11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHQuickest and best test for engine health " case in point"
Leading reported evidence
Run good
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
Remember that this car was recently bought with no noise, ran good with no symptoms except some occasional smoke on start -up...
Quickest and best test for engine health " case in point"
Read full discussion summary
Leading evidence: 'Run good' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run good' (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
It will determine how much "overfull" you can run the oil level for Track Work.....It doesn't really effect the M96/7 if you drive it like a Granny....
Quickest and best test for engine health " case in point"
Test "
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
I have been preaching the "blow-by test" for a while now as the quickest and best test for engine health on the M96 engine ( besides doing comprehensive oil pressure test and oil analysis)
Quickest and best test for engine health " case in point"
Test .html#
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.
Quickest and best test for engine health " case in point"
Test accomplish the same
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.
Quickest and best test for engine health " case in point"
Run oil level
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
It will determine how much "overfull" you can run the oil level for Track Work.....It doesn't really effect the M96/7 if you drive it like a Granny....
Quickest and best test for engine health " case in point"
Test "
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
I have been preaching the "blow-by test" for a while now as the quickest and best test for engine health on the M96 engine ( besides doing comprehensive oil pressure test and oil analysis)
Quickest and best test for engine health " case in point"
Test engine health
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
I have been preaching the "blow-by test" for a while now as the quickest and best test for engine health on the M96 engine ( besides doing comprehensive oil pressure test and oil analysis)
Quickest and best test for engine health " case in point"
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 · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have been preaching the "blow-by test" for a while now as the quickest and best test for engine health on the M96 engine ( besides doing comprehensive oil pressure test and oil analysis)
Above normal blow-by has several repercussions on the M96/7 engine, beside a slight loss in Torque, you can have an increase in oil consumption, smoking on start, and overloading the already weak OEM AOS...
Case in point :: Aaron bought this 2006 Cayman about a year ago as his track toy . He has track it a lot, it runs well with good power and good oil pressure and no engine noise,but has had some smoking on start-up ever since he got it. He has a Youtube Channel "HELP me DIY" with lots of DIY videos on Porsche and BMW, but he is not a professional, but is a very willing DIY'er...
About 9 months ago I convinced him to do the Blow-by test on the Cayman...( video of the blow-by test below) and got a blow-by value at WOT of
170 Liters per Minute
...This is way excessive for a healthy engine ....The engine is now disassembled for a rebuild and here are pictures that show the cause of high blow-by readings...
The engine is getting some big Nickies and big pistons during the full rebuild..
Here is the Original Thread on the blow-by test I developed for the M96/7 engines ...
https://rennlist.com/forums/996-foru...-by-test.html#
Cause of 170 LPM blow-by cyl#6
cause of 170 LPM blow-by cyl #6
Here is the video of the blow-by test ..
You Tube
Remember that this car was recently bought with no noise, ran good with no symptoms except some occasional smoke on start -up...
Wow! I loved the �glove� ! It�s amazing how something that seems like a fine idea at the time can go so wrong, so quickly! Super informative and well done video
Yeah, Aaron called me in a panic to tell me about the glove fiasco, I laughed my *** off and told him to just see if he can find it, latex would probably just get chewed up and spit out the exhaust pipe, I've seen much worse get sucked into engines...
Good lesson for him though...
Aaron is great. His videos helped me in my lead up to deciding to buy my 986 S and I enjoy watching them each time I'm doing something or other to my car.
Thanks man, I have to keep preaching the "blow-by test" on the M96/7, it is so important especially if Tracking the car . It will determine how much "overfull" you can run the oil level for Track Work.....It doesn't really effect the M96/7 if you drive it like a Granny....
Seconding that this is a very useful test on any engine, not just M96/97. We had a new Lang Racing S54 fail in just a few hours, it was pushing so much positive crankcase pressure the valve cover gasket blew.
This test is much better, faster, and easier than a leak down test...
The leak down test is static, the blow-by test is dynamic. Dynamic is always better than static unless the Dynamics make it too hard or move to fast or are too complicated.....The leak down test will certainly show if the rings are not seating when static at only about 100-150psi, but the blow-by test is conducted at 10x that pressure ( 1000-1500 psi) also there is a thing that can cause rings to "flutter" at high RPM and lose seal ( but modern very thin rings are less likely to flutter at high RPM unless the piston ring grooves are severely worn).
And the blow-by test is so easy to do, anybody can do it with very inexpensive equipment/tools..
This is a source reference. Confirm exact model applicability in the original material.
