Quote:
Originally Posted by 40 Deluxe
Does this mean that at operating temperature .000" oil clearance is acceptable?
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I am not understanding your Question, Mr. 40. I may be still not woke up!
But if you set a 2" crank clearance at .001, or .001-50, you will have a crank clearance at .000, as a Hot crank will be larger then that clearance. So what happens is, either the crank, or the babbitt in the insert has to give for size, and it won't be the crank!
Fortunately, after that, a hot crank will open up a bearing to what ever it needs for clearance, to survive.
So the whole idea of setting the correct clearance for any bearing, is to keep the bearing surface, as much as you can, from smearing, and wasting any measurable amount, of surface, for the most longevity.
One last thing, if say an engine in an Auto is pushed at high RPM's, much of the time, (not as bad in a pressure engine), but at high RPM's, the bearing clearance will be greater, then if it were driven at preferred normal speeds. This is more noticeable, in a splash engine.
Thanks,
Herm.