direction of pully rotation is clockwise. I got the engine torn down completely now. I washed the block in my parts washer, without freeze plugs, but in looking down in the block I still see come crap that I did not get out. Going to wash again and back wash the radiator, drill extra cooling holes in head gasket. And see what happens. The engine is the original one in the truck, and it had some expanding freeze plugs installed sometime in the past, and in looking at the crap in the bottom of the block, I am wondering if someone had dumped a bunch of stop leak in it, and it is breaking loose with the new rebuild and fresh antifreeze.