Crankshaft Replacement; Rear Main Bearing Oil Seal Replacement - Jeep J-10 Series 1982 Technical & Service Manual

1B-24 ENGINES
BEND HEAD TO FOLLOW
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Fig. 11-39 Fanrlctteri Upper KalnBeartig
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and indented or notched side of block. Rotate bearing
into place and remove tool from oil hole in crankshaft
journal.
(5) Apply oil to replacement lower bearing insert
and install in bearing cap.
(6) Install main bearing cap with arrows pointing
toward rear of engine.
(7) Tighten main bearing cap bolts with 65 foot
pounds (88 N*m) torque.
Roar Main Bearing Oil Soal Rtpltctma!
Removal
The rear main bearing oil seal is a one piece unit and
can be removed and installed without removal of the oil
pan or crankshaft.
(1) Disconnect battery negative cable.
(2) Raise vehicle.
(3) Remove transmission and transfer case as an
assembly. Refer to Transmission Removal in Chapter2B
or 2C for procedure.
(4) Remove starter motor cable and solenoid wire.
Remove starter motor.
(5) If manual transmission, remove inspection plate
from flywheel housing.
(6) If manual transmission, remove hydraulic
clutch slave cylinder from flywheel housing.
(7) Remove flywheel/drive plate housing bolts and
housing from engine.
(8) If manual transmission, remove clutch pressure
plate and disc assembly by loosening bolts 1/4 turn in
equal amounts until pressure is relieved.
(9) Mark flywheel/drive plate location to facilitate
correct assembly. Remove bolts and flywheel/drive
plate.
(10) Using a small blade screwdriver, pry out rear
main oil seal. Use care to prevent damaging seating
groove or crankshaft.
Instillation
(1) Center replacement seal over crankshaft with
lip of seal facing toward front of engine. With a soft
hammer (plastic), tap around perimeter of seal until it
seats in groove. Use care to prevent seal from binding on
crankshaft and not seating properly.
(2) Attach flywheel/drive plate to crankshaft and
tighten bolts with 68 foot-pounds (93 N«m) torque.
(3) If manual transmission, install clutch pressure
plate and disc assembly. Tighten bolts 1/4 turn in equal
amounts until assembly is flush against flywheel.
Tighten bolts with 18 foot-pounds (25 N*m) torque.
NOTE: Use Alignment ToolJ-5824-01, or equivalent, to
align clutch disc prior to tightening bolts.
(4) Install flywheel/drive plate housing and tighten
bolts with 35 foot-pounds (47 N«m) torque.
(5) If manual transmission, install inspection plate
on flywheel housing.
(6) If manual transmission, install hydraulic clutch
slave cylinder on flywheel housing. Tighten bolts with
18 foot-pounds (25 N«m) torque.
(7) Install transmission/transfer case assembly.
Refer to Chapter 2B for procedure.
(8) Install starter motor, cable and solenoid wire.
Refer to Chapter 2B or 2C for procedure.
(9) Lower vehicle.
(10) Connect battery negative cable.
WARNING: Use extreme caution when engine is oper
ating. Do not stand in direct line with fan. Do not put
hands near pulleys, belts or fan. Do not wear loose
clothing.
(11) Start engine and inspect for leaks.
CRANKSHAFT REPLACEMENT
Removal
(1) Remove engine from vehicle.
(2) Mount engine on suitable stand.
(3) Remove spark plugs.
(4) Remove fan and pulley.
(5) Remove crankshaft vibration damper and hub
assembly.
(6) Remove oil pan and oil pump assembly.
(7) Remove timing case cover.
(8) Remove crankshaft timing gear.
(9) Remove connecting rod bearing caps and bear
ing inserts. Mark each for installation identity.
(10) Move connecting rod and piston assemblies
away from crankshaft.
(11) Remove main bearing caps with bearing inserts
and mark for installation identity.
(12) Remove crankshaft and upper bearing inserts.
Mark inserts for installation identity.