Dodge Dakota Sport 2001 Service Manual page 1143

9 - 114 ENGINE 3.9L
OIL PUMP (Continued)
Fig. 66 Oil Pressure Relief Valve
1 - OIL PUMP ASSEMBLY
2 - COTTER PIN
3 - RELIEF VALVE
4 - RETAINER CAP
5 - SPRING
Fig. 67 Oil Pump
1 - INNER ROTOR AND SHAFT
2 - BODY
3 - DISTRIBUTOR DRIVESHAFT (REFERENCE)
4 - COTTER PIN
5 - RETAINER CAP
6 - SPRING
7 - RELIEF VALVE
8 - LARGE CHAMFERED EDGE
9 - BOLT
10 - COVER
11 - OUTER ROTOR
CLEANING
Use only mild solvents to clean the oil pump. Do
not use any abrasive material to clean the oil pump
housing or rotors.
INSPECTION
Mating surface of the oil pump cover should be
smooth. Replace pump assembly if cover is scratched
or grooved.
Lay a straightedge across the pump cover surface
(Fig. 68) . If a 0.038 mm (0.0015 in.) feeler gauge can
be inserted between cover and straightedge, pump
assembly should be replaced.
Fig. 68 Checking Oil Pump Cover Flatness
1 - COVER
2 - STRAIGHT EDGE
3 - FEELER GAUGE
Measure thickness and diameter of outer rotor. If
outer rotor thickness measures 20.9 mm (0.825 in.)
or less, or if the diameter is 62.7 mm (2.469 in.) or
less, replace outer rotor (Fig. 69) .
Fig. 69 Measuring Outer Rotor Thickness
AN