What causes valves to stick?

[SavageC20]

Originally Posted by cleszkie

I had an AMC 360 small block that spun the rear cam bearing just enough to impact oil flow to the entire engine. I'm not exactly sure how the oil flow is routed in a BBC, but this is something to consider. It would be easy for an engine builder to miss if they were not looking for it. Just a thought.

When they tore it down the second time they inspected all of the cam bearings and said that they looked fine. They went ahead and put a new set in to be safe.