are you sure you hooked it back up properly and filter is with arrow in correct flow position....look for a pinched line also....if all is ok pull off oil line at injection at engine and make sure its lower than or on the belly pan.....see if oil will drizzle out ....then rehook....you can also take a turkey baster and stick in end and suck it out till oil comes out....see if that works
Losen the hex nut on top of the oil pump wait til the oil flow from beneath the screw head and then retighten the nut.
Gravity should be sufficient, but if it isn't take a rag and a compressed air hose and put pressure in the oil tank, this will force the oil to go through the lines. Never run then engine when it's not getting oil.
