14 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH1999 996 - Oil in spark plug tubes cylinders 1 and 2
Leading reported evidence
Clean due
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 · Original poster
Had a mid-level rebuild four years ago at 76k (split the case to replace the IMS bearing and shaft with a new Porsche part, had both cylinder heads ultrasonically cleaned due to bad WP failure, did all maintenance items such as chains, tensioners, bearings, with updates where appropriate, etc.)
1999 996 - Oil in spark plug tubes cylinders 1 and 2
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Leading evidence: 'Clean due' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean (the electrodes' (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 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
All of the spark plugs are clean (the electrodes, but the upper porcelain has oil on #'s 1 and 2).
1999 996 - Oil in spark plug tubes cylinders 1 and 2
Replace #2 coil
Suggestion or failed attempt
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 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
This was just scheduled maintenance due to the age/mileage on the coils, I wasn't getting any misfires yet (although I previously had to replace the #2 coil that failed prematurely).
1999 996 - Oil in spark plug tubes cylinders 1 and 2
Replace ims bearing and shaft
Suggestion or failed attempt
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 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
Had a mid-level rebuild four years ago at 76k (split the case to replace the IMS bearing and shaft with a new Porsche part, had both cylinder heads ultrasonically cleaned due to bad WP failure, did all maintenance items such as chains, tensioners, bearings, with updates where appropriate, etc.)
1999 996 - Oil in spark plug tubes cylinders 1 and 2
Replace plugs and coils this past weekend
Suggestion or failed attempt
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 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
Just finished replacing plugs and coils this past weekend.
1999 996 - Oil in spark plug tubes cylinders 1 and 2
Clean due
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 a mid-level rebuild four years ago at 76k (split the case to replace the IMS bearing and shaft with a new Porsche part, had both cylinder heads ultrasonically cleaned due to bad WP failure, did all maintenance items such as chains, tensioners, bearings, with updates where appropriate, etc.)
1999 996 - Oil in spark plug tubes cylinders 1 and 2
Replace #2 coil
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 · Original poster
This was just scheduled maintenance due to the age/mileage on the coils, I wasn't getting any misfires yet (although I previously had to replace the #2 coil that failed prematurely).
1999 996 - Oil in spark plug tubes cylinders 1 and 2
Replace ims bearing and shaft
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 · Original poster
Had a mid-level rebuild four years ago at 76k (split the case to replace the IMS bearing and shaft with a new Porsche part, had both cylinder heads ultrasonically cleaned due to bad WP failure, did all maintenance items such as chains, tensioners, bearings, with updates where appropriate, etc.)
1999 996 - Oil in spark plug tubes cylinders 1 and 2
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.
14 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: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
1999 996 cab. Around 107k. Had a mid-level rebuild four years ago at 76k (split the case to replace the IMS bearing and shaft with a new Porsche part, had both cylinder heads ultrasonically cleaned due to bad WP failure, did all maintenance items such as chains, tensioners, bearings, with updates where appropriate, etc.)
Just finished replacing plugs and coils this past weekend. This was just scheduled maintenance due to the age/mileage on the coils, I wasn't getting any misfires yet (although I previously had to replace the #2 coil that failed prematurely). Cylinders #1 and #2 have oil in the spark plug tubes. It appears that oil has been 'weeping' out of #1's spark plug tube as well, but never enough to see any on the ground. All the rest were clean. All of the spark plugs are clean (the electrodes, but the upper porcelain has oil on #'s 1 and 2). No intermix or any other such problems, but uses about 1/2 quart between oil changes. Is the presence of oil in these tubes an indicator of any potentially big problems? Is there something I should do proactively, such as replace the tubes and o-rings to stop the oil from leaking into them?
Sorry about the picture quality. It's tough to get a pic down those tubes with mufflers mounted.
To the first part. Its a common issue and just a quirk of our motors if u have already done the plugs the tubes and rings r just one step further. Simple and cheap repair, fcpeuro has a 6 pack kit or u can get them individually.
oil in the tubes is not an indication that anything else is wrong but the o-rings on the tubes
Great, that's good to hear. I was a little concerned that since this problem only appeared on cylinders 1 & 2 (known to be a problem area), that it could possibly be something more.
@De Jeeper
I actually bought the FCP Euro kit for this job. It's a shame they don't include the spark plug tubes and seals, at least as an option. Now that I've been researching this, I see that there are other kits out there that do. I'll suggest this to FCP Euro.
Sorry, I was trying to type as few words as possible while laying on the couch resting, holding my lap top with one hand and typing with the other. An old *** dog trying a new trick.lol
If there were a bigger issue I would have "tried" to say so, it just needs tubes and o-rings.
My understanding is there are metal tubes w/O-rings that are an upgrade over the plastic tubes. I guess Porsche initially figured our engines would never last 100K miles, so lets stick a cheapo plastic tube so it can deteriorate with age, heat and oil. I don't know where to get the metal tubes, but I think Jake at FSI knows. Someone else might chime in as well.
Haha, thanks. I have a vested interest in this topic, as my car is doing the same, lol. I ordered a 6 pack of tubes with rings for like $35 from DP. Also got an 8pk of plugs from a different seller, for about the same money. Oddly the 8pk was cheaper then the 6pk of plugs 🤔🤷♂️
