BOLT TORQUES
As a lot of bolts and nuts
in
the engine are of special shape,
be
careful
to
tighten them correctly using a torque
wrench.
When tightening,
follow this method:
First tighten
all the bolts 50% of the regular torque, then tighten them fully.
TIGHTENING BOLTS OF IMPORTANT PARTS
• Marked bolts must
be
tightened after applying oil.
Model
M-12 M2-12
• Head bolts and nuts
4.0
to
4.5
kgf/m
4.0
to
4.5
kgf/m
28.9
to 32.5 ft/lbs.
28.9
to 32.5 ftllbs.
•
Bearing case bolts 1
1.3
to
1.6
kgf/m
1.3
to
1.6
kgf/m
9.4
to
11.6
ft/lbs.
9.4
to
11.6
ft/lbs.
•
Bearing case bolts 2
2.7 to
3.1
kgf/m 2.7 to
3.1
kgf/m
19.5
to 22.4 ftllbs.
19.5
to 22.4 ft/lbs.
• Flywheel bolts
5.5
to
6.0
kgf/m
5.5
to
6.0
kgf/m
39.8
to 43.4 ftllbs.
39.8
to 43.4 ftllbs.
•
Connecting
rod
bolts
1.5
to
1.9
kgf/m
1.5
to
1.9
kgf/m
10.8
to
13.7
ft/lbs.
10.8
to
13.7
ft/lbs.
•
Rocker arm bracket
1.0
to
1.15
kgf/m
1.0
to
1.15
kgf/m
studs
7.23
to
8.32
ft/lbs. 7.23 to
8.32
ft/lbs.
• Idle
gear shaft bolts
1.0
to
1.15
kgf/m
1.0
to
1.15
kgf/m
7.23 to
8.32
ft/lbs. 7.23 to
8.32
ft/lbs.
Glow plugs
2.0 to
2.5
kgf/lbs. 2.0 to 2.5 kgf/m
(No need to
apply oil)
14.5
to
18.1
ft/lbs.
14.5
to
18.1
ft/lbs.
Drain plugs
3.3
to
3.8
kgf/m
3.3
to
3.8
kgf/m
23.9
to
27.5
ftllbs.
23.9
to
27.5
ftllbs.
Nozzle holders
5.0
to
7.0
kgf/m
5.0
to
7.0
kgf/m
36.2 to
50.6
ftllbs. 36.2 to
50.6
ftllbs.
Bis
1.5
to
2.0
kgf/m
1.5
to 2.0 kgf/m
Oil
10.8
to
14.5
ft/lbs.
10.8
to
14.5
ftllbs.
switch
Taper Screw
1.5
to 2.0 kgf/m
1.5
to
2.0
kgf/m
10.8
to
14.5
ftllbs.
10.8
to
14.5
tt/lbs.
Fuel limit lock
nut
0.8
to
1.0
kgf/m
0.8
to
1.0
kgf/m
5.8
to
7.2
ft/lbs.
5.8
to
7.2
ftllbs.
Fuel limit
cap nut
0.8
to
1.0
kgf/m
0.8
to
1.0
kgf/m
5.8
to
7.2
ft/lbs.
5.8
to
7.2
ft/lbs.
Injection
pipes
2.5
to
3.5
kgf/m
2.5 to
3.5
kgf/m
18.1
to
25.3
tt/l
bs.
18.1
to
25.3
ftllbs.
•
Crankshaft nut
10.0
to
11.0
kgf/m
10.0
to
11.0
kgf/m
72.3
to
79.6
ft/lbs.
72.3 to
79.6
ft/lbs.
Air vent screw
Not Used Not Used
(on
injection pump)
34
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