Jeep UNIVERSAL CJ-2A - Page 52

'Jeep' UNIVERSAl,. and 'Jeep' DISPATCHER
D
D-99. Check Valve Timing
To check the valve timing, carefully set the intake
valve adjustment for No. 1 cylinder to .020"
[0,508
mm.] between the tappet and the valve
stem. Rotate the crankshaft clockwise until the
piston in No. 1 cylinder is ready for the intake
stroke. The intake valve opens go before top center
(BTC). Note the distance between the "TC" and
"5°" marks on the indicator on the timing gear
cover and estimate the go before top center position.
With the crankshaft in this position, timing is
correct if the tappet is just tight against the intake
valve stem. Do not overlook resetting the tappet
adjustment to the c::>rrect running clearance.
FIG. 67-FLYWHEEL TIMING MARKS
(Before CJ-2A Engine S/N 175402)
Note: On all model CJ-2A and early model CJ-3A,
the timing marks are on the flywheel and are viewed
through a hole in the engine plate. On model CJ -2A
before
engine S/N 175402, No. 1 cylinder is ready
for the intake stroke when the flywheel IO mark is
in the center of the inspection hole as shown in
Fig. 67. On model CJ-2A beginning with engine
S/N 175402 and on model CJ-3A before engine
S/N 13085g top center and 5° before top center are
marked on the flywheel as shown in Fig. 68. On
model CJ-3A beginning with engine S/N 1308Sg
and all DJ-3A engines the timing marks are on the
timing gear cover.
Note: A 472" [114,3 mm.] starting motor was
placed in production of Model CJ-3A, beginning
with engine S/N 130859. To use the larger starting
motor it was necessary to increase the width of the
cylinder block flange at the motor mounting. This
increased flange width partially covers the location
of the flywheel timing mark inspection hole making
it impossible to provide an opening for timing
FIG. 68-FLYWHEEL TIMING MARKS
(After CJ-2A Engine S/N 175402)
purposes. This is not important however, as timing
marks were transferred to . the timing gear cover
and crankshaft pulley.
Should it be necessary to install a new cylinder
block on an earlier . engine equipped with the
smaller starting motor it may be necessary to use
the timing hole as no other marks are available.
Should such an installation be made, cut away the
flange as required to uncover the timing hole in the
engine plate as shown in Fig. fig.
FIG. 69·-UNCOVERING TIMING
INSPECTION HOLE
1-Starter Motor
2-Cut Away Mounting Flange
3-Timing Inspection Hole
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