on those two on tha back where the lines connect?

Here's a link to a post on AC o-rings: https://www.fiero.nl/forum/Forum2/HTML/085492.html
Includes p/n for several brands of o-rings for compressor / service ports.

Am I to think the one labeled "Hose Blk" is the one referring to the ones I am talking about on the back of the compressor that mate to the aluminum hose block? This shows the diameter, but not thickness. I think I have a pair the right diameter, they just seem to thin. I think I might have to go to the dealer for the right one?

I went to my local dealer to get the correct o ring. Guess what? They only have a listing for the two where the hoses connect to the hard lines behind the drivers seat. NOTHING ELSE.
Good luck
Joe Crawford
Texas

[This message has been edited by josef644 (edited 07-18-2008).]

GM found that the new design worked better, even on earlier compressors so the round ones were discontinued (NLA = No Longer Available). Aftermarket suppliers still sell both types.

In 1992, GM started using sealing washers instead of o-rings. Older compressors have a groove around the manifold ports to position the o-rings, but the sealing washers are centered by bushings in the manifold block. The manifold gasket surfaces of a sealing washer compressor are flat (no grooves).

O-rings can't be used on a sealing washer compressor and vice versa.

[This message has been edited by spark1 (edited 07-19-2008).]

I thought HR6s used the metal/ rubber washers.... I could be wrong

quote Originally posted by Jrgicehc: I thought HR6s used the metal/ rubber washers.... I could be wrong

Sealing washers were used starting in 1992 and were not used on all compressors until 1994. The HR6 replaced the DA6 starting with the 1988 model year.

Based on one comment I can't get the right o-rings from a dealer. AZ only has generic packs. Where can I get the right ones?

I went to a Federated Auto Parts store here and asked for the fatter version of the o-rings I had, which were for the condenser. The guy went back and got exactly what I needed.

Now I need to go back and get the fatter o-rings for the connection behind the driver's seat. And the connection under the spare-tire well. And perhaps the orifice tube connections, and accumulator connections...crap, I thought I was almost done.

By the way--my new HR6 compressor uses the washers. I like them a lot more than the o-rings in the older compressors.

According to ACDelco, the 15-30169 suction/discharge o-ring fits 5,326 car models made between 1966 and 1993. Shouldn’t be hard to find them.

The GM o-ring kit sold by Arizona Mobile Air contains 10 of the suction/discharge o-rings. They look like the ones sold by 4-Seasons (green) in the ad photo. The Four Seasons p/n for the oval ring is 24619. If you want the old fashion round one, it’s p/n 24632.

Most auto parts stores carry either ACDelco or 4-Seasons parts.

quote Originally posted by spark1: GM found that the new design worked better, even on earlier compressors so the round ones were discontinued (NLA = No Longer Available). Aftermarket suppliers still sell both types. In 1992, GM started using sealing washers instead of o-rings. Older compressors have a groove around the manifold ports to position the o-rings, but the sealing washers are centered by bushings in the manifold block. The manifold gasket surfaces of a sealing washer compressor are flat (no grooves). O-rings can't be used on a sealing washer compressor and vice versa.

Wow. I may have had the right ones all along. After seeing your post I had another look at the o-rings I thought were wrong. The appear oval. The thing that made me think they were wrong was that they seemed almost too big in diameter to go in the grooves. They left barely fit the groove and left a gap in the inner edge. Seems your diagram says they are supposed to be that way.

OK. Just to make sure. Here is a photo of the o-ring I now think goes in the back of the compressor. Note how without coaxing it will not lay in the groove.


Here is what it looks like when coaxed in to the groove. It leaves a gap in the inside like your diagram above.


BTW- pls don't mind the hairy compressor. It is the junk one from the car

That appears to be correct. Here's a side-by-side comparison of the 4-Seasons o-rings:

[This message has been edited by spark1 (edited 07-23-2008).]