Quote:
Originally Posted by lindy 911
If the engine still runs after a 200 mile trip, I suspect this is isolated to the upper end. If the spray bars were not working both cams and all the rockers would be trash. Rockers do break all by themselves. You might not be as bad off as you think. Just because the cover looks "dry" doesn't necessarily mean it is.
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A lack of lube between rubbing parts generates much heat and wear, especially in a high load area between rocker arms and cam lobes. Valve guides will also lack adequate lube and they too might exhibit excessive wear. After a few hundred or thousand revolutions, material will have worn from those surfaces and clearances may increase beyond spec. The shorn material is steel particles, bronze in the case of valve guide material. It does not conveniently remain in the valve train area.
After examining the other engine access areas, suggest cutting open the oil filter and see what's in there.
Drain the crankcase and oil tank and see what's sticking on the magnetic drain plugs.
Take your rebuilding/refurbishing cues from the results of those inspections.
Sherwood