Weichai America Corp.
Revision: August 2019 26
Engine Fastener Torque Specifications
Fastener’s Name Bolt Specification
Tightening torque (N·m) + further
turned angle (°)
Permissible times
of repeat used
Main bearing* M14-10.9
70N·m + (90±4°), required sequence of
tightening (See illustration13)
2
Connecting rod* M10
30N·m + (120±5°), (Reach 67 to 107N·m at
the same time)
0
Cylinder head* M14-12.9
30N·m +2x (120±4°), required sequence of
tightening (See illustration14), (Reach 230 to
300N.m at the same time)
3
Flywheel housing* 10.9 M10-10.9: 80-85Nm; M12-10.9: 140-145Nm
Flywheel* M16-12.9 (290±5) N·m 2
Camshaft gear M10/M8-12.9 M10: (85-90) N·m; M8: (55-60) N·m 2
Valve cover
(10-15) N·m
Oil pan
(20-35) N·m
Balance
mechanism
4XM10 (35+5) N·m
Intermediate gear (65-70) N·m
Exhaust manifold M10 (65-80) N·m
Intake manifold M10 23 N.m -
Crankshaft pulley M16-12.9 (300-310) N·m -
Damper M10-10.9 (65-70) N·m -
Rocker seat M10-8.8 (40-45) N·m -
Spark-plug M14x1.25 (25-28) N·m -
UEGO sensor M18x1.5 (40±5) N·m -
Water temperature
sensor
M14x1.5 (25±5) N·m -
① Values of superscript and subscript are permissible tolerance ranges
② The angle value is the further turned angle after reaching the specific torque
③ The number before the angle is the number of time to turn the angle
④ There are corresponding requirements on the strength classes of the bolts and nuts used at various positions of the
engine. It is forbidden to interchange the bolts and nuts of the same size but of different strength classes. It is
impermissible to exceed the allowed times of repeat use. Otherwise it will bring about severe outcome.
*It is required to apply oil on bolt spread and contact surface
Table 5
CAUTION
Failure to follow these instructions could cause damage or decrease the life of equipment.
Note in above Table 5 that connecting rod bolts cannot be re-used.
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