1. Remove the oil pan. Refer to Oil Pan Replacement .
2. Remove the oil pump bolt.
3. Remove and separate the oil pump, retainer, and driveshaft.
4. Discard the driveshaft retainer.



5. Remove the crankshaft oil deflector nuts.
6. Remove the crankshaft oil deflector.
7. Clean and inspect the oil pump. Refer to Oil Pump Cleaning and Inspection in Engine Mechanical - 8.1 L Unit Repair.

Important: When installing the oil pump, always replace the retainer between the oil pump and the shaft.

1. Install the crankshaft oil deflector.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the crankshaft oil deflector nuts.

Tighten
Tighten the crankshaft oil deflector nuts to 50 N·m (37 lb ft).





Important: During assembly, install NEW oil pump driveshaft retainer. Slightly heat the retainer above room temperature for ease of installation onto the oil pump driveshaft.

3. Assemble the oil pump, driveshaft and a NEW retainer.
4. Install the oil pump assembly. Position the oil pump onto the locating pins.
5. Install the oil pump bolt.

Tighten
Tighten the oil pump bolts to 75 N·m (56 lb ft).

6. Install the oil pan. Refer to Oil Pan Replacement .