Well having taken the head off of, here are the pics, no sign of detonation, or any melted pistons!! suprised there isnt any pitting or score marks on the pistons, they look as new...
This is a pic of my engine taken 2 yrs ago
As is is today..some 20k miles after..
the weak cylinder 3, nothing at all, could there be anything on the walls of the pistons? the crowns are spotless..