I got the left head off today. Looking at the head gaskets again, I found that while the fire rings were not burned, there were a few rough spots. I'm unsure if the detonation could have worn them rough or if they became rough, then the detonation began.
I have read the term.. Unshroud the valves before. Does this mean to clear material away from the valves to lessen restrictions?

Last edited by Frankenduster; 10/08/13 11:54 PM.