Baudoulin 4M11G Maintenance Manual page 48

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
3) Assemble the cylinder head onto the cylinder block.
4) Loose cylinder head bolt;
5) Tighten the cylinder head bolts to 30N.m, rotate the bolts for 120°±4°, and then rotate
further for 120°±4°.
6) The tightening sequence for the cylinder head bolts of each cylinder is shown in figure
below. The tightening sequence for the cylinders is 2nd, 3rd, 4th, and 1st cylinders.
Notice: Each bolt is stretched by (0.2~0.6) mm during every tightening process. The
maximum allowable length is 160.5mm for the bolts after repeated use. Any bolt in excess of
this length must be replaced with new one.
Figure 4-6 Tightening Sequence of Bolts
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