2000 Jeep Cherokee Sport a/c o ring identification needed

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I’m replacing my compressor, accumulator and one line in my system. The kit contained “all” of the needed o rings. Except for the one at the outlet of the accumulator. This is the one on the compressor hose that has the teardrop shaped flange with a bolt hole. None of the mopar dealers are any help…..too old. I have tried online but can’t find a good part number or even an exploded view to identify it. Any help with a Napa/autozone/ advance number or other supplier would be greatly appreciated. Thanks

[Cornbinder89]

I might have some help for you but not sure. I have an old "truck air" catalog that goes up to 1997 and list two different accumulator gaskets, they claim there are two different ones in use and you have to pick which one it takes based on the bolt hole pilot. the "large pilot is .437" and takes gasket 3857083 (OEM) or 16-4305 (truck-air number) the one with a small pilot .377" is 4720747 or truck air number 16-4306.
Being this catalog DOESN"T go up to 2000 it might not be either of those numbers, but that is the best I can find at the moment. If I find my newer book I'll see what it says.
Both are used concurrently and the book recommends shops to stock both.

Does it look like the above?
MT0038 is what comes up on Autozone's web catalog for a 2000 Jeep, similar to the above picture but different number. It is also in a kit with a small O ring which looks like it would be for the accumulator. The Part numbers are Santech numbers.

[Cornbinder89]

Chrysler Metal Standard Block Filter Drier .473 Bolt Hole (5 Pk) | Air Components
The above has cross reference numbers

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This is the connection in question. There was no gasket. I placed a smaller o ring on the line to show the location of the o ring I need. The accumulator is the replacement, but the connections are identical to Oem. Also, the bolt has no groove for the suggested gasket.

[Cornbinder89]

What happened to the original O ring? use it to size a replacement/ That is all I can offer as the gasket shown is all that come up in catalogs. O rings are O rings, you just need one of the correct size and diameter You can from the old one.
Only other thing I can offer is to buy a bunch of O rings around the size you have (a little bigger in steps) and try until you find one that fits the groove and is compressed a bit when installed in the drier. An auto parts store or a hardware store should have an assortment of O rings. I used to have such and assortment on my service truck for hydraulics

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The old o ring is gone. I had to cut it off and didn’t save the pieces. Figured that the kit had all of the o rings. Guess I will mic the bottom and width of the fitting groove and try to figure it out that way.

[Cusser]

O rings are O rings, you just need one of the correct size and diameter.

O-rings for AC use are different material, like green NBR, resistant to refrigerants.

An auto parts store or a hardware store should have an assortment of O rings.

O'Reilly and Autozone sell packs of assorted refrigerant O-rings. I've found stores like CarQuest, NAPA have historically had little drawers of individual refrigerant O-rings.

[Cornbinder89]

Yeah, the green ones are a little better, but there are a lot of cars running around with BunaN O rings and anyway, it is a cheap way to find out what size you need.
When I needed a O ring for a turbo feed line, A std O ring was used for size before getting the much more expensive Nitrile ring.
It is a good learning experience, Save when disassemble to match up on assembly.
The green and yellow are a little bit more resistant to Pag and ester oils, but only if they are not counterfit dyed bunia N
I've got a few running with black O rings and no leakage, It was what was in the seal kit.

[Tom Greenleaf]

Cornbinder89 put a link for a pack of them. > Chrysler Metal Standard Block Filter Drier .473 Bolt Hole (5 Pk) | Air Components < or is that 5 wrong ones for you?

>>Quote from top "Mopar is of no help" << Aren't they special!!

At a glance I don't know for sure if that is the seal you seriously need or there to keep junk out of pic of the green one you posted.

The obvious would be if you could bring the old one with you to a Mopar dealer and match it up. I too am not as worried about compatibility if new it SHOULD be tolerant of any type oil or refrigerant? No promises on that.

My guess for little value is any difference might be if it had dual A/C as in for the rear IDK if they offered that seems Mopar didn't even ask or if doing that all on line it's a failed spot for parts on their part left uncorrected?

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Found one! Went Napa with a tape measure and bought the o rings that seemed closest to my estimation. Then went home and installed the best fit. System held vacuum and now blows cold like new. Thanks all for your help.

[Cornbinder89]

Glad it worked out. Thanks for getting back with us and letting us know how it ended, too often we never know if we helped or not.