This E-Mail was received by me from a friend with a 58 MERC 430 MARAUDER Engine;
"Thought I would write and share with you something I would have never thought about being a problem with putting a roller cam in a 430. I tore into my 430 (again) to replace the roller lifter locking bars with some that were slightly longer to give the lifters a bit more freedom of movement. That of course meant I needed to remove the pushrod cover (valley pan). When preparing the pushrod cover for a new gasket I happened to glance at the baffle for the crankcase vent where I found five very strange dings (two on one side of the baffle and three on the other). After thinking about it a bit I came to realize they were made by the locking bar retainers on the lifters.
With that revelation I realized why I had experienced so much unusualness in trying to get things right, which is a bit hard to do when both the exhaust and intake lifters on cylinders 4 and 8 had really been banging away at the baffle. The fifth ding was from the intake lifter on cylinder 7, and was probably not severe enough to really affect valve function as the others could have been doing. Solution: Fine tune the given areas on the baffle with a ball peen hammer. Whap, Whap, Whap!
Thought you might find it interesting and something you might sometime pass along to those participating in the MEL forum."
Thanx For The Tip Jim...
