Hello everyone! I just start to clean 4age bigport head, and find out that 4th exhaust cam bearing looks different than others.. Is it too Bad, or can i still reassembly head with these caps? Camshaft looks good only bearing cap had that little groove,  just where camshaft had "lubricant hole" (or what IT is correct name ) so, do it carry oil all over that 4th bearing cap, and everything is okay, or is cap (and head) only a trash? Cams roll still smooth, when i turn them by hand. That groove on cap had smooth edges, not sharp. Other caps looks good yhen only had minimal Marks wich is normal. Engine runs good before disassembly head, only idle was quite high 

Edited September 15, 20197 yr by Demosta

I wouldn't worry, these are old engines and all the ones I've seen show some dirt scours like that.

I have had the exact same thing with my big port red top but my one was bought in bits did you get info on this cus I am worried if I should replace it and the cam cus on mine the cam is worn in the same spot aswell