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What exactly is a "spun" bearing?
Posted: Tue May 25, 2004 6:38 am
by douglas vincent
Just so I know, thanks
Posted: Tue May 25, 2004 6:45 am
by vrg3
I believe it's just when a bearing rotates in place. Ordinarily, a shaft rotates inside a bearing, with an oil film between the shaft and the bearing. The oil comes in through a hole in the bearing. Once the bearing is spun, the interface no longer gets the lubrication it needs.
I've never torn down an engine or examined the bearings of a motor before, though, so someone correct me if I got it wrong.
Posted: Tue May 25, 2004 8:03 am
by mTk
That's correct vik. W/ the rod bearings the oil comes through the crank.
MK
Posted: Tue May 25, 2004 4:49 pm
by BAC5.2
Yea, the bearing will actually spin in it's location.
If you spin a rim inside a tire, that's what SHOULD be happening with the bearing. If the tire gets traction and spins slightly, that's what happens when you spin a bearing.
It usually leads to the engine seizing. Bearings should stay in place.
Posted: Tue May 25, 2004 7:31 pm
by magicmike
just to clarify...the oil comes in through a hole in the journal (main or pin) not the bearing, if we are talking about crankshaft bearings anyway.
-Mike