18 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHDual row or single row IMS?
Leading reported evidence
Replace ever fall, usually
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
It�s been changed ever fall, usually with less than 2,000 kms of driving over the summer.
Leading evidence: 'Replace ever fall, usually' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'dual row ims bearing' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Inspect imsb flange' (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 suspect a cause
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.
Suspected cause
There is no way to know for sure without examining the flange, but it is likely a dual row IMS bearing.
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
The only true way to know is to split the transmission from the engine and inspect the IMSB flange.
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.
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 intend on switching the IMS out when changing the clutch, but this one has very low Kms (55,000), so isn�t there quite yet.
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
Is there any way, by use of a flexible endoscope or similar, to look through an inspection window or whatever, and see the mounting of an in situ ISB and tell which version it is?
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.
18 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: 20261027T154520Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I�m considering getting back into a 911, and am looking at a nice local 2000 C2. It has a build date of 04/ 2000. Are the chances greater that this car has the dual row IMS or the single? I intend on switching the IMS out when changing the clutch, but this one has very low Kms (55,000), so isn�t there quite yet. Any help would be appreciated.
There is no way to know for sure without examining the flange, but it is likely a dual row IMS bearing. My 01 / 2000 build date has a double row bearing.
I know, but it�s had oil changes every fall before being put away for approx half the year during winter. Average of 3,000 kms between oil changes. I�d of course be getting a thorough PPI.
Is there any way, by use of a flexible endoscope or similar, to look through an inspection window or whatever, and see the mounting of an in situ ISB and tell which version it is?
It is a difficult thing to answer definitively. All 98, 99 and some 2000's came with the dual row IMSB. There was a fire at the plant (or a fire at the Porsche plant...I don't know which it was) that provided the dual row IMSB sometime in 2000, and Porsche switched over to the single row IMSB. I don't think anyone knows when in the engine production line they switched over to the single row in 2000. I would venture a guess that early 2000's have a dual row. but it is difficult to say. The only true way to know is to split the transmission from the engine and inspect the IMSB flange. With a picture of the IMSB flange, there are plenty of people on here that can identify dual vs single row installations.
I recall seeing an
engine
serial number posted in some thread (I think on RL, but not absolutely positive) that identifies when they made the switch to single row. I don't know if that engine number is an accurate way to determine, but it's listed somewhere. If I find the thread, I'll post it.
It is based upon the serial number of the engine rather than the car. I found the post, it was in the 997 forum. Again, I don't know if this is accurate, but it seems logical that there would be a hard line on the switch based upon engine production number.
Original post
:
https://rennlist.com/forums/997-foru...ml#post7944762
Cut & paste of post below
:
I seem to remember that Jake Raby's position is that they are all over the map. I guess the question is, at what odds that you have a double row are you comfortable leaving it in until the clutch change? It's only got 34,000 miles, so that clutch could last another 30,000 miles or longer. Personally, I'd use the IMS as a negotiating tool and change it to the Solution just for piece of mind. I like to drive my car and not have to think about the bearing.
It�s been changed ever fall, usually with less than 2,000 kms of driving over the summer. I�d plan to add a new LN bearing or the solution, but not right away.
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