Fault table
11
1. Starter turns over engine only slowly or not at all
2 Starter motor turns engine, engine does not start
3. Engine does not start while cold
4. Engine does not run smoothly, and stops
5. Speed fluctuations during operation
6. Slow, periodic fluctuation of speed (approx. 0.5−1 Hz)
7. Quick periodic fluctuation of speed (approx. 8−12 Hz)
8. Engine cannot be switched off
9. Performance unsatisfactory
10. Coolant temperature too high, coolant loss
11. Lubricating oil pressure varies / too low
12. Lubricating oil consumption too high
13. Fuel consumption too high
14. Black smoke
15. Blue smoke
16. White smoke
17. Engine knocks
Possible causes
x x Turbocharger contaminated or defective
x x Turbocharger wear
x Coolant level too low
x Proportion of anti-freeze / anticorrosion agent too high, see “Fuels, lubricants...”
x Cap with working valves on expansion tank defective, leaky
x Thermostat in closed position blocked
x Radiator heavily contaminated
x V-belt for water pump drive not correctly tensioned (slipping)
x Water pump leaky, defective (bearing damage)
x Coolant circuit clogged by foreign matter
x Temperature indicator defective
x x Oil viscosity unsuitable (viscosity too high), see “Fuels, Lubricants...”
x Oil viscosity unsuitable (viscosity too low), see “Fuels, Lubricants...”
x Lubricating oil quality does not satisfy regulations, see “Fuels, Lubricants...”
x Oil level in oil pan too low
x Oil level in oil pan too high
x Automatic oil refill system incorrectly adjusted
x Max. inclination exceeded
x Oil pump gears heavily worn
x Safety valve in oil circuit defective (does not shut, spring fatigued or broken)
x Safety valve in oil circuit defective (does not open)
x Oil pressure gauge defective
x x x Engine in cold running phase
x Leaks in lubricating oil circuit, particularly at turbocharger and oil cooler
x x Piston rings heavily worn
x Heavy bearing wear
x x Valve guides heavily worn
x Crankcase breather clogged (excess pressure in the crankcase)
x Cylinder head gasket leaky / burned through
x Crank gear blocked
x Mainly low-load operation
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