9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHQuestion concerning IMS 99602406
Leading reported evidence
Replace dealer is saying the imsb
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 dealer is saying the IMSB was replaced, which is not possible without a complete engine tear down.
Leading evidence: 'Replace dealer is saying the imsb' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check engine number' (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
In some cases, dealers/shops replaced the flange as a fix for a �leaky ims bearing/flange� as we all know now, this was/is a fools errand as it has little to nothing to do with the bearing failing.
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.
Use by porsche in m96 and m97 engines manufactured in
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
However the oversized IMS bearing used by Porsche in M96 and M97 engines manufactured in and after the 2006 model year is larger than the IMS flange housing bore which prevents replacement of this bearing without complete disassembly of the engine.
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
'' With model year 2006 through 2008 Porsche 987 Boxster, Cayman, and 997 911 engines, the intermediate shaft was redesigned and used a larger 6305 bearing.
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
In some cases, dealers/shops replaced the flange as a fix for a �leaky ims bearing/flange� as we all know now, this was/is a fools errand as it has little to nothing to do with the bearing failing.
Use by porsche in m96 and m97 engines manufactured in
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 · Original poster
However the oversized IMS bearing used by Porsche in M96 and M97 engines manufactured in and after the 2006 model year is larger than the IMS flange housing bore which prevents replacement of this bearing without complete disassembly of the engine.
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
'' With model year 2006 through 2008 Porsche 987 Boxster, Cayman, and 997 911 engines, the intermediate shaft was redesigned and used a larger 6305 bearing.
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
I believe 2003 was one of those years where Porsche could have put anything in there, as they are famous for either launching next model year improvements in current years or using older inventory in later year cars.
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.
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: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I am looking at a 996 C4S 2003 that my Mercedes dealer has for sale. I don't have to much knowledge on the 996 but I know the possible issue with the IMS
They told me that the IMS was replaced. They have a picture showing the IMS and it has the part number 99602406 and Germany on the face.
Is this a Porsche part?
From what I read, this part is the non serviceable third design IMS bearing from model year 2006 through 2008. Is this correct?
If so, does this means that the engine was replaced? Is it possible to validate with the VIN if the engine was replaced?
Thanks for your help?
I can't really help with the IMS bearing, but check the engine number. If it was a factory replaced engine it will have "AT" in the engine number stamped on the block. A Google search on where the engine number is located will bring up plenty of pictures that you can send to the sales rep so he/she can provide the engine number to you. I believe 2003 was one of those years where Porsche could have put anything in there, as they are famous for either launching next model year improvements in current years or using older inventory in later year cars.
Thanks Joel. I will check with them.
Carfax shows an engine out repair in 2008
17 janv. 2008
The Auto Gallery
Woodland Hills, California, USA
Vehicule maintenance
• Antifreeze/coolant flushed/changed
• Cooling system bled
• Engine/powertrain computer/module checked
• Engine removed to complete repair
• Engine checked
From the photo that most definitely looks like the non-serviceable IMS bearing. Here's our recommendations for what you can and should do on an engine with the larger 6305 ims bearing:
https://lnengineering.com/products/t...s-bearing.html
Hmmm...something doesn't seem right. It is a 2003 996. It probably came with the larger non-servicable IMS bearing. The dealer is saying the IMSB was replaced, which is not possible without a complete engine tear down. Then, in 2008, the engine was removed to complete repair. Repair of what? Not the IMSB. So something is not right. You need to do some more checking and get a picture of the engine number. There is no way to check the VIN and specific engine number. Nobody keeps track of that.
I just read the documentation from lnengineering.com
'' With model year 2006 through 2008 Porsche 987 Boxster, Cayman, and 997 911 engines, the intermediate shaft was redesigned and used a larger 6305 bearing. However the oversized IMS bearing used by Porsche in M96 and M97 engines manufactured in and after the 2006 model year is larger than the IMS flange housing bore which prevents replacement of this bearing without complete disassembly of the engine. This also means that replacement engines manufactured and sold by Porsche for Boxster, Cayman, and 911 engines in or after the 2006 model year will have the larger non-serviceable IMS bearing.''
So it is not possible that this 2003 C4S has the non-serviceable IMS bearing new from factory. I will try to get the engine serial number to confirm that it is a replacement engine.
I have an 03' that had a similar situation, except the engine out repair was in 2009 at Porsche Beaverton. If you look for the engine serial number you may find that it starts with AT, which means it was a factory replacement. If you look around on the forums there is some information about engines after a certain serial number that have the larger non serviceable bearing, which is what it sounds like may be the case for that particular car. Can you let us know the engine serial number when you do find it?
That is simply a picture of the IMS bearing flange. On its own, it meaningless, except that it seems to indicate the larger bearing. In some cases, dealers/shops replaced the flange as a fix for a �leaky ims bearing/flange� as we all know now, this was/is a fools errand as it has little to nothing to do with the bearing failing. Do your diligence on this one!
This is a source reference. Confirm exact model applicability in the original material.
