Man D2842 LE103 Operating Instructions Manual page 69

Fault
Engine knocking
Engine too "loud"
Carefully read the Operating Instructions before starting any work!
This is especially valid for the chapter on General Safety Instructions
and the safety instructions in each of the chapters.
Possible cause
D Engine not at correct operating tempe­
rature
D Valve clearance not OK
D Valves stick
D Piston pin or crankshaft bearing loose
D Piston ring broken
D Intake or exhaust pipe leaks
D Timing gears worn, gear backlash too
large
D Valve clearance too large
D Turbine and compressor impeller in tur­
bocharger dirty (rough running, out of
balance)
D Poly-V-belt slips
MAN-Industrial diesel engines D2842 LE103
Remedy
D Let engine warm to operating
temperature before running at
full load
D Check thermostat
D Help from the manufacturer ser­
vice
Faults
69