Jeep UNIVERSAL CJ-2A - Page 82

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
E
in the oil passage directly below the oil pump intake
passage. If these two pipe plugs were ·removed,
make certain ·they are reinstalled in the locations
described above or the counterweight of the
crankshaft might strike the projecting head of the
square-head plug.
E-81. lnstaiiTappets
Turn the block upside down. Beginning at the
rear end of the cylinder block, install the intake
and exhaust valve tappets in the tappet bores in
the cylinder block in the following order: one
exhaust,· two intake, two exhaust, two intake, and
finally one exhaust valve tappet.
Check the tappet to bore fit of each tappet as it
is installed in the block. If the stem-to-block
clearance tolerance of .0005" to .002" [0,0013 a
0,0051 mm.] is exceeded install a new tappet fitting
within this tolerance or ream the bore to accomo-
date the next oversize tappet which is available
in
1
.004" oversize.
E-82. Install Camshaft and Thrust Plate
Lubricate all camshaft bearings and cam surfaces
generously with clean, light engine oil. Carefully,
so not to damage or score the camshaft front bear-
ing, install the camshaft, locating it properly in
the bearings. Do not allow the rear end ofthe cam-
shaft to strike sharply against the expansion plug
installed in the rear end of the bore.
Install the camshaft thrust plate. Slide the thrust
plate spacer onto the end of the camshaft with the
beveled inner edge of the spacer facing the cam-
shaft. If the same camshaft is being reinstalled;
install any shims previously removed. These shims
are placed between the camshaft shoulder and the
spacer. Torque the thrust plate attaching bolts 20
to 26 lb-ft. [2,8 a 3,6 kg-m.].
End play of the camshaft is determined by running
clearance between the rear face of the camshaft
gear and the thrust plate. The standard clearance
is .004" to .007" [0,102 a 0,178 mm.] as measured
by a dial indicator. Should a check show too little
end play, place a shim of suitable thickness between
the camshaft shoulder and the spacer. Too much
end play may be corrected by removing shims or
dressing off the spacer a slight amount. See Fig. 101.
E-83. Install Crankshaft and Bearings
Fit the three upper main bearings into their
respective locations in the cylinder block. Fit the
three lower main bearings into their respective
bearing caps.
NOTE: It is possible to incorrectly install the front
main bearing. The bearing is properly installed in
the cap with the narrower of the two radial oil
grooves
toward the front edge of the cap. If this
bearing is not properly installed, the oil grooves in
the two halves of the bearing will not match at the
parting line and premature failure of the bearing
will result.
Lubricate all bearing surfaces generously with
clean, light engine oil. Place the crankshaft in
position in the cylinder block and install the main
bearing caps.. Torque the bolts 65 to 75 lb-ft.
[9,0 a 10,4 kg-m.] rotating the crankshaft after
each bearing cap is tightened
FIG. 102-GAUGING CRANKSHAFT END PLAY
E-84. Check Crankshaft End-Play
End play of the crankshaft .is set by the running
clearance between the crankshaft thrust washer
and the front face of the front main bearing. The
standard end play is .004" to .006" [0,102 a 0,152
mm.] which is controlled by .002" [0,051 mm.]
shims placed between the thrust washer and the.
shoulder on the crankshaft. Check the end play
with a dial indicator as shown in Fig. 102. If clear-
ance is incorrect, adjustment is made by adding or
removing shims.
Install the thrust washer with the beveled inner
edge toward the front bearing.
E-85. Install Crankshaft Timing Gear
Install the woodruff key in the longer of the two
keyways on the front end of the crankshaft. Install
the crankshaft timing gear on the front end
of the crankshaft with. the timing mark facing
out, away from the cylinder block. Align the
keyway in the gear with the woodruff key and then
drive or press the gear onto the crankshaft firmly
against the thrust washer.
E-86. Install Crankshaft Rear Bearing Seal
When installing the crankshaft rear bearing seal
around the crankshaft, apply a thin coat of light
cup grease to both halves of the seal except for the
ends which are already treated with sealing com-
pound. When installing the rear main bearing cap
in the crankcase, place a small amount of plastic-
type gasket cement on both sides and face of the
cap to prevent oil leakage. Insert the rubber
packings shown in Fig. 1 OS into the holes between
the bearing cap and the case. Do not trim these
packings. The packings are of a predetermined
length that will cause them to protrude approxi-
mately 7i" [6 mm.] from the case. When the oil
pan is installed, it will force them tightly into the
holes and effectively seal any opening between
the bearing cap and the crankcase.
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