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9 - 212
ENGINE 2.7L DOHC
OIL PUMP (Continued)
Fig. 101 MEASURING OUTER ROTOR CLEARANCE
IN HOUSING
1 - FEELER GAUGE
2 - OUTER ROTOR
Fig. 102 MEASURING CLEARANCE BETWEEN
1 - OUTER ROTOR
2 - FEELER GAUGE
3 - INNER ROTOR
(7) Slide outer rotor into body, press to one side
with fingers and measure clearance between rotor
and body (Fig. 101). If measurement is 0.39 mm
(0.015 in.) or more, replace body only if outer rotor is
in specifications.
(8) Install inner rotor into body. If clearance
between inner and outer rotors (Fig. 102) is 0.20 mm
(0.008 in.) or more, replace both rotors.
ROTORS
(9) 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.
103) ONLY if rotors are in specification.
Fig. 103 MEASURING CLEARANCE OVER ROTORS
1 - STRAIGHT EDGE
2 - FEELER GAUGE
(10) 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.
(11) The relief valve spring has a free length of
approximately 49.5 mm (1.95 in.) it should test
between 23 – 25 pounds when compressed to 34 mm
(1.34 in.). Replace spring that fails to meet specifica-
tions.
(12) Assemble oil pump. (Refer to 9 - ENGINE/LU-
BRICATION/OIL PUMP - ASSEMBLY)
ASSEMBLY
(1) Assemble pump using new parts as required.
(2) Tighten cover screws to 12 N·m (105 in. lbs.)
(Fig. 97).
(3) Tighten oil pressure relief valve retaining cap
to 12 N·m (105 in. lbs.) (Fig. 96).
(4) Prime oil pump before installation by filling
rotor cavity with engine oil.
INSTALLATION
CAUTION: Crankshaft position must be at 60° ATDC
of No.1 cylinder before installing oil pump (Fig. 94).
This position will properly locate oil pump. If not
properly located, severe damage to oil pump can
occur.
(1) Prime oil pump before installation by filling
rotor cavity with engine oil.
JR
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