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Discussion summary
YOUR RESEARCHAir-Con purple o-ring lube?
Leading reported evidence
Replace a/c condensers
Performed · outcome unconfirmed
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Performed · outcome unconfirmed
When i changed the A/C condensers on my car, my indy gave me a small amount of Aircon system oil to put on the seals so that i didn't install them dry......
Leading evidence: 'Replace a/c condensers' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace a/c condensers' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
there is a special oil you can use but for me all i need is lub so it doesnt catch when installing.
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Suggestion · Original poster
Does anyone know the correct lube to use on the purple o-rings in the air-con system?
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Suggestion
I use the same type for all my O rings when assembling for the engine and AC pipes, I'm not sure if it's the correct type of lube for the AC rings but it is a protection lube to protect against oil and other corrosive chemicals and stops the O ring degrading, it also helps assembly.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Replace a/c condensers
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
When i changed the A/C condensers on my car, my indy gave me a small amount of Aircon system oil to put on the seals so that i didn't install them dry......
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I use the same type for all my O rings when assembling for the engine and AC pipes, I'm not sure if it's the correct type of lube for the AC rings but it is a protection lube to protect against oil and other corrosive chemicals and stops the O ring degrading, it also helps assembly.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T124345Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi,
Does anyone know the correct lube to use on the purple o-rings in the air-con system? I believe they are made from Hydrogenated Nitrile Butadiene Rubber (HNBR)
Thanks
Steve
I use the same type for all my O rings when assembling for the engine and AC pipes, I'm not sure if it's the correct type of lube for the AC rings but it is a protection lube to protect against oil and other corrosive chemicals and stops the O ring degrading, it also helps assembly. Its O Ring Silicone Grease and a little goes a long way.
When i changed the A/C condensers on my car, my indy gave me a small amount of Aircon system oil to put on the seals so that i didn't install them dry...... he's a top bloke like that -plus he knew that as the guy regassing it, it would reduce the chance of leaks from a a damaged seal!
Toohey
At work i just use some of the a/c oil .. Pag 45 i belive .. there is a special oil you can use but for me all i need is lub so it doesnt catch when installing.
The seals are designed to swell up with a/c oil so you lub and fit .. thats also why its best not to reuse old seals.
green or purple .. its all the same.
Thanks, I've ordered some PAG 46.
The joint forward of the rear right wheel was leaking. There was corrosion in the aluminium fitting which I think was pushing the fitting open a little. All cleaned up so hopefully will seat correctly and not leak.
I had this on my 996 C2. One of the bolts was an absolute pain to remove. Cleaned up, new o-rings and bolted back together. Still got ice-cold air con 2 years later.
MC
Yep, the area where the seal sits looked fine.
Good to know, thanks. Mine was leaking from the larger pipe, the bolt for the smaller pipe looked very hard to get onto due to its proximity to the body so I left that one alone.
Anyone know the sizes of the O-Rings? I bought mine from Porsche which wasn't cheap but whilst searching for o-ring lube found selection boxes of the purple & green ones for less money......
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