To remove the oil pan, first take out the oil pick-up tube-to-main bearing cap nut and then the oil pump pick-up tube mounting bolts, along with the two bolts that detach the oil pick-up tube. Next, remove the oil pump mounting bolts and lower the oil pump assembly; if the pump is faulty or suspected to be faulty, install a new one instead of attempting repairs. The oil pump hex driveshaft will come out with the pump, so examine the ends for wear and replace it if either end is worn, as a broken shaft can cause serious engine damage. For installation, prime the oil pump by pouring clean oil into the pick-up and turning the pump shaft by hand. If the pump is separated from the pick-up tube, use a new gasket and securely tighten the bolts. When reinstalling the pump, ensure the oil pump driveshaft fits all the way into the pump without forcing it; if it doesn't align with the bottom of the camshaft synchronizer, turn the pump slightly and try again, noting that the end with the stop-clip goes up into the engine block. Finally, install the mounting bolts/nut and tighten them to the specified torque.