Baudoulin 4M11G Maintenance Manual page 36

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
end bearing and clear metallic knocking sound (especially at low
and high speeds)
6 Excessive clearance between connecting rod and bearing, with
dumb impact sound
7 Excessive clearance of main bearing (similar to knocking sound of
connecting rod bearing)
8 Impact between piston and valve and metallic knocking sound near
cylinder at low speed
9 Excessive gear clearance and knocking sound in gear chamber at
sudden reduction of speed
guarantee specified clearance.
Replace bearing
Replace main bearing
Check valve timing.
Check and adjust gear clearance and
when necessary replace gear.
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