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Oil Leak - Driver's Side (not RMS)?

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8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHOil Leak - Driver's Side (not RMS)?

Leading reported evidence

Replace when my clutch was done

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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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 · Original poster
Had it replaced when my clutch was done.
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Oil Leak - Driver's Side (not RMS)?

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Leading evidence: 'Replace when my clutch was done' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace when my clutch was done' (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.

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1 matching discussions · 8 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace when my clutch was done

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 · Original poster
Had it replaced when my clutch was done.
Original post Read captured discussion
Oil Leak - Driver's Side (not RMS)?

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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.

Rennlist: 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: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a small oil leak, on the driver's side (U.S., left hand side). It seems to come from the front of the engine, but not where the transmission meets the engine. Instead, it seems to come from NEXT to the transmission somewhere, but I can't tell where. It runs down the engine, and collects as shown in the picture. I get maybe a few drips per day on the garage floor. It is not coming from spark plug tubes; I just did those. It's a '99 C2. with 53k miles. Thanks for the help.

POST 2Original post

can you say AOS? Looks like it wont be failing right after doing the next big job

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 7953561

Thanks Ed, Your AOS comment earlier today is what reminded me to post this picture. Thought it might be an AOS thing. Anyone else have a different theory?

POST 4Original post

Can you chase the seepage all the way to the top of the engine (to where the AOS is)? JP

POST 5Original post

My bet is the bellows that connects to the AOS is torn. Rick 99 996C4 87 944S

POST 6Original post

AOS most likely. Could also be cam advance solenoid leaking at the seal. Least likely would be the scavenger pump, looks like there is oil higher than the scavenger pump though.

POST 7 / ORIGINAL POSTEROriginal post

It turns out my oil leak was the Air Oil Separator (AOS), as predicted by the gurus here. Had it replaced when my clutch was done.

POST 8Original post

Yep oil was coming out of the vent just above your picture location.

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