Quote:
Originally Posted by soling222
So the obvious question is: Why did the Porsche engineers design the IMS bearing used in the water cooled engines until 2009. Apparently, they could no longer use plain bearings that were pressure fed at both ends of the IMS in the newer water cooled engines, in contrast to the old aircooled engines. .
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I believe it is because the IM shaft is too long for just 2 plain bearings. It would need at least one more, if not 2, plain bearings along the length.
Quote:
Originally Posted by soling222
Why then, did the engineers continue to have the IMS bearing installed with both seals? The most likely answer is that they thought the bearing received enough lubrication particularly since the bearing was submerged 25% in oil with the engine off.
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That would assume the car is level.