Faults
84
Carefully read these 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.
Fault Possible cause Remedy
Poor performance D Air filter clogged
D Exhaust pipe clogged
D Air intake pipe leaks
D Charge mixture cooler dirty/leaks
D Charge mixture ducting leaks
D Turbocharger leaks, faulty, dirty
D Insufficient compression in cylinder or
more than 3-4 bar pressure difference
between the cylinders
D Remedy from manufacturer ser
vice
Coolant temperature
too high, loss of coolant
D Coolant level too low
D Air in coolant circuit
D Radiator very dirty, fins clogged
D V-belt for coolant pump not correctly
tightened (slips)
D Cap with work valves on expansion
tank/radiator is faulty or leaks
D Temperature display faulty
D Coolant pump leaks, defective (bearing
damage)
D Thermostat faulty, does not open
D Coolant lines leak, clogged or twisted
D Remedy from manufacturer ser
vice
Lube-oil pressure too
low
D Oil level in oil pan too low
D Engine temperature to high
D Oil pressure indicator faulty
D Selected oil viscosity is inappropriate for
ambient temperature (too thin)
D Oil in oil pan is too thin (contains con
densation)
D Bearing heavily worn
D Oil pump gears heavily worn
D Safety valve in oil circuit faulty (does not
close, spring is worn or broken)
D See "Fuels, Lubricants and Coo
lants..."
D Remedy from manufacturer ser
vice
Lube-oil pressure too
high
D Engine cold
D Selected oil viscosity is inappropriate for
ambient temperature (too thick)
D Oil pressure indicator faulty
D Safety valve in oil circuit faulty (does not
open)
D Oil lines/oil ducts clogged
D See "Fuels, Lubricants and Coo
lants..."
D Remedy from manufacturer ser
vice
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