Weichai America Corp.
Revision: October 2018 25
Engine Fastener Torque Specifications
Fastener’s Name Bolt Specification
Tightening torque (N·m) + further
turned angle (°)
Permissible times
of repeat used
Main bearing M18-10.9
The first time 80N·m, the second time
250~280N·m (See illustration13)
2
Connecting rod M14x1.5-12.9
120N·m + (90±5°), (Reach 170 to 250N·m at
the same time)
0
Cylinder head M16-12.9
200N·m +2x (90±5°), required sequence of
tightening (See illustration14), (Reach 240 to
340N.m at the same time)
3
Flywheel M14x1.5
60N·m +2x(90±5°), (Reach 230 to 280N·m at
the same time)
2
Flywheel housing 110 to 140N·m 2
Camshaft gear M8-12.9 40 to 45N·m
Exhaust manifold M10 50 to 70N·m 2
Intake manifold M10 45+5N.m -
Damper M10-10.9 65 to 70N·m -
Spark-plug M14x1.25 (25 to 28) N·m -
UEGO sensor M18x1.5 40N.m±5N·m -
Water temperature
sensor
M14x1.5 25N.m±5N·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.
Table 5
Illustration 13
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.
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
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