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85 ac oring p/n

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Old Aug 17, 2025 | 09:55 PM
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Default 85 ac oring p/n
Need the oring pn for the hight side to the condenser. Not shown on the parts book.
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Old Aug 17, 2025 | 10:49 PM
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What ID is required? .426 would be a 3094214. That's a fairly common o-ring for a GM condenser of the times.
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Old Aug 18, 2025 | 09:20 AM
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Anybody know what material the A/C O-rings are made of? I'm @$$uming viton....
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Old Aug 18, 2025 | 05:58 PM
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I measured the o-ring to condenser, its .290id. The one you mention is for the 1988 and newer c4s.
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Old Aug 18, 2025 | 06:45 PM
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Originally Posted by johnfin
I measured the o-ring to condenser, its .290id. The one you mention is for the 1988 and newer c4s.
Do you believe it to be the same as #17 in your image?
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Old Aug 18, 2025 | 09:36 PM
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Its not the same. Thats larger, the p/n you gave me.
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Old Aug 18, 2025 | 10:24 PM
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Originally Posted by johnfin
Its not the same. Thats larger, the p/n you gave me.
You're the guy that needs and I'm sure there are vendors that you could 'walk-in' and get an appropriate fit. I've never seen a GM A/C o-ring with the ID you mention measuring. If you measured the o-ring, what color was it? The more popular earlier/mid 80's would be a 3093111.
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Old Aug 19, 2025 | 07:31 AM
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Its black just like the number you provided. I believe thats the one, thanks.
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