Broke a cam dowel pin and chewed up a thrust plate. What would cause this? Solid roller, has a VERY generous amount of spring pressure. It's a 438" sbf. Its a single pin cam, 7/16 bolt. Used red loctite and torqued it to 65ft/lb. Has anyone ever seen the cam dowel pin back out of the receiver hole in the cam? This is the only thing I can see happening. The cam bolts was still super tight... Not sure exactly what's going on but I'm hopin it didn't ruin a brand new set of titanium valves! Here are some pics if the pin and thrust plate.