OK, help me learn here... cause and effect... are there 2 different scenarios that can/do happen? i.e.:
1) Oil pump goes bad, and inadequate oil flow to bearings causes bearing scorch/seizure/failure; and
2) Bearing(s) become worn/UNDERsized for some other reason, and the oil-feed holes to bearings become "wide open", and lack of back-pressure causes low oil pressure to the rest of the engine?
Thanks in advance, (gonna re-read those threads on how/where to mount REAL mechanical oil P gauge...)
your first situation was hte most common one , when the pump goes bad it no long feeds enough oil to the bearing , which causes them to "spin" , basically they wind up seizing and one spins over onto the other
the second one is less common , it is common in extremely high mileage engines , that have had no work done to them.
my case was number 1 , my oil pump went for some reason and i no longer had adequate oil to the bearings
my engine had 156k on it when this happaned , situation 2 usually happens above 300k miles , the only other time the camshaft is involved is if the gear connecting the cam to the pump breaks , as the pump is mechanically driven , and i believe it is by the camshaft