Pump-Engine Oil: Inspection

WARNING: This page is about a different variant/trim than selected.

Fig 1: Measuring Clearance Between Outer Rotor And Body

Courtesy of DAIMLERCHRYSLER CORP.

1 - FEELER GAUGE

2 - OUTER ROTOR

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.

Remove the pump cover.
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.

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. See Fig 1. If the measurement is 0.235mm (0.009 in.) or more the oil pump assembly must be replaced.

Fig 2: Measuring Clearance Between Rotors

Courtesy of DAIMLERCHRYSLER CORP.

1 - OUTER ROTOR

2 - FEELER GAUGE

3 - INNER ROTOR

Install the inner rotor in the into the oil pump body. Measure the clearance between the inner (3) and outer rotors (1). See Fig 2. If the clearance between the rotors is.150 mm (0.006 in.) or more the oil pump assembly must be replaced.

Fig 3: Measuring Clearance Over Rotors
Courtesy of DAIMLERCHRYSLER CORP.

1 - STRAIGHT EDGE

2 - FEELER GAUGE
Place a straight edge (1) across the body of the oil pump (between the bolt holes), if a feeler gauge (2) of.095 mm (0.0038 in.) or greater can be inserted between the straightedge and the rotors, the pump must be replaced. See Fig 3.
Reinstall the pump cover. Torque fasteners to 15 N.m (132 in. 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.