3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHow bad is it? Engine problems 996
Leading reported evidence
Replace (30 minutes including a coffee)
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
Got a new one which was easily replaced(30 minutes including a coffee).
Leading evidence: 'Replace (30 minutes including a coffee)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair /machine shop is the reputed best place' (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
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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
According to previous owner the job was done by an authorized workshop and that two pistons and connecting rods was replaced together with all the bearings, seals and gaskets.
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
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Suggestion
I learned a nearby tractor repair/machine shop is the reputed best place to take any crankshaft and has quick turn around.
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Discussions that contain suggestions
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Suggestion · Original poster
Investigated and decided to replace the oil pressure sensor.
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Discussions that contain suggestions
1
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Discussions that performed work without a confirmed outcome
1
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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
According to previous owner the job was done by an authorized workshop and that two pistons and connecting rods was replaced together with all the bearings, seals and gaskets.
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.
3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 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: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello.
I'm the happy but concerned owner of a 1999 C4.
I bought it this Winter from the previous owner who had just finished the repair and overhaul of the Engine due to a seized con rod.
According to previous owner the job was done by an authorized workshop and that two pistons and connecting rods was replaced together with all the bearings, seals and gaskets. All done by the book. They also made an upgrade with an improved oil pump. Intermediate shaft bearing was also replaced.
When I was out driving the oil pressure was suddenly gone. Stopped the car. I let it cool down a bit and started. Pressure was low but OK. Got it back to the garage.
Investigated and decided to replace the oil pressure sensor. Got a new one which was easily replaced(30 minutes including a coffee).
Engine started and the oil pressure was OK but not more. Got worse once the Engine got warm.
Decided to go for my first oil change and this is where the not so funny part start.
I found the oil filter cartridge to be rather contaminated with metal particles.
Found none on the oil plug but this is a bit worrying.
Anyway. I made sure that all the oil was drained out and filled up with 5W50. Started. Waited a second or two and then read a clear 5 bar on the dash.
Still I could hear a knocking noise from the Engine. Switched off and filled up to max and started again. Could not hear any noise.
Now(sorry for the long story) I don't know how to proceed.
I'm guessing that if I do an oil change again in a week or two and if I then find even more glitter/metal in the oil that the Engine is in a desperate need of yet Another overhaul. Still I fear that during this week or two I will damage the Engine even more.
What is interesting is the fact that the Engine runs just fine and without any metallic knocking noise or similar.
What is your experiences? Is there any easy way to check? Can you access the moving parts in the Engine witout completely dismantle it?
What would you do?
Best regards
/Fredrik
Dear soon to be unhappy 996 owner, if the con rod seized on the crankshaft journal, it wears the crankshaft enough to cause excessive clearance between the crank & it's bearing insert. In order to restore proper oil pressure at operating temperature you need to replace that crankshaft & rebuild the engine. Before you start the engine again, remove the oil filter housing & filter, then stick your finger into the hole where the filter attaches. There is probably metallic particles there & in the filter.
I just rebuilt a Cayman 3.4 with #1 rod bearing spun. I replaced one rod and two pistons. I also replaced one main bearing pair, as it had received a bunch of the flaking from the rod journal. I plastigaged everything else and miked what I could. Had to have that rod journal "metalized" back to stock as they don't make undersize/oversize bearings for these animals. It took months for the crank to get back. I learned a nearby tractor repair/machine shop is the reputed best place to take any crankshaft and has quick turn around. Mine is running sweet at present. I have a few used rods and pistons left over at a decent price if you need them.
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