Weichai America Corp.
Revision: August 2019 74
a. Pre-tighten to 30N.m b. turn 120°±4° c. turn 120°±4° again.
The figure below show the tightening sequence of cylinder head bolt in every cylinder head.
(3) The tightening sequence of cylinder head is:
3-4-5-2-1-6
(4) The torque range of cylinder head bolt should be:
M14－12.9：(230～300)N·m
M14－10.9：(190～285)N·m
Key point 2:
Inspection：
1）Measure the protrusion of cylinder sleeve (0.05mm~0.10mm is qualified).
Note that protrusion of cylinder sleeve is average value of X direction and Y direction; and the
measurement should be done without seal rings. Cylinder sleeve for the same engine should be
uniform.
2) No corrosion, scratch and crash damage is allowed for fitting surface and friction surface, wipe
them out and apply clean lubricating oil or grease before assembling.
Assembling:
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