9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSurvey of 996/997 Owners
Leading reported evidence
Replace every 3k miles or so
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
ALWAYS Mobil 1, 0W40, changed every 3K miles or so.
Leading evidence: 'Replace every 3k miles or so' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace (3 weeks' (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
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
3) Castrol 0w-40 changed every 5k or before track day then after.
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
No failure, but IMS replaced with LN by previous owner.
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.
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: had a magnetic drain plug, no metal shavings detected in the prior oil change (3 weeks before the failure).
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
Two simple ways to reduce or eliminate both issues: Proactively replace the IMS, run better quality (read high ZDDP and film strength) oils, change them frequently (less than 5K miles).
Run better quality (read high zddp and film strength) oils
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
Two simple ways to reduce or eliminate both issues: Proactively replace the IMS, run better quality (read high ZDDP and film strength) oils, change them frequently (less than 5K miles).
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.
9 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: 20261027T042512Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'd like to conduct a survey of 1996-2008 Porsche owners in order to get an idea of what kinds of preventative maintenance have the most value/effect. Whether your car is healthy or if you've experienced an IMS failure or bore/cylinder scoring issue, please share. I will post this survey in a number of forums and compile the information in order to get some conclusive data on what works instead of just relying on circumstantial evidence:
1) The year, mileage, and model of your Porsche the last time you drove it (i.e., at the time of failure, if it experienced one)
2) Did your car experience either an IMS or cylinder-scoring-related engine failure?
2a) Did the failure occur on a racetrack?
2b) What was the nature of the failure?
3) What oil is/was used in the car?
4) Did/does the car have a LN engineering spin-on oil filter, or the stock oil filter?
4a) If the filter was a spin-on, did/does the car also have the extra magnetic strip installed?
5) Did/does the car have a magnetic oil drain plug?
6) Did/does the car have a 3rd radiator installed?
7) Did/does the car have a low-temp thermometer installed?
Two simple ways to reduce or eliminate both issues: Proactively replace the IMS, run better quality (read high ZDDP and film strength) oils, change them frequently (less than 5K miles).
If you want to improve the car's odds, use a spin on filter, with a FilterMag and magnetic drain plug, run a 160F stat.
1) The year, mileage, and model : 2002; 175,000; 996 Targa
2) Did your car experience either an IMS or cylinder-scoring-related engine failure? NO; UNKNOWN IF SCORING. TICKING SOUND VARIABLY HEARD; WAS TOLD BY 2 PORSCHE INDIES THAT IT WAS LIFTER. SEEMED TO COME AND GO.
2a) Did the failure occur on a racetrack? N/A
2b) What was the nature of the failure? N/A
3) What oil is/was used in the car? ALWAYS Mobil 1, 0W40, changed every 3K miles or so.
4) Did/does the car have a LN engineering spin-on oil filter, or the stock oil filter? STOCK FILTER
4a) If the filter was a spin-on, did/does the car also have the extra magnetic strip installed? N/A - STOCK FILTER; NO MAGNETIC STRIP
5) Did/does the car have a magnetic oil drain plug? YES
6) Did/does the car have a 3rd radiator installed? YES - FROM FACTORY
7) Did/does the car have a low-temp thermometer installed? UNKNOWN - IF THIS WAS A FACTORY OPTION, I DON'T KNOW. IF THIS WAS SOMETHING INSTALLED AFTERMARKET, THEN NO.
1) 2000 C2 Coupe, manual, 150,000, daily driver (Hard canyon driving once a month or so, 3-mile commute to work every day.)
2) No
2a) N/A
2b) N/a
3) Mobil 1 0w40, Pentosin or Motul, 5w40 usually (5000-6500 miles, whatever I feel like, and have time for...)
4) Stock
4a) N/A
5) Yes, last oil change (just for the heck of it)
6) No
7) Probably not, (temp hangs around vertical, will creep up a few degrees if I really push it on a hot day or in CA San Gabriel Mountain twisties/hard driving).
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1. 1999 996 manual. 32000 miles. Driven 12000 miles in the last year.
2. No failure, but IMS replaced with LN by previous owner.
2A. N/A
2B. N/A
3. Mobile 1
4. Stock filter
4A. N/A
5. No
6. No
7. No
1) The year, mileage, and model of your Porsche the last time you drove it (i.e., at the time of failure, if it experienced one).
(1) 997S, 2006, 100,000 Second water pump died.
2) Did your car experience either an IMS or cylinder-scoring-related engine failure?
(2) Nope. Knock on wood.
2a) Did the failure occur on a racetrack?
(2a) Never does racetracks
2b) What was the nature of the failure?
(2b) The usual loss of engine coolant.
3) What oil is/was used in the car?
(3) Mobil 1 0W-40
4) Did/does the car have a LN engineering spin-on oil filter, or the stock oil filter?
(4) Stock
4a) If the filter was a spin-on, did/does the car also have the extra magnetic strip installed?
5) Did/does the car have a magnetic oil drain plug?
(5) I made my own and use it every other oil change.
6) Did/does the car have a 3rd radiator installed?
(6) No. Not required where I live.
7) Did/does the car have a low-temp thermometer installed?
(7) No. Stock from Zuff.
Dan
1) The year, mileage, and model of your Porsche the last time you drove it (i.e., at the time of failure, if it experienced one)
A: 2002 996 C4 Cabrio. 65000 miles, last driven early June 2017
2) Did your car experience either an IMS or cylinder-scoring-related engine failure?
A: Did all preventive work; IMS, RMS, AOS, Water Pump, Plugs and Coils in 2016
2a) Did the failure occur on a racetrack?
A: Cylinder wall cracked on a 25 mile trip. As I was exiting the freeway, car miss-fired and got it towed to the mechanic, he found the crack on the cylinder head.
2b) What was the nature of the failure?
A: Cracked cylinder head (#3)
3) What oil is/was used in the car?
A: Very regular oil changes, always used Mobile 1
4) Did/does the car have a LN engineering spin-on oil filter, or the stock oil filter?
A: Stock oil filter
4a) If the filter was a spin-on, did/does the car also have the extra magnetic strip installed?
A: N/A
5) Did/does the car have a magnetic oil drain plug?
A: had a magnetic drain plug, no metal shavings detected in the prior oil change (3 weeks before the failure).
6) Did/does the car have a 3rd radiator installed?
A: All stock
7) Did/does the car have a low-temp thermometer installed?
A: All stock
1) 2009, 61k miles, C2S Cabrio, no failures to date.
2) No Engine failures to date.
2a) Tracked once a year at club meet.
3) Castrol 0w-40 changed every 5k or before track day then after.
4) Stock oil filter
5) Magnetic oil drain plug.
6) all stock
7) all stock
This is a source reference. Confirm exact model applicability in the original material.
