Ok, here is a weird one. I've done a complete engine rebuild. Motor cranks and idles good. Only one issue, after 5 attempts, I still have no oil pressure. I replaced the entire oil pump, and made sure the gears were rotating. I made sure all passages were clear. Took the front cover off and made sure the oil passage hole was clear. dropped the pan and made sure their was no blockage there. Am I missing something? No, it's not my oil pressure gage. There is no oil being drawn from the pan at all. the only oil in the filter is what I put in it.. There was no oil in the front cover. Should I wait longer for the pump to build pressure. I read where if I prime the pump with petrolium jelly that it would help.. Anyone have similar experiences like this?