In article
,
harry wrote:
With shell bearings, there are two forms of "wear". Hard particle
lodge in the soft metal and the shaft wears.

Since oil filtration isn't perfect, this is what happens.

OR local overheating causes the shell to distort increasing the
clearances unacceptably

Not a problem on a normal engine.

--
*I started out with nothing... and I still have most of it.

Dave Plowman London SW
To e-mail, change noise into sound.