8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWhat IMS bearing is used in factory remanufactured 3.4L M96 engines
Leading reported evidence
Clean block
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
The tech cleaned the block, and replacing the IMS and the IMSB and a couple of chain guide rails (the plastic had been busted up some from the chain play) and that is all.
What IMS bearing is used in factory remanufactured 3.4L M96 engines
Read full discussion summary
Leading evidence: 'Clean block' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check bores and pistons' (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
(Not an engine, but my 996 Turbo's 6-speed was replaced with a factory sourced new 6-speed for just a selector shaft leak.
What IMS bearing is used in factory remanufactured 3.4L M96 engines
Use rebuilt parts
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
The fine print as I remember states that Porsche can use a mix of new, used, rebuilt parts to repair the car under warranty, all at its discretion.
What IMS bearing is used in factory remanufactured 3.4L M96 engines
Check bores and pistons
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
He never even bothered to measure the bearing clearances, check the bores and pistons for wear, etc.
What IMS bearing is used in factory remanufactured 3.4L M96 engines
Repair car
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
The fine print as I remember states that Porsche can use a mix of new, used, rebuilt parts to repair the car under warranty, all at its discretion.
What IMS bearing is used in factory remanufactured 3.4L M96 engines
Clean block
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
The tech cleaned the block, and replacing the IMS and the IMSB and a couple of chain guide rails (the plastic had been busted up some from the chain play) and that is all.
What IMS bearing is used in factory remanufactured 3.4L M96 engines
Replace imsb
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
As I recall the recommendation is to if one is going to replace the IMSB to first expose the bearing and verify which one it is then order the correct replacement bearing.
What IMS bearing is used in factory remanufactured 3.4L M96 engines
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.
8 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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Don't think anyone can really answer that without having a look.
Whatever bearing type is handy when the engine is reassembled is my WAG.
And the IMSB might not even be replaced during the remanufacturing. Some engines are removed and sent to the factory on rather the smallest of pretenses.
(Not an engine, but my 996 Turbo's 6-speed was replaced with a factory sourced new 6-speed for just a selector shaft leak. The techs assured me had the tranny not been covered by the CPO warranty they could have "rebuilt" the thing and cured that leak. But the factory paid for the removal of the old tranny and the the installation of the new tranny.)
Could be just a noisy lifer or something less serious than something deeper in the engine. If the engine internals are free of any debris from the trouble the iMSB and other internal engine hardware could be left undisturbed, so whatever the engine came with from the engine factory remains in service when it comes of the the remanufacturing department.
No. Just going by what I've been told by techs who of course believe they know.
As I understand it even "new" engines are not all they seem to be. That is as we have gathered from this IMSB business just because a car is say a 2001 doesn't mean it has the same IMSB as all other 2001 MY cars. As I recall the recommendation is to if one is going to replace the IMSB to first expose the bearing and verify which one it is then order the correct replacement bearing.
Anyhow, I can believe them. (And what they tell me agrees with my experiences in other similar situations.)
While everyone wants to believe the remanufactured engine is totally gone through and everything refreshed/replaced that is probably not likely as Porsche is as concerned about costs as any company.
(At a dealer, this a few years back, I came upon a 996 engine apart to be repaired. It has suffered a failed IMSB. The tech cleaned the block, and replacing the IMS and the IMSB and a couple of chain guide rails (the plastic had been busted up some from the chain play) and that is all. He never even bothered to measure the bearing clearances, check the bores and pistons for wear, etc. He told me -- I asked -- that he was operating under guidelines from the factory, which were probably put together by the factory techs who had gone through this, developed this, by doing the same thing with returned engines.)
And IIRC it agrees with the fine print in the car's warranty booklet.
The fine print as I remember states that Porsche can use a mix of new, used, rebuilt parts to repair the car under warranty, all at its discretion.
Please don't use the "as I remember and I heard it from so and so" excuse. Unless you have proof and a solid one at that, please stop posting things as this is how myths turn into "facts".
I can easily see a tech telling you whatever you want to hear or whatever it takes to get you to leave him alone when he is busy working on something. Last thing they need is an annoying "nosy" customer hitting them with 20 questions every time his car in for a service.
You mile long replies that have "every possibly under the sun" is anything but useful to those that actually do their own wrenching. Listing everything in the hope that something will "stick" is not what I would call a helpful suggestion to someone that is looking for help fixing their car. I told you this before but you keep going back writing your 500 word essay replies anyways. Post one or two solid possibilities of what the fix would be and leave the other 900 out of it.
Till further notice there are no heads! Porsche AG is remanufacturing M96 shortblocks with the only IMS they have, the last design with the largest diameter IMSB.
