Isuzu NHR 4J Series, Workshop Manual

Page: 131 / 406

6A – 64 GENERAL ENGINE MECHANICAL
12) Carefully wipe any oil or other foreign material from
connect rod bearing back face and the connecting rod
bearing fitting surface.
13) Apply a coat of engine oil to the upper bearing
surfaces.
Apply a coat of engine oil to the cylinder wall.
14) Position the piston head from mark so that it is facing
the front of engine.
Use the piston ring compressor to compress the piston
rings.
Piston Ring Compressor: 5-8840-9018-0 (J-8037)
15) Use a hammer grip to push the piston in until the
connecting rod makes contact with the crankpin.
At the same time, rotate the crankshaft until the
crankpin is at BDC.
16) Position the bearing cap front mark so that it is facing
the front of the engine.
17) Install the connecting rod bearing caps.
Align the bearing cap cylinder number marks and the
connecting rod cylinder number marks.
18) Apply a coat of engine oil to the threads and setting
faces of each connecting rod cap bolt.
19) Tighten the connecting rod bearing cap bolts to the
specified torque in two steps using the Angular
Tightening Method.
Connecting Rod Bearing Cap Bolt
Torque
N ∙ m (kg ∙ m/lb ∙ ft)
1st Step 2nd Step
4JG2 29 (3.0/22) 45° - 75°
4JB1/4JB1TC 83 (8.5/61)
NOTE
Check to see that the crankshaft turns smoothly by
rotating it manually.
6A-64-1.tif
6A-64-3.tif
6A-64-2.tif
6A-64-4.tif