Cadillac 19210599 Pump Asm,Oil (W/ Screen)

Remove the oil pump.

Remove the oil pan. While supporting the oil pump, remove the pump-to-rear main bearing cap bolt. This is the single bolt holding the oil pump to the rear main cap. After removing the bolt, remove the oil pump. Lower the pump and remove it along with the pump driveshaft. Note that on most models a hard nylon sleeve is used to align the oil pump driveshaft and the oil pump shaft. Ensure this sleeve is in place on the oil pump driveshaft. If it is not there, check the oil pan for the pieces of the sleeve, clean them out of the pan, then get a new sleeve for the oil pump driveshaft. Check the screen and the pickup tube for any damage or looseness. It must fit very tight onto the oil pump. If a new oil pump is installed, make sure the pump driveshaft is mated with the shaft inside the pump. Position the pump on the engine and make sure the slot in the upper end of the driveshaft is aligned with the tang on the lower end of the distributor shaft. The distributor drives the oil pump, so it is absolutely essential that the components mate properly. Install the mounting bolt and tighten it to the specified torque. Finally, install the oil pan.