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JR
OIL PUMP (Continued)
(3) Remove oil pump cover screws and lift off cover
plate (Fig. 97).
(4) Remove pump rotors.
(5) Wash all parts in a suitable solvent.
(6) Inspect components carefully for damage or
wear. (Refer to 9 - ENGINE/LUBRICATION/OIL
PUMP - INSPECTION)
Fig. 97 Oil Pump
1 - OIL PUMP COVER
2 - SCREWS (8)
3 - OIL PUMP INNER ROTOR
4 - OIL PUMP HOUSING
5 - OIL PUMP OUTER ROTOR
CLEANING
(1) Clean all parts thoroughly in a suitable sol-
vent.
INSPECTION
(1) Disassemble the oil pump. (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP - DISASSEM-
BLY)
(2) Clean all oil pump components. (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP - CLEANING)
(3) Inspect mating surface of the oil pump housing
and cover. Replace oil pump if deeply scratched or
grooved (minor surface scratches and polishing is
normal).
(4) Lay a straightedge across the pump cover sur-
face (Fig. 98). If a 0.025 mm (0.001 in.) feeler gauge
can be inserted between cover and straight edge,
cover should be replaced.
(5) Measure thickness and diameter of outer rotor.
If outer rotor thickness measures 9.474 mm (0.373
in.) or less (Fig. 99), or if the diameter is 89.174 mm
(3.5108 in.) or less, replace outer rotor.
(6) If inner rotor measures 9.474 mm (0.373 in.) or
less replace inner rotor (Fig. 100).
ENGINE 2.7L DOHC
Fig. 98 CHECKING OIL PUMP COVER FLATNESS -
TYPICAL
1 - STRAIGHT EDGE
2 - FEELER GAUGE
3 - OIL PUMP COVER
Fig. 99 MEASURING OUTER ROTOR THICKNESS
Fig. 100 MEASURING INNER ROTOR THICKNESS
9 - 211
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