Quote:
Originally Posted by ProTouring442
What do the pushrod guides and valve guides look like? If the rocker was allowed to turn even a slight bit, it could grind down the trunnion like that.
Shiny Side Up!
Bill
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Bill, I don't see anything abnormal on the guide plates. I think you may be right about the rocker rotating on the stud. I am going to re-install one of the "good" rockers on each stud and mark the valve stem with dykem and rotate the assembly, to see if I can tell if the rocker's roller tip is moving laterally across the valve stem as it moves through each cycle.
I might also see if I can put a dial indicator on the side of the rocker and see what it's doing, but that will probably be difficult since the sides of the rocker body are not flat...so the indicator won't be able to follow correctly...
If the rocker is rotating on the stud that would be bad, since it would likely mean a lifter bore is out of square...I hope not!