right., the clean bore and piston is the one with the water problem,the others were running ok,also there seems to be a crack inbetween the two cylinders on the second photo ,looking at the way the valves are sunk more into the head on the center pots and it looks like the head is on its last skim on the outer two pots,it seems that this head has been very hot and badly warped then skimmed flat,this can cause your inlet cam to snap as it doesent run true in the head.......has it been crack tested? did you have it skimmed? .......i would seriously consider putting another head on it