11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHKnocking
Reported or suspected cause
resonance flap in the intake had a little play
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
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 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
Someone recently on a FB group had what they thought was bad bore scoring, turned out to be the resonance flap in the intake had a little play.
Leading evidence: 'resonance flap in the intake had a little play' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'resonance flap in the intake had a little play' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check on all cylinders both wet and dry' (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
A compression check on all cylinders both wet and dry
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
The engine is running normally, no loss of power or lagging.
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.
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 · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello,
I�ve got a 2001 cab tiptronic with 50k miles.
left work today and heard knocking after I got gas.
It�s happening at idle, but not when I rev the engine.
I know worst case scenario is bore scoring, I�m hoping it�s something else. This has been my daily for the past two years; should I stop driving immediately and what tests should I be asking the mechanic to run?
thanks
Update:
Mechanic stated it not bore scoring and sounds like something is loose internally and has to drop engine and disassemble to diagnose. The minimum quoted is 5k to take apart and reassemble. Anything else I should be doing while the engine is accessible?
Did you take it to a Porsche specialist? did he actually say "something is loose internally"
5k minimum doesn't sound like a very reasonable way to say it could be a full engine rebuild,
that sounds like its a mechanic who is going to take all your money.. also how would he know its not bore scoring if he didn't inspect it with a borescope,
maybe i'm overreacting as i don't know your mechanic.. buyer beware...
Just stating that i have heard that Slakker Engineering in Oklahoma is now doing Hartech Rebuilds, if i was fully committed to engine out i would be towing my car to those guys and getting a perfomance built engine...
Another idea would be to ask your mechanic to do a bit more investigation before committing to an engine out, Three things:-
1. A compression check on all cylinders both wet and dry
2. Carefully remove the oil filter and be there when he cuts it open to see if you have any metal in the filter.
3. Drop the oil pan to do a proper bore scope for bore scoring..
All that can be done with the engine in the car... at a much lower cost...
Opening the engine is a can of worms that could lead to a complete rebuild/refresh, costing $15-$30k. Be prepared for lots of potential little things that could lead down that path, including oval bores, worn bearings, head work, chain and tensioner pads, RMS, AOS, clutch, etc. I would only do a rebuild at the best shops that are known for rebuilding these M96 engines.
It�s not that you have to do all these things, but once the engine is apart, it might not make sense to put it all back together damaged for $5k.
�Something is loose internally�? Did he give you any further ideas? If not, I�d definitely get another opinion before dropping and tearing into the motor, especially if he didn�t do the basic starting steps mentioned by Gary12000 above. No way are you going to get out of dropping and opening the engine for $5k.
And - do you know if the sound disappears off idle? If it goes away with revs it�s definitely not just something loose.
Not saying it isn�t something worrisome, but it�d be a shame to tear the engine down for a single weak lifter that pumps up off idle. Someone recently on a FB group had what they thought was bad bore scoring, turned out to be the resonance flap in the intake had a little play.
This is a source reference. Confirm exact model applicability in the original material.
