Quote:
Originally Posted by atopa2002
Quote:
Originally Posted by Duk996
People are overthinking this thing. It's a plain bearing, the simplest, most common, most reliable bearing design. Millions of cars go to the junk yard with everything destroyed EXCEPT their engine bearings.
Either the bearing surface is too small for the load or the film strength is failing. All indications are the film strength fails due to too tight a clearance. BMW F'ed up. BE did a good job and actually went too in depth on the whole thing.
Edit: I should say the oil film is failing either way, either due to surface area not being enough, or oil film thickness.
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Is there any advantage for BMW to go with a tighter clearance ? |
Yeah, but it's in the fringes. Tighter clearances reduces oil flow needed, so I guess you save on the size and power consumption of the oil pump...fringes. It's more expensive to work with these crazy tolerances too! I don't really get wtf they were thinking.