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In trying to understand this issue a little better I've come across some info that the rest of you were probably already aware. For a given application the Porsche OE bearings are color coded for where they fall within the acceptable tolerance range. Blue for tight, Yellow for middle and Red for loose. There is some information to suggest that the aftermarket Glyco rod bearings are all on the tight end of the spectrum anticipating they would be used to rebuild a high mileage unit with some wear on the crank or been micro polished and prone to being on the low end of the spectrum. If this is true, if one were to have a crank on the large side of good and used tighter bearings with a coating....? I guess I need to open up this pack of Glycos I have and see where they spec out.
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