Remove the oil pan, then take out the two oil pump flange mounting bolts and the filter bracket nut from the main bearing cap bolt. Next, remove the oil pump and screen assembly. For installation, align the shaft so that the gear tang mates with the slot on the lower end of the oil pump driveshaft, ensuring the oil pump slides easily into place over the oil pump driveshaft lower bushing; if it doesn't, adjust the tang until it aligns properly. After that, install the pump mounting bolts and the filter bracket nut, tightening them to the specified torque, and finally, reinstall the oil pan.