[tharbert]

^^^what he said^^^ I was trying to reason through how a rocker could break other than valve contact with the piston. There is the fatigue factor. I guess it could break if the rocker seized on the shaft due to lack of oil or maybe a combination of fatigue and resistance on the shaft. I would think, at that point, the lobe and rocker face would have significant damage.

As Mr. Fairman points out, those little holes in the cam spray bar are a favorite place for debris to lodge. Not sure one or a few being blocked would cause the whole system to run higher pressure. The manual says to remove that spray bar and flush when rebuilding. When I tore mine down, I found a little bit of sealant in one hole so I can understand the requirement to R&R the bars.

Good luck! Wait to see some pics here