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YOUR RESEARCHWhen did Porsche switch to the larger IMS the requires a case split to swap?
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Replace '99's engine
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My '99's engine was replaced by the dealer with a porsche remanufactured engine in mid 2005, and it has the larger, non-replaceable bearing (6305).
When did Porsche switch to the larger IMS the requires a case split to swap?
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Leading evidence: 'Replace '99's engine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace '99's engine' (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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When did Porsche switch to the larger IMS the requires a case split to swap?
Replace motor (cost $16k at the time)
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My (new to me) 01 was has a Porsche replaced motor (Cost $16K at the time) but does not have the AT.
When did Porsche switch to the larger IMS the requires a case split to swap?
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Forgive me if this has been covered, I'm having trouble nailing this down. Trying to find out when Porsche switched to the larger IMS bearing that requires a case split to replace. For some reason I thought this didn't occur until the 997 chassis. I'm asking because there's an '02 C2 for sale
here
, and the owner reports that when a shop went in to address the IMS/RMS they found it was equipped with this larger-style IMS requiring a case split, and that seems odd to me for a car that early.
OP - Please search this forum and 997 forum. There’s a range of serno’s for M96 AT engines and early M97 997 engines that are covered in those posts.
Also, if, as the seller claims, the documentation in his possession does go back to new, the engine change to an AT serial number will be shown. So the question for you is what is the engine number? If there’s no engine swap or IMS replacement documented, then this IMS is original.
I have a 1999 C4. Engine was replaced some years ago. The engine serial number stamped on the engine does NOT have 'AT' in it, and yet I do have the large non-servicable bearing. Found out the hard way. I had the Porsche daler cross reference teh engine number even, and discovered that the serial number matches for a 1999 C2 in my C4 car.
I have no further information on who did the work, but this is relevant to the OP, as he says the owner of the car has the large non-serviceable bearing:
Moral of the story is that yes, you can have the large non-serviceable bearing in an earlier car. And the AT serial numbers may not be the only engines that have it.
To come back to your initial question, Porsche never intended for the IMS bearing to be replaceable without tearing down the engine. So it wasn't a factor for them when they designed the larger M97 bearing.
My (new to me) 01 was has a Porsche replaced motor (Cost $16K at the time) but does not have the AT. I have no idea what bearing it has.
My 02 does have an AT replacement with the big bearing and it was recommended to pull the grease seal and drive like I stole it (I did)...
Is it possible to tell which bearing is in place by the bearing cover? I did search but haven't found anything yet. This seems faster�and I really should be working right now, haha.
Here's an image the owner sent me of the bearing cover from when his tech pulled the trans to address the IMS. Is there some giveaway here that a 6305 bearing lies underneath that cover?
