[mercedestech]

I have a 3 bolt and its set in 0.123, here you go.[/QUOTE]

Thanks for the measurement! I want to compare the length of the pin on a stock cam vs. the lenghth of the pin on a single bolt comp cam to try and figure out if that is the problem. If his pin was set in .121" like your 3 bolt, I think the witness marks on the bolt and face of the gear would be more even like was said. The underside of that bolt shows the pin was protruding past the face of the cam gear preventing the bolt from properly tightening down against the face of the cam gear. This could be the whole reason this single bolt design is failing on comp cam equipped ls3's but no one has seen a factory cam gear spin on a factory cam even though it is the same design (yes I realize there is more stress on the design thanks to increased spring load, heavier push rods etc with the aftermarket set ups)