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A puddle by my piston (with photos)

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHA puddle by my piston (with photos)

Reported or suspected cause

injector and assume it is defective

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause: 1
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 suspect 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.

Suspected cause · Original poster
I am curious if most of you would swap out the suspect injector and assume it is defective.
Original post Read captured discussion
A puddle by my piston (with photos)

Frequently discussed work

Check on bore health (i highly

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
After I removed each plug I decided to take a peak into each cylinder with my Teslong TD450S to check on bore health (I highly recommend this tool).
Original post Read captured discussion
A puddle by my piston (with photos)

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Leading evidence: 'injector and assume it is defective' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'injector and assume it is defective' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check on bore health (i highly' (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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1 matching discussions · 5 captured posts examined · 0 partial discussions

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Check on bore health (i highly

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
After I removed each plug I decided to take a peak into each cylinder with my Teslong TD450S to check on bore health (I highly recommend this tool).
Original post Read captured discussion
A puddle by my piston (with photos)

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.

Check on bore health (i highly

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
After I removed each plug I decided to take a peak into each cylinder with my Teslong TD450S to check on bore health (I highly recommend this tool).
Original post Read captured discussion
A puddle by my piston (with photos)

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.

injector and assume it is defective

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect 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.

Suspected cause · Original poster
I am curious if most of you would swap out the suspect injector and assume it is defective.
Original post Read captured discussion
A puddle by my piston (with photos)

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.

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: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

2002 C2 911 Cab 3.6L 81k miles. While I was installing the UAOS in May I swapped in new Bosch injectors purchased from LN. Fast forward to a few weeks ago. A really humid day after a rain I got some misfires. I ordered some ignition coils and plugs from LN and installed them this weekend. After I removed each plug I decided to take a peak into each cylinder with my Teslong TD450S to check on bore health (I highly recommend this tool). Cylinder 6 gave me a little surprise. Some fluid was pooling by the piston and the cylinder wall. I pulled a tiny sample out with my bore scope and believe it was gasoline by odor and the cleanliness of the piston. Perhaps the new Bosch injector is leaking? Would a genuine Porsche branded injector be more reliable? I am totally not looking forward to going back in there to swap out this injector. But I will do it to stave off engine issues. I am curious if most of you would swap out the suspect injector and assume it is defective. RKAT: Bank 1 .14% Bank 2 .66% FRA: Bank 1 1.07 Bank 2 1.6 FRAO: .99 Bank 1

POST 2Original post

This is almost certainly oil in my opinion. You have at least some bore scoring on #6, which you can see the top of in the last image you posted. Likely it's much worse further down and oil is seeping past the rings with the engine off.

POST 3Original post

Contact LN about the injector. They're pretty good about standing behind the stuff they sell.

POST 4 / ORIGINAL POSTEROriginal post

I will take another peak with the piston fully retracted.

POST 5Original post

FYI Looking with the piston fully retracted is a good start and will show extreme bore scoring, but it actually starts at the bottom of the bore, which is covered by the piston even when fully down. To bore scope properly you really need to look at the cylinder wall with the piston all the way UP by looking through the crankcase.

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