I have a vanguard model 35 that has cam noise not rocker noise. As I rotate the engine the cam makes a clanking sound.I cut a old oil pan so I can see the cam and whats going on in there. I left the pan to where the cam and crank would be held in place. as I rotate the crankshaft with my hand on the cam I feel and hear the clank and can figure out what it is . Valve lash is set correctly. I also took the rods and pistons out to eliminate them from the noise. I have a EC cam, EC valve springs and retainers any input would be appreciated.