Weichai America Corp.
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Fig. 2-2 Exploded view of engine block
2.2.2 step to disassemble Engine Block Module
1. Remove main bearing bolts (key point 1);
2. Remove main bearing caps (key point 2);
2.2.3 Steps to assemble engine block module.
Assembling steps are contrary to disassembling ones.
2.2.4 Inspect and repair engine block module.
Key point 1:
Inspection:
Check and clean engine block. Including but not limited to: Assembly environment must be
clean; check engine block finished surfaces for crash damage, scratch and rust; do not bump and
scratch the parts during assembling, and besides special requirements, sharp corner and edge on
parts must be smoothed.
Assembling:
For 6-cylinder engine, 14 M14－10.9 main bearing bolts are used to fix the bearings. As shown
in Fig. 2-3, start with middle bearings, do the tightening work from middle to two ends evenly,
follow the procedures below: Firstly pre-tighten each bolt to 70Nm, and tighten the bolts for
further 90°±4°.
Fig.2- 3 Tighten order of main bearing bolt
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