Jeep Cherokee 2000 Service Manual - page 1024
(9) Push the crankshaft forward and backward.
Load the crankshaft front or rear and tighten cap
bolt No.2 to 54 N·m (40 ft. lbs.) torque. Then tighten
to 95 N·m (70 ft. lbs.) torque and finally tighten to
108 N·m (80 ft. lbs.) torque.
(10) Rotate the crankshaft after tightening each
main bearing cap to ensure the crankshaft rotates
freely.
(11) Check crankshaft end play. Crankshaft end
play is controlled by the thrust bearing which is
flange and installed at the No.2 main bearing posi-
tion.
(a) Attach a magnetic base dial indicator to the
cylinder block at either the front or rear of the
engine.
(b) Position the dial indicator rod so that it is
parallel to the center line of the crankshaft.
(c) Pry the crankshaft forward, position the dial
indicator to zero.
(d) Pry the crankshaft forward and backward.
Note the dial indicator readings. End play is the
difference between the high and low measurements
(Fig. 79). Correct end play is 0.038-0.165 mm
(0.0015-0.0065 inch). The desired specifications are
0.051-0.064 mm (0.002-0.0025 inch).
(e) If end play is not within specification, inspect
crankshaft thrust faces for wear. If no wear is
apparent, replace the thrust bearing and measure
end play. If end play is still not within specifica-
tion, replace the crankshaft.
(12) If the crankshaft was removed, install the
crankshaft into the cylinder block (refer to Cylinder
Block - Assemble).
(13) Install the oil pan.
(14) Install the drain plug. Tighten the plug to 34
N·m (25 ft. lbs.) torque.
(15) Install new rearmain seal. Refer to Rear Main
Seal in this section.
(16) Lower the vehicle.
(17) Install the spark plugs. Tighten the plugs to
37 N·m (27 ft. lbs.) torque.
(18) Fill the oil pan with engine oil to the safe
mark on the dipstick level.
(19) Connect negative cable to battery.
OIL PAN
REMOVAL
(1) Disconnect negative cable from battery.
(2) Raise the vehicle.
(3) Remove the oil pan drain plug and drain the
engine oil.
(4) Disconnect the exhaust pipe at the engine
exhaust manifold.
(5) Disconnect the exhaust hanger at the catalytic
converter and lower the pipe.
(6) Remove the engine starter motor.
(7) Remove the flywheel/torque converter housing
access cover.
(8) Position a jack stand directly under the engine
vibration damper.
(9) Place a piece of wood (2 x 2) between the jack
stand and the engine vibration damper.
(10) Remove the engine mount through bolts.
(11) Using the jack stand, raise the engine until
adequate clearance is obtained to remove the oil pan.
(12) If
equipped,
disconnect
the
transmission
cooler lines and oxygen sensor harness from oil pan
mounting studs.
(13) Remove the oil pan bolts and studs. Carefully
remove the oil pan and gasket.
INSTALLATION
(1) Clean the block and pan gasket surfaces.
(2) Fabricate 4 alignment dowels from 1/4 x 1 1/2
inch bolts. Cut the head off the bolts and cut a slot
into the top of the dowel. This will allow easier
installation and removal with a screwdriver (Fig. 80).
(3) Install two dowels in the timing case cover.
Install the other two dowels in the cylinder block
(Fig. 81).
(4) Apply Mopar
t
Silicone Adhesive Sealant onto
the cylinder block in four location as shown (Fig. 82)
(5) Slide the one-piece gasket over the dowels and
onto the block and timing case cover.
(6) Position the oil pan over the dowels and onto
the gasket.
(7) Install the 1/4 inch oil pan bolts. Tighten these
bolts to 9.5 N·m (84 in. lbs.) torque. Install the 5/16
Fig. 79 Crankshaft End Play Measurement
1 – DIAL INDICATOR
2 – CRANKSHAFT
XJ
2.5L ENGINE
9 - 49
REMOVAL AND INSTALLATION (Continued)