Oil Pump: Service and Repair

PUMP-ENGINE OIL

REMOVAL





1. Remove the oil pan and pick-up tube.
2. Remove the timing chain cover.
3. Remove the four bolts, and the oil pump.

CLEANING
1. Wash all parts in a suitable solvent.

INSPECTION





CAUTION: Oil pump pressure relief valve and spring should not be removed from the oil pump. If these components are disassembled and or removed from the pump the entire oil pump assembly must be replaced.

1. Remove the pump cover.
2. Clean all parts thoroughly. Mating surface of the oil pump housing should be smooth. If the pump cover is scratched or grooved the oil pump assembly should be replaced.
3. Slide outer rotor into the body of the oil pump. Press the outer rotor to one side of the oil pump body and measure clearance between the outer rotor (2) and the body. If the measurement is 0.235 mm (0.009 inch) or more the oil pump assembly must be replaced.





4. Install the inner rotor in the into the oil pump body. Measure the clearance between the inner (3) and outer rotors (1). If the clearance between the rotors is 0.150 mm (0.006 inch) or more the oil pump assembly must be replaced.





5. Place a straight edge (1) across the body of the oil pump (between the bolt holes), if a feeler gauge (2) of 0.095 mm (0.0038 inch) or greater can be inserted between the straightedge and the rotors, the pump must be replaced.
6. Reinstall the pump cover. Torque fasteners to 15 Nm (132 inch lbs.).

NOTE: The 5.7 Oil pump is released as an assembly. There are no DaimlerChrysler part numbers for Sub-Assembly components. In the event the oil pump is not functioning or out of specification it must be replaced as an assembly.

INSTALLATION





1. Position the oil pump onto the crankshaft and install the 4 oil pump retaining bolts.
2. Tighten the oil pump retaining bolts to 28 Nm (250 inch lbs.).
3. Install the timing chain cover.
4. Install the pick-up tube and oil pan.