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9-26
E N G I N E O I L I N G S Y S T E M 4 C Y L l N D E R
Fig. 56-Measuring
Clearance Between Rotors
(4)
If the inner rotor length measures less than
.649 inch (Fig. 53), replace the inner rotor.
(5) Slide the outer rotor and inner rotor into the
pump body and place a straightedge across the face
between the bolt holes (Fig. 54).
(6 If a feeler gauge of more than .004 inch can
be inserted between the rotors and straightedge, re-
place the pump body.
(7) Remove the inner rotor and shaft leaving the
outer rotor in the pump cavity.
(8) Press the outer rotor body to one side with the
fingers and measure the clearance between the outer
rotor and the pump body (Fig. 55). If the measure-
ment is more than .012 inch, replace the oil pump
body.
(9) If the clearance between the inner rotor and
outer rotor (Fig. 56) is more than .010 inch, replace
the inner and outer rotors.
(10) Inspect the oil pump relief valve plunger for
scoring and for free operation in its bore. Small scores
may be removed with 400 grit wet or dry paper pro-
viding extreme care is used not to round off the sharp
edge portion of the valve.
(11) For 170-225 cubic inch engines the relief valve
-
STANDARD SCREW FITS
I N
.
. .
-
Fig. 57-ffeli-Coil
Installation
has a free length of
2°/82
to 219/64 inch and i s red in
color.
(12) If the oil pressure is low, inspect for worn
bearings, or look for other causes of possible loss
of
oil pressure.
Assembly
(1) Assemble the pump, using new parts as
re-
quired.
(2) Install new oil seal rings between the cover and
the body. Tighten the cover bolts to 130 inch-pounds
torque.
Installation
(1) Install the oil pump, without the outer rotor
and cover, using a new gasket.
(2) Install the outer rotor, seal, pump cover and oil
filter.
(3) Center the engine to its original position. Us-
ing a jack stand to support the front end of the en-
gine, and install the front engine mounts.
(4) Connect the fuel line, throttle linkage, upper
and lower radiator hoses.
(5)
Refill the radiator.
OIL FILTER
The oil filter should be replaced every 6 months
to
(1)
Using Tool C-3845, unscrew the filter from base
(2) Wipe the base clean.
coincide with an engine oil change.
of oil pump and discard.
HELI-COIL
INSERT
INSERTING
EXTRACT-
DRILL
TAP
TOOL
ING TOOL
Thread
Part
Insert
Part
Part
Part
Size
No.
Length
Size
No.
No.
No.
w-20
1
185-4
%I1
"164
(-266)
4 CPB
528-4N
1227-6
'/I
6-1 8
1 185-5
1 5 1 ~ ~ 1 1
Q (.332)
5 CP B
528-5N
1227-6
%-16
1
185-6
9 / 1 6 1 1
X (.332)
6
C PB
528-6N
1227-6
7116-14
1
185-7
2 r 1 3 , 1 '
19/64
(e4531
7 C PB
528-7N
1
227-
1
6
%-13
1
185-8
%I1
"164
(a51 6)
8 C P B
528-8N
1227-1
6
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