- Jan 19, 2010
- Mojave, Ca
Considering the cam turns at 50% speed of the crank and is primarily lubricated by oil thrown out of the rod journals, building the lobe/tappet oil wedge while "on the starter" is pretty much fantasy. I'm of the opinion that any rotation of the engine with flat tappets below running speed and full oil pressure is killing the the cam due to scuffing. The debate really is: does the cam die first from environmental rust or scuffing damage?