i just pulled the motor out of this truck...i put all new gaskets and oil pressure sending unit, oil pump...when i put the main cap on i used a plasti gage and is at 1.2 at 80 pounds... Im looseing oil pressure after the motor gets warm i havent test the oil pressure with a gage yet. but i think the gage is ok...does it need to be primed... is there a valve some where in the 2.8 and so where is it at...