MULTICYLINDER ENGINES
121
/
't--t"ri--
Outer rotor
Feeler gauge
___
".-_
'--~
Straightedge
Feeler gauge
3. Thoroughly clean all parts in solvent and blow them
dry with compressed air.
4. Check the drive spindle and pump rotors for signs
of
wear, scoring or damage. Replace damaged parts.
Outer rotor
......
--Body
-....,L---- Feeler
gauge
7. Installation is the reverse
of
removal. Tighten the oil
pump retaining screws to the tightening torque specified
in Table 2. Be sure the governorflyweight assembly is po-
sitioned on the locating pin
(Figure
50).Tighten the
crankshaft nut to the tightening torque specified in Table
4.
Disassembly, inspection
and
reassembly
1. Remove the oil pump cover
(Figure
52).
2. Lift out the inner and outer pump rotors
(Figure
53).
NOTE
The oil
pump
shaft
and
gear
are pressedto-
gether; do not attempt to disassemble them.
The oil
pump
must
be replaced as a unit as-
sembly
if
any parts are damaged.
5. Reinstall the inner rotor in the pump body. Reinstall
the outer rotor in the pump body.
6. Measure the clearance between the inner rotor tip and
outerrotortip
(Figure
54). Compare the results with spec-
ifications in Table 1.
7. Measure the clearance between the outerrotor and the
pump body
(Figure
55). Compare the results with specifi-
cations in Table 1.
8. Place a straightedge across the pump body. Measure
the side clearance between the rotors and straightedge
with a flat feeler gauge
(Figure
56). Compare the mea-
surement with specifications in Tables 1-3.
9. Measure the diameter
ofthe
inner rotor shaft. Measure
the shaft bore
of
the pump body. Calculate shaft clearance
and compare it with specifications in Tables 1-3.
10.
If
any clearance measured in Steps 6-9 is not with
specifications, replace the pump. Individual components
are not available. The pump must be replaced as a unit.
11. When reassembling the oil pump, be sure to lubricate
the rotors, body and shaft with engine oil.
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