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How to tell if replacement engine has revised IMS bearing?

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YOUR RESEARCHHow to tell if replacement engine has revised IMS bearing?

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Inspect ims itself manually

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Suggestion · Original poster
Secondly if it's not possible to determine from the SN alone, is there any alternative way to determine it rather than doing full procedure of removing the gearbox from the engine and inspecting the IMS itself manually?
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How to tell if replacement engine has revised IMS bearing?

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Leading evidence: 'Inspect ims itself manually' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Inspect ims itself manually' (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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Inspect ims itself manually

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Suggestion · Original poster
Secondly if it's not possible to determine from the SN alone, is there any alternative way to determine it rather than doing full procedure of removing the gearbox from the engine and inspecting the IMS itself manually?
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How to tell if replacement engine has revised IMS bearing?

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POST 1 / ORIGINAL POSTEROriginal post

Hi everyone, Currently I'm looking at a 2001 996 C2 with the following engine number: M9604AT66166494 Because of the AT symbol I can determine it's M96/04 engine from 2001 (661). However, the info I got from this thread in Rennlist indicates that since it's a replacement engine it doesn't mean it's assembled in 2001. The previous owned showed me a receipt stating the engine was changed in 2009 (could be 2010 or 2011 but I don't have the receipt with me atm) and was ordered straight from Porsche itself. In this case, can we determine from the engine serial no 66494 that this M96 has newer IMS bearing rather than the single row IMS bearing from 2001? Secondly if it's not possible to determine from the SN alone, is there any alternative way to determine it rather than doing full procedure of removing the gearbox from the engine and inspecting the IMS itself manually? Regards and greeting from Australia!

POST 2Original post

You can remove the crankshaft position sensor and snake a small scope down behind the flywheel and get a good look at the "tell all" 22mm vs 11mm IMSB attaching nut.. Can be done by someone with less than perfect surgical skills....

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