Isuzu AA-6HK1T, Workshop Manual

Page: 153 / 242

6A–102 ENGINE MECHANICAL
Crankshaft Bearing Inside Diameter
1. Clean the cylinder body and lower crankcase
bearing fitting surfaces. Clean the bearing inside and
outside surfaces.
2. Install the lower crankcase with the bearings to the
cylinder body.
3. Apply molybdenum disulfide grease to the lower
crankcase bolt threads and setting faces.
4. Tighten the lower crankcase M14 bolts in three steps
using the angular tightening method.
Torque:
1st step : 98 N·m (10 kgm/72 lbft)
2nd step: 132 N·m (13.5 kgm/98 lbft)
3rd step: 30 – 60 deg.
NOTE: Cylinder body lower crankcase M14 bolts can be
reused 6 times before replacement.
5. Tighten the lower crankcase M10 bolts to the
specified torque.
Torque: 37 N·m (3.8 kgm/27 lbft)
6. Use an inside dial indicator to measure the
crankshaft bearing inside diameter.
Crankshaft Journal and Bearing Clearance
If the clearance between the measured bearing inside
diameter and the crankshaft journal diameter exceeds
the specified limit, the crankshaft must be replaced.
Crankshaft journal and Bearing clearance
Standard:
No.4 journal: 0.093 – 0.124 mm (0.00366 – 0.00488 in)
Others: 0.063 – 0.094 mm (0.00248 – 0.00370 in)
Limit: 0.14 mm (0.0055 in)
2
1
1
3 4
2
015EY00195
1
2 3
4 5
6 7
8 9
A
0
B C
D
012EY00015
23 19 15 11 7 3 1 5 9 13 17 21 25
24 20 16 12 8 4 2 6 10 14 18 22
012EY00062
014EY00121