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Guest Message by DevFuse

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***No discussion,sizes only of A/C air conditioning compressor oring o-ring sizes conditioner

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4 replies to this topic

#1 grossgary


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Posted 18 June 2013 - 05:02 PM

*** No discussion or comments, goal is one thread with A/C oring sizes compiled for easy access.

I'll edit this thread with any updates as long as I'm allowed.


The compressor orings are notorious for degrading faster than the others, they are usually hard/brittle and the rest in the system are still fine.  I've never seen the other orings be that way so they're not that important but list them if you do them.


Year, Model, Engine, A/C compressor brand:


1999 Impreza 2.2, ZEXEL:

Compressor:  17.8mm x 2.5mm

Compressor:  10.8mm x 2.4mm

Drivers side condensor:  10.8mm x 2.4mm



2003 3.0 H6 OBW (stock OEM compressor)

Top-rear Compressor:  17.8mm x 2.5mm
Left ('high') side Compressor:  10.8mm x 2.4mm

Edited by grossgary, 19 June 2013 - 07:47 AM.

#2 lmdew



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Posted 18 June 2013 - 06:09 PM

I usually end up taking them to the dealer and matching them.  Even the dealer books are not so good.

#3 1 Lucky Texan

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Posted 18 June 2013 - 07:31 PM

2003 3.0 H6 OBW (stock OEM compressor)




top-rear Compressor:  17.8mm x 2.5mm

left ('high') side Compressor:  10.8mm x 2.4mm


used the blue/green w'ever 'variety pack' o-rings from O'reilly's



used some wire to hold the throttle and CC cables 'up-and-back'. i also
pulled the electrical connection and tucked it under out of the way.
Used a rag/paper towels to clean up around the areas. I pulled the top-rear fitting
and used a toothpick to get the old o-ring off. It was much less
flexible than the replacements and deformed/flattened. The large o-ring
mentioned was a good fit. I lubed it with a little oil that was sitting
inside the compressor. Then I did the same on the left-side fitting
(high side). The o-ring was a little more difficult to remove. It was
also stiff and deformed/flattened. I think the 10.8mm x 2.4mm is the
best fit here.

#4 forester2002s


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Posted 28 June 2013 - 04:27 PM

2002 Forester 2.5 MT (stock OEM compressor):


- LP side o-ring: Subaru #73039TA0120 (21.50 mm OD; 16.80 mm ID)

- HP side o-ring: Subaru #73039TA0140 (15.80 mm OD; 11.10 mm ID)

#5 Fairtax4me



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Posted 04 June 2014 - 08:45 PM

1995 Legacy 2.2 with Zexel compressor

Compressor High: 10.9mm x 1.9mm
Compressor Low: 13.7mm x 1.9mm

Condenser LH side: 10.9mm x 1.9mm
Condenser RH side: 6.07mm x 1.7mm

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