Cleaning; Inspection - Chrysler 2004 Concorde Service Manual

9 - 68 ENGINE
OIL PUMP (Continued)
Fig. 111 Oil Pump
1 - OIL PUMP BODY
2 - OIL PUMP OUTER ROTOR
3 - SCREWS
4 - OIL PUMP COVER
5 - OIL PUMP INNER ROTOR

CLEANING

(1) Clean all parts thoroughly in a suitable sol-
vent.

INSPECTION

(1) Disassemble oil pump. (Refer to 9 - ENGINE/
LUBRICATION/OIL PUMP - DISASSEMBLY)
(2) Clean all parts thoroughly. Mating surface of
the oil pump housing should be smooth. Replace
pump cover if scratched or grooved.
(3) Lay a straightedge across the pump cover sur-
face (Fig. 112). If a 0.025 mm (0.001 in.) feeler gauge
can be inserted between cover and straight edge,
cover should be replaced.
Fig. 112 Checking Oil Pump Cover Flatness
1 - STRAIGHT EDGE
2 - FEELER GAUGE
3 - OIL PUMP COVER
(4) Measure thickness and diameter of outer rotor.
If outer rotor thickness measures 14.299 mm (0.563
in.) or less (Fig. 113), or if the diameter is 79.78 mm
(3.141 inches.) or less, replace outer rotor.
Fig. 113 Measuring Outer Rotor Thickness
Fig. 114 Measuring Inner Rotor Thickness
(5) If inner rotor measures 14.299 mm (0.563 in.)
or less replace inner rotor (Fig. 114).
(6) Slide outer rotor into body, press to one side
with fingers and measure clearance between rotor
and body (Fig. 115). If measurement is 0.39 mm
(0.015 inch.) or more, replace body only if outer rotor
is in specifications.
(7) Install inner rotor into body. If clearance
between inner and outer rotors (Fig. 116) is 0.20 mm
(0.008 inch.) or more, replace both rotors.
(8) Place a straightedge across the face of the body,
between bolt holes. If a feeler gauge of 0.077 mm
(0.003 in.) or more can be inserted between rotors
and the straightedge, replace pump assembly (Fig.
117) ONLY if rotors are in specs.
(9) Inspect oil pressure relief valve plunger for
scoring and free operation in its bore. Small marks
may be removed with 400-grit wet or dry sandpaper.
LH