Isuzu NHR 4J Series, Workshop Manual

Page: 105 / 406

6A – 38 GENERAL ENGINE MECHANICAL
11. Crankshaft Rear Oil Seal (Gear and Belt Drive Model)
Use the oil seal installer to install the oil seal to the cylinder
body.
Installer: Rear Oil Seal 5-8840-2359-0
NOTES:
Wipe off rust and scraps clean from the press-in
portion of the oil seal.
Take note of the press-in direction of the oil seal.
1) Install the adapter of the special tool to the rear end of
the crankshaft with two bolts.
2) Install the oil seal to the outer circumference of the
adapter.
3) Insert the slave into the adapter portion, and tighten it
in with the bolt (M12 x 1.75L=70) until the adapter
section hits the slave.
4) Remove the adapter and the slave.
5) After installing the oil seal, check the measurement of
the oil seal.
Standard mm (in)
12.2 - 12.8 (0.48 - 0.50)
10. Cylinder Block Rear Plate
Align the rear plate with the cylinder body knock pins.
Tighten the rear plate to the specified torque
N ∙ m (kg ∙ m/lb ∙ ft)
82 (8.4/61)
9. Flywheel
1) Thoroughly clean the remove the oil from the threads
of crankshaft.
2) Mount the flywheel on the crankshaft and then install
the washer.
3) Apply a coat of engine oil to the threads of the flywheel
bolts.
4) Align the flywheel with the crankshaft dowel pin.
5) Tighten the flywheel bolts to the specified torque in two
steps using the Angular Tightening Method.
Follow the numerical order shown in the illustration.
Flywheel Bolt Torque N ∙ m (kg ∙ m/lb ∙ ft)
1st Step 2nd Step
59 (6.0/43) 60° - 90°
8. Piston and Connecting Rod
7. Piston Cooling Oil Pipe
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