Glenn,
I just saw this post. I had to do some backtracking to figure out that this is a continuation of the "Sticking Valves" story.
You say it was #6...again, so this means it was a brand new rocker arm. This is very interesting, and bizarre!
Maybe someone will tell us if there is any chance for a intake valve to contact a piston top with a stock engine/cam setup.
Do all the valve springs appear to be stock, ie, single springs, not inner/outer hot rod stuff.
Does the truck run great right up until the rocker pops, or does it start to run differently, then drops the cylinder.
The only components in the equation are the cam, lifters, pushrods and rocker arms...seems pretty simple. If the cam starts to move the valve train and the valve refuses to move, something must let go! How could the valve refuse to move occasionally?
As my dear old cousin would say, "it'll develop". :confused:
Stuart
