I chased the threads in the block and blew them out I also cleaned the threads on the bolts with a wire rush on a bench grinder. I used aviation sealer on the threads as I always have and a drop of oil under the head on the bolt before putting it in. Maybe the motor was built with a bad set of bolts. I've never had this problem before and I did everything the same. Could this be the start of the end of the world ?? hahhahahaha