In my case the cam tries to come out the front of the block so hard it destroys the nylon and aluminum. The roller is the only thing that survives. You have to pack it with grease when installing as the roller can get damaged before oil gets to it.
Good to knowWhen the roller type comes apart, we found that the little roller is the perfect size to just go through the oil pump pickup screen. I have used both aluminum and nylon with no problems.
Not so good Why would this happen? Must be RPM? Different Distributor gear? I think I would be safe with the nylon or aluminum.In my case the cam tries to come out the front of the block so hard it destroys the nylon and aluminum. The roller is the only thing that survives. You have to pack it with grease when installing as the roller can get damaged before oil gets to it.