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Oil Separator

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Original source
11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHOil Separator

Reported or suspected cause

emissions one

Reported cause

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context

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 · Original poster

I asked which of the "separators" they changed & he indicated it was the emissions one.

Oil Separator
Frequently discussed work

Replace & he indicated it was the emissions one

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

I asked which of the "separators" they changed & he indicated it was the emissions one.

Oil Separator
Read full discussion summary

Leading evidence: 'emissions one' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'emissions one' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace & he indicated it was the emissions one' (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.

Read captured replies

1 matching discussions · 11 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace & he indicated it was the emissions one

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

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

I asked which of the "separators" they changed & he indicated it was the emissions one.

Oil Separator

Replace twice

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

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 had mine replaced twice under warranty and my dealer told me it was a common problem for 996's. Since a bad oil separator does affect emissions, I'd suggest your friend push to have it fixed under the emissions warranty which, by law, runs longer than the standard warranty.

Oil Separator

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Use on each engine

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

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

Two are used on each engine.

Oil Separator

Use since 1998 and is still

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

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

996 107 080 054 is the part number that has been used since 1998 and is still used.

Oil Separator
Frequently discussed actions (7)

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

Replace & he indicated it was the emissions one

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

I asked which of the "separators" they changed & he indicated it was the emissions one.

Oil Separator

Replace 3.6 liter engine there have not been any

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

Other than the change for the 3.6 liter engine there have not been any changes.

Oil Separator

Replace oil separator

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

My parts list does not show any (part number) change for the oil separator.

Oil Separator

Replace twice

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

I had mine replaced twice under warranty and my dealer told me it was a common problem for 996's. Since a bad oil separator does affect emissions, I'd suggest your friend push to have it fixed under the emissions warranty which, by law, runs longer than the standard warranty.

Oil Separator

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

Run from the valve covers

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

It has a couple of breather hoses that run from the valve covers.

Oil Separator

Use on each engine

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

Two are used on each engine.

Oil Separator

Use since 1998 and is still

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

996 107 080 054 is the part number that has been used since 1998 and is still used.

Oil Separator
Reported and suspected causes (1)

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

emissions one

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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 · Original poster

I asked which of the "separators" they changed & he indicated it was the emissions one.

Oil Separator
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.

11 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 · 1 adjusted by outcome qualification.

1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

The dealer fixed it [for > $1K], and claims it's an uncommon failure.

No unique explicit quoted action; no causal link assigned

Generation: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

For those of you with 996s, have you had problems with your oil separator? If so, what were the symptoms and what did Porsche do about it? A friend of mine has 1999, recently off warranty, diagnosed with a bad oil separator. The dealer fixed it [for &gt; $1K], and claims it's an uncommon failure. Other "intel" indicates that there was a known problem with the separator which resulted in an updated part being introduced during 2000, so we're naturally doubting the veracity of the dealer. I've found no evidence of a TSB on the subject, but we're wondering if there is any recourse with Porsche. If any of you have had experience with this particular issue, I'd appreciate hearing from you. thanks, __________________ Mark Hald '77 Euro Carrera 3.0L Coupe <a href="http://members.rennlist.com/hald" target="_blank">http://members.rennlist.com/hald</a> [email removed]

POST 2Original post

You are correct that there does not seem to be any TSBs on the oil separator. My parts list does not show any (part number) change for the oil separator. 996 107 080 054 is the part number that has been used since 1998 and is still used. Two are used on each engine.

POST 3Original post

Actually, there are three parts that PET calls oil separators. Loren, I think the two you are refering to are located in the bottom of the engine case and are internal. I think the purpose is to keep the engine oil from foaming. The third oil separator and the one that causes most of the problems is a plastic part that sits on top of the engine on the driver side. It has a couple of breather hoses that run from the valve covers. I believe this is a recovery system that is part of the emissions system. In any case this part often cracks, which causes a vacuum leak. The DME will try and compensate by richening the mixture but if there is a big leak, it can't and will result in a check engine light coming on. The DME will go into limp mode and the car will be noticably down on power. I had mine replaced twice under warranty and my dealer told me it was a common problem for 996's. Since a bad oil separator does affect emissions, I'd suggest your friend push to have it fixed under the emissions warranty which, by law, runs longer than the standard warranty. Karl

POST 5Original post

I think you're right, it's part of the crankcase ventilation system. The part number is 996.107.023.54 Karl

POST 6Original post

Yeah, Karl you are right. Three different listings with the same description. Other than the change for the 3.6 liter engine there have not been any changes. You are the only one I know (besides Mark) that has had this done. Was your MY99 and early build?

POST 7Original post

No, my car was a Jan 99 build. I hadn't heard of it as a problem before either, but my dealer told me that it is a common problem on 996's. Karl

POST 8 / ORIGINAL POSTEROriginal post

Thanks, guys - great information! I've passed it along to my friend with the '99 996. He's had the dealer fix the problem, and collected the part to show me. I asked which of the "separators" they changed & he indicated it was the emissions one. I'm not sure how/if he'll pursue the suggestion about the longer warranty for emission-control parts. I'll be sure to let you know. regards,

POST 9Original post

I was doing a DE last weekend and it was 103 degrees and my oil started to leak. Someone said it could be this plastic valve. If this is cracked does it cause oil to leak or just a vacuum leak?

POST 10Original post

I didn't have any oil leak from mine but it might depend on where the crack occurs. It works sort of like a PCV value, so it's plumbed into the heads and recirculates the gases and traps any oil in the gas. So it could cause an oil leak if the canister itself is cracked. It is located on the driver's side rear of the engine, close to the transmission. The vacuum leak will throw a Check Engine Light, so if you didn't get a CEL, the oil leak is probably from something else. Karl

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