I'm swapping out my cams & found this. Is there any thing I can do? Are these cams any good now? The lobes are fine, but the bearings & the part of the cam they touch are scored. Any ideas what would cause this?

 

Looks like you got some crud in the oil galley...Get some compressed air and blow the hole out. Get ready for an oil bath...no real issues. But I would clean everything and change your oil.

 

Those are scratches in the cam bearings, not crud. Or are you saying crud caused the scoring & is not gonna hurt anything?

 

why is that head so dirty inside, what oils are you using ??

 

it clearly hurt something....

 

This is a motor I just swapped for so I don't know what oil was used, but it doesn't look any diffrent than mine did or any of the others I've seen.

 

ANy ideas if the bearing surfaces can be repaird or reused? I have good cams to go back in with.

 

Are the cams you pulled out stock? It looks like no one put any assembly lube when they installed them and they pulled a burr.

 

No they are Cosi M2s. Is there any way to clean up the bearings & install my good cams without causing an issue?

 

It may be that whatever tried to eat the cams was introduced by the oil supply. So, I'm not so concerned about the cam journals as I am about what else has happened in this engine. Also, what would be the source of material hard enough to score cams?

 

I didn't think about that. Maybe I need to pull the pan & check for other bearing wear.

 

bump for some more info.

 

bump

 

How do the cam caps look? I would say look for a new head. You may run into a low oil pressure problem. With the scoring on the cam journals oil will just shoot passed and starve something else in the engine. My opinion junk it and do a complete rebuild.

 

Crud big and tough enough to score like that would not be able to fit between the barrier where oil comes in. Probably caused by unsanitary technique when the cams were installed, or maybe the bearing caps were installed out of order or backwards. Each bearing cap is individually machined to it's position on the head, they are not interchangable. Place one on incorrectly and you can see the corner digging into the surface of cam