Black exhaust gas
Component Cause Measure
Air supply Air filter clogged Check signal ring position of contami‐
nation indicator (→ Page 206).
Fuel injection equip‐
ment
Injector faulty Replace (→ Page 183).
Injection pump defective Replace (→ Page 179).
Engine Overloaded Contact Service.
Blue exhaust gas
Component Cause Measure
Engine oil Engine oil level too high Drain engine oil (→ Page 209).
Oil separator or oil-preseparator of
crankcase breather clogged
Replace (→ Page 172).
Exhaust turbocharger
Cylinder head
Piston rings
Cylinder liner
Faulty Contact Service.
White exhaust gas
Component Cause Measure
Engine Not at operating temperature Run engine to reach operating temper‐
ature.
Fuel system Water in fuel Check fuel system at fuel prefilter
Drain fuel prefilter (→ Page 198).
Intercooler Leaking Contact Service.
MW15550/06E 2012-02 | Troubleshooting | 151
TIM-ID: 0000002547 - 002
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