4.2L Distributor Removal; 4.2L Distributor Installation - Jeep 1987 Wrangler Workshop Manual

ELECTRICAL
IGNITION
S Y S T E i -
MOTORCRAFT (6-Cyl. Engine)
4.2L DISTRIBUTOR REMOVAL
Unfasten the distributor cap retaining screws.
Remove the distributor cap with the coil and
spark plug wires connected and place aside.
Disconnect and plug the distributor vacuum
advance hose.
Disconnect the distributor primary wiring
connector.
Scribe a mark on the distributor housing in line
with the tip of the rotor. Scribe a mark on the
distributor housing near the clamp and continue
the scribe mark on the engine block in line with
the distributor housing mark. Note the position of
the rotor and distributor housing in relation to the
surrounding engine components as reference
points for installing the distributor.
Remove the distributor holddown bolt and
clamp.
Withdraw the distributor carefully from the
engine.
4.2L DISTRIBUTOR INSTALLATION
Clean the distributor mounting area of the
cylinder block.
Install a replacement distributor mounting
gasket in the counterbore of the cylinder block.
Position the distributor shaft in the cylinder
block. If engine was not rotated while the
distributor was removed, perform the following
procedure:
Align the rotor tip with the mark scribed on the
distributor housing during removal. Turn the
rotor approximately 1/8-turn counterclockwise
past the scribe mark.
CAUTION: Ensure that the distributor shaft fully
engages the oil pump drive gear shaft. It may be
necessary to slightly rotate (bump) the engine
while applying downward hand force on the
distributor body to fully engage the distributor
shaft with the oil pump drive gear shaft.
Slide the distributor shaft down into the engine.
Align the scribe mark on the distributor housing
with the corresponding scribe mark on the
cylinder block.
NOTE: It may be necessary to move the rotor
and shaft slightly to start the gear into mesh with
the camshaft gear and to engage the oil pump
drive tang, but the rotor should align with the
scribe mark when the distributor shaft is down in
place.
Install the distributor holddown clamp and bolt,
but do not tighten the bolt.
If the engine was rotated while the distributor
was removed, it will be necessary to establish
timing according to the following procedure.
Remove the No. 1 spark plug. Hold a finger over
the spark plug hole and rotate the engine until
the compression pressure is felt. Slowly
continue to rotate the engine until the timing
index on the vibration damper pulley aligns with
the top dead center (TDC) mark (0 degree) on
the timing degree scale. Always rotate the
engine in the direction of normal rotation. Do not
turn the engine backward to align the timing
marks.
Turn the distributor shaft until the rotor tip points
in the direction of the No. 1 terminal in the
distributor c a p . Turn the rotor 1/8-turn
counterclockwise past the position of the No. 1
terminal.
C-97