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986inquiry, I did not say that the IMS upgrades make IMS bearing failure impossible - only that "they should all but eliminate it as a cause for concern". When one considers the relatively low failure rate of the original bearings (and extremely low in the case of the original dual-row), I stand by that comment.
With respect to the larger bearings introduced by Porsche in the 2006-2008 model year, I did not understand that they were ceramic. In any event, while there are a number of reasons that one can get metal filings in the oil, there is nothing to suggest that failure of any of these parts occurs in the engines at anything beyond normal frequencies. All engines can fail and those with poor maintenance schedules are, of course, much more likely to suffer internal failures. My point was that there is no longer a need for paranoia on the part of owners of these engines.
Brad
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