Interesting discovery inside 318

prorac1 said
View attachment 1715123988

All of the cam bearings look beautiful except the 2nd one from the rear. What is that next to the parting line?

Make it smooth and leave it. The cam bearings have RELATIVELY low load. If the cam turns don't sweat it.

If you were going to run springs with 300 pounds on the seat and 800 over the nose I'd worry about it. For what you are doing, ignore it.