Jeep Wrangler 1997 Manual page 292

8D - 1 8 IGNITION SYSTEM
REMOVAL AND INSTALLATION (Continued)
pulley aligns with the top dead center (TDC) mark (0
degree) on timing degree scale (Fig. 44) . Always
rotate the engine in direction of normal rotation. Do
not rotate the engine backward to align the timing
marks .
CRANKSHAFT
VIBRATION DAMPER
TIMING MARK
Fig. 44 Align Timing Marks
J898D-14
(8)
Remove the distributor hold-down bolt and
clamp .
(9) Remove the distributor from
lifting straight up.
(10) Note that the rotor will rotate slightly in a
counterclockwise direction while lifting up the dis-
tributor . The oil pump gear will also rotate slightly in
a counterclockwise direction while lifting up the dis-
tributor. This is due to the helical cut gears on the
distributor and camshaft.
(11) Note the removed position of the rotor during
distributor removal . During installation, this will be
referred to as the Pre-position .
(12) 2.5L 4-Cylinder Engine : Observe the slot in
the oil pump gear through the hole on the side of the
engine . It should be slightly before (counterclockwise
of) the 10 o'clock position (Fig. 45) .
(13) 4.OL 6-Cylinder Engine : Observe the slot in
the oil pump gear through the hole on the side of the
engine . It should be slightly before (counterclockwise
of) the 11 o'clock position (Fig. 46).
(14) Remove and discard the old distributor-to-en-
gine block gasket .
engine by slowly
INSTALLATION
(1)
If the engine crankshaft has been rotated after
distributor removal, cylinder number 1 must be
returned to its proper firing stroke . Refer to previous
10 O'CLOCK POSITION
FRONT
OIL
PUMP
SLOT J958D-6
Fig. 45 Slot At 10 O'clock Position-2 .5L Engine
11 O'CLOCK POSITION
TJ
FRONT
OIL
PUMP
SLOT J958D-7
Fig. 46 Slot At 11 O'clock Position-4.0L Engine
REMOVAL Step 5 and Step 6. These steps must be
done before installing distributor.
(2) Check the position of the slot on the oil pump
gear. On the 2.5L engine, it should be just slightly
before (counterclockwise of) the 10 o'clock position
(Fig. 45) . On the 4.OL engine, it should be just
slightly before (counterclockwise of) the 11 o'clock
position (Fig. 46) . If not, place a flat blade screw-
driver into the oil pump gear and rotate it into the
proper position.
(3) Factory replacement distributors are equipped
with a plastic alignment pin already installed (Fig.
42) . This pin is used to temporarily hold the rotor to
the cylinder number 1 firing position during distrib-
utor installation . If this pin is in place, proceed to
Step 8. If not, proceed to next step.
(4) If the original distributor is to be reinstalled,
such as during engine overhaul, the plastic pin will
not be available . A 3/16 inch drift pin punch tool may
be substituted for the plastic pin.
(5) Remove the camshaft position sensor from the
distributor housing. Lift straight up.