Would have been interesting to hear Jenkins` response to the contradiction. He was talking about Cylinder wall oiling/ rod side clearance, "oil trapping" and its effect on oil pump volume. Hard to believe the Grump didn`t grasp the concept of oil pressure being created by bearing clearance. just sayin...
Here is Jenkins` book:
https://www.scribd.com/doc/110755831...e-Bill-Jenkins
The paragraph the article referenced is on Pg.47
Mike