Weichai America Corp.
86
12
APPENDIX A
Appendix A: Torsional Torque and Tightening Method for Main Bolts and Nuts
Bolts
Bolts Specification Tightening
torque(N·m)
Inspect value
(N·m)
Intake manifold bolt
M10
45
～
50
40
～
60
Exhaust manifold bolt
M10
45
～
50
45
～
60
Flywheel bolt
M16-10.9
285
～
295
285
～
340
Fastening bolt of crankshaft pulley
M16-12.9
300
～
310
300
～
360
Damper fastening bolt
M10-10.9
65
～
70
65
～
80
Camshaft gear bolt
M10×1.25-12.9
85
～
90
85
～
110
Bolt of Intermediate Gear Shaft
M10
65
～
70
65
～
80
Fastening Nut of Signal Generator
Driving Gear
M10-10.9
65
～
70
65
～
80
Nuts of Signal Generator Shaft
M14×1.5
85
～
100
85
～
110
Hexagon bolts and stud of flywheel
M12-12.9
140
～
145
140
～
170
M10-12.9
80
～
85
80
～
95
Bolts of Oil Pan
Socket head screws of oil pan
M8-8.8
20
～
25
20
～
35
M8-10.9
30
～
35
30
～
45
Bolts of Oil Pump
Stud with self-locking nuts
M8-12.9
30
～
40
30
～
50
M8-8.8
20
～
25
20
～
35
Bolt of Rocker-Arm Seat
M10-8.8
40
～
45
40
～
55
Rocker adjusting nut
M9×1
20
～
25
20
～
35
Spark Plug
M14
25~28
Fastening bolt of cylinder head cover
M8-8.8
10
～
15
10
～
25
Fastening bolt of pulley on hub
M10-10.9
65
～
70
65
～
80
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