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Westerbeke Universal M-50 - Bolt Torques Guide

Westerbeke Universal M-50
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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-30
M-40
Head bolts and nuts
7.5
to
8.0
kgf/m
7.5
to
8.0
kgf/m
(54.2 to
57.9
ftllbs.) (54.2 to
57.9
ftllbs.)
Bearing case bolts 1
3.0
to
3.5
kgf/m
3.0
to
3.5
kgflm
(21.7
to
25.3
ftllbs.)
(21.7
to
25.3
ftllbs.)
Bearing case bolts 2
3.0
to
3.5
kgf/m
3.0
to
3.5
kgflm
(21.7
to
25.3
ftllbs.)
(21.7
to
25.3
ftllbs.)
Flywheel bolts
10
to
11
kgf/m
10
to
11
kgf/m
(72.3 to
79.6
ft.llbs.)
(72.3 to
79.6
ftllbs.)
Connecting rod bolts
3.7 to 4.2 kgflm
3.7 to 4.2
kgf/m
(26.8 to 30.4 ftllbs.)
(26.8
to 30.4 ftllbs.)
Rocker arm bracket studs
1.7
to
2.1
kgf/m
1.7
to
2.1
kgf/m
(12.3
to
15.2
ftllbs.)
(12.3
to
15.2
ftllbs.)
Idle
gear shaft bolts
1.0
to
1.15
kgf/m
1.0
to
1.15
kgf/m
(7.23 to
8.31
ftllbs.)
(7.23 to
8.31
ftllbs.)
Glow plugs
2.0
to 2.5 kgflm
2.0 to 2.5
kgf/m
(No neea to apply oil)
(14.5
to
18.1
ftllbs.)
(14.5
to
18.1
ftllbs.)
Drain plugs
4.0
to
4.5
kgf/m
4.0
to
4.5
kgf/m
(28.9
to 36.2 ftllbs.)
(28.9
to 36.2 ftllbs.)
Nozzle holders
3 to 5 kgf/m
3 to 5
kgf/m
(21.7
to 36.2 ftllbs.)
(21.7
to 36.2 ftllbs.)
Bis
0.14
to 0.2
kgf/m
0.14
to 0.2
kgf/m
Oil
(10.1
to
14.5
ftllbs.)
(10.1
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
ftllbs.)
Fuel limit lock
nut
2.8 to
3.5
kgf/m
2.8 to
3.5
kgf/m
(20.3
to
25.3
ftllbs.)
(20.3
to
25.3
ftllbs.)
Fuel limit
cap nut
2.5 to
3.0
kgf/m
2.5 to
3.0
kgf/m
(18.1
to
21.7
ftllbs.)
(18.1
to
21.7
ftllbs.)
Injection
pipes
1.5
to 2.6 kgf/m
1.5
to 2.6 kgflm
(10.8
to
18.8
ftllbs.)
(10.8
to
18.8
ftllbs.)
Crankshaft nut
14
to
16
kgf/m
14
to
16
kgf/m
(101
to
116
ftllbs.)
(100
to
116
ftllbs.)
Air vent screw
1.4
to
1.8
kgf/m
1.4
to
1.8
kgflm
(on injection pump)
(10.1
to
13.0
ftllbs.)
(10.1
to
13.0
ftllbs.)
.
16

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