When loosening and tightening, therefore, one detaches the first the accessory Serpentine Belt, and second the crankshaft pulley to arrive at the oil pump. Then, unscrew the four bolts that hold the oil pump housing to the front cover, and then withdraw the oil pump housing, and its O-ring. Afterwards, it is necessary to take out the oil pump drive gear on the face of the crankshaft. For installation, locate and insert the oil pump drive gear into the oil pump while seeing to it the words OUT or DAMPER are have their sides directed away from the engine. After that fasten the oil pump on the front cover and turn the bolts to the needed torque, also, it is necessary to install a new O-ring. I install again the crankshaft pulley and the accessory Serpentine Belt. For 6.0L and 6.4L engines, the crankshaft front oil seal and the five oil pump cover bolts are removed while the cover is lifted with the configuration of the bolts noted. Develop the front external surfaces of the gears and orient them to be replaced again. Take out the gerotors and look for signs of wear or damage on any of the components then replace the defective parts. The correct sides of gerotors should be facing forward as they are packed with lithium grease. Put a new O-ring in the oil pump cover, fit it in place and torque the bolts. The remaining installation steps are in fact done in reverse order to the removal steps.