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Originally Posted by Perfectlap
TP.
why do think Porsche was unable to preven RMS issues from seeping into the 987? After the 1000's of hours they devoted to this and still they could not keep it from infecting the "80% completely different 987 Boxster"?
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You have a big hole at the end of the crankcase, with a seal to keep the oil in. If the crank in the middle of the seal moves too much then the seal cannot do it's job and keep oil from seeping out. That is why the newest seal is the Cayenne style. That seal is like a wet noodle. The Cayenne stye sealing lip can move more than a harder material seal with a spring, unlike the prior generation seals.
Why this issue continues over to the 997/987 is the design of the M96 engine.
That is what I think.
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