I disassembled my head today getting ready for the engine botom end rebuild. I was planning to get the crack by the freeze plug welded; hence the teardown of the head.
I found the outer cam bore was damaged on the exhaust side. The upper 1/3-1/2 of the bore is damaged. The cam journal should be able to be polished or otherwise repaired. Has anyone had this type of repair done to thier head? I can't see myself simply junking the head due to this. There is a good amount of money in porting, coatings, etc done within the last year to it. I'll pay to have it repaired vs finding and porting a different casting if there is a repair that can be done.
I did have an oil pump/int shaft failure; though I caught the gauge just before it hit bottom. I know why there's damage.
On another note, why was the upper portion of the bore damaged? The bottom, front, and rear of the bore are in great shape. I would have expected those portions to be damaged due to the pressure from the valvetrain and timing belt, especially the bottom/front portion.