5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOil leak - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
small crank case vent valve o-ring
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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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.
Discussions that report identifying a cause
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.
Reported cause
My leak turned out to be a small crank case vent valve o-ring.
Oil leak - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'small crank case vent valve o-ring' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'small crank case vent valve o-ring' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean floor , and today - still' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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.
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.
Oil leak - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use very inexpensive smoke machine, the autoline pro
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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.
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
I used a very inexpensive smoke machine, the Autoline Pro.
Oil leak - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace cut open oil filter - very
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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.
Discussions that contain suggestions
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.
Suggestion · Original poster
Car runs great , recent oil change , cut open oil filter - very clean .
Oil leak - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace valve
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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.
Discussions that contain suggestions
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.
Oil leak - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run ten
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
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.
Suggestion
Close off the intake at the throttle body and the exhaust with rubber gloves and let the smoke machine run for ten to fifteen minutes to build pressure.
Oil leak - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
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.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T082735Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have a 2003 986 with 40 k , within the last few months it’s developed a dollar bill size oil leak on the passenger side rear near the rear drive axel . The leak only appears after driving at higher rpm’s . If it just sits , and , or runs at lower rpm’s , no leak . I have had it up on jack stands and can not find where it’s leaking from . Dust plate removed . Not the oil fill pipe . Not the air/oil separator . My question is valve covers or gasket . Not sure where to look for that gasket . Car runs great , recent oil change , cut open oil filter - very clean .
I have questioned that . The car is an automatic.. When you say transaxle oil is that going to be the same as transmission fluid ? . I know it’s not trans fluid. If it is transaxle oil , How can I tell the difference between it and motor oil ? … sure smells like motor oil , looks just like the motor oil I just changed . Would transaxel oil only leak after higher rpm’s , or after being driven . If the car just sits it does not leak , only after being driven … I can leave in park , rev up rpm’s and see if there is a leak . Thank you for your time .
I can't tell you where the leak is, but I can tell you how I found a very similar leak that only happened after a spirited run. I could run it all day in the garage and it would not leak but after a good run under load, it left a good puddle under the car. I used a very inexpensive smoke machine, the Autoline Pro. The nozzle fits perfectly into the oil dipstick tube. Close off the intake at the throttle body and the exhaust with rubber gloves and let the smoke machine run for ten to fifteen minutes to build pressure. My leak turned out to be a small crank case vent valve o-ring. Replacing the valve fixed my oil leak. I would have never found it without a smoke machine.
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Thank you for suggestion. I have a buddy with a lift . I want to get it up there before trying something like smoke . I am hoping that I might be able to see something better standing then on my back .. I did run at in the garage yesterday, ran up rpm’s , and there was a small amount of oil afterward . Cleaned the floor , and today - still clean . Let me get this on a lift to see if I can figure where it’s coming from and will see about revisiting forum . If others have ideas would like to hear from Thank you much .
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