Low Oil pressure

Also too, anything at ALL that keeps the oil pump from seating all the way down on the main cap can cause a leak. If those surfaces are not perfectly flat and free of sharp edges and the like, you can have a problem. And if you happen to be using the ARP oil pump stud kit, that can sometimes cause issues with the same problem. The oil pump not seating properly. There has been more than one member here have that problem.