you guys are nuts, if its knocking that means metal to metal… if you put one scratch in a bearing, thats the end of the bearings life… i have NEVER had such a problem with a properly primed engine, it is totally critical to get the oil everywhere before you run it, If you have oil pressure and nothing coming out of the pushrods, that is a problem, that means something is stoping the oil from getting up there… IE: bearing clearences, galley plug problems, cam bearing in wrong… stuff like that…