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Pelican Parts

How to determine if the IMS bearing was changed

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHow to determine if the IMS bearing was changed

Leading reported evidence

Use 22mm center bolt

Suggestion or failed attempt

No successful repair reported for this finding.

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Suggestion

The only sure way to know which bearing is in the car is to take it apart and look; the non serviceable IMS is the only design to use a 22MM center bolt.

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How to determine if the IMS bearing was changed
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Leading evidence: 'Use 22mm center bolt' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use 22mm center bolt' (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.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Use 22mm center bolt

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

The only sure way to know which bearing is in the car is to take it apart and look; the non serviceable IMS is the only design to use a 22MM center bolt.

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How to determine if the IMS bearing was changed
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.

5 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: 20261027T022239Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Greetings, I'm told somewhere in Pelican is a list of serial numbers that would tell me whether a 06, 997S has the Porsche upgraded IMS bearing. Can someone please direct me? BTW I am selling a pristine 993 C2. For details email me at [email removed] Thanks, James

POST 2Original post

Quotes source post: 8290491

There is no "list" but nor does there need to be. Any Porsche delivered after 2005, any factory reman engine delivered after 2005, and even some 2005 model cars carry the non serviceable oversized IMS bearing.

POST 3Original post

JFP: Good info. How about this question...I have one of those "...even some 2005 model cars...". Per the original build list still has the same engine at 51k miles. 2005 996 C4S. Any way to tell other than dropping the trans? Thanks Bill

POST 5Original post

Quotes source post: 8290874

As we do this for a living, I can assure you that you should not place any credence in published lists of build dates, VIN's, etc. We have found every one of them to be wrong more often than not. The only sure way to know which bearing is in the car is to take it apart and look; the non serviceable IMS is the only design to use a 22MM center bolt.

This is a source reference. Confirm exact model applicability in the original material.