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well, I think that any engine failure in a late model Porsche gets diagnosed as ims failure. perhaps especially at can tire. the 997.1 engines got their additional displacement by stroking the engine. with the longer stroke and the 'cost effective' cyl lining material used, folks are finding that the pistons are wobbling and scoring the cyls. take it to the extreme and you get a failure that could look like an ims failure.
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