Black exhaust gas.
Cause
Corrective action
Overload.
u
Reduce load.
Air filter clogged.
1. Check signal ring position of service indicator (→ Page 177).
2. Replace air filter (→ Page 175).
Injector defective.
u
Blue exhaust gas
Cause
Corrective action
Too much engine oil in the engine.
u
Drain engine oil (→ Page 181).
Oil separator of crankcase
breather contaminated.
u
Replace oil separator (→ Page 141).
Exhaust turbocharger defective.
u
Replace (→ Instructions for Exchange of Sub-assemblies).
Cylinder head defective.
1. Check cylinder compression.
2. Replace cylinder head (→ Instructions for Exchange of Sub-
assemblies).
Piston rings or cylinder liner
defective.
1. Check cylinder compression.
2. Carry out endoscopic examination of cylinder liner (→ Page 137).
3. Replace piston rings (→ Instructions for Exchange of Sub-
assemblies).
4. Replace cylinder liner (→ Instructions for Exchange of Sub-
assemblies).
5. Contact Service.
White exhaust gas
Cause
Corrective action
Engine is not at operating
temperature.
u
Run engine to reach operating temperature.
Intercooler leaky.
1. Check condensate drain for coolant discharge and obstruction
2. Replace intercooler (→ Instructions for Exchange of Sub-
assemblies).
96 | Troubleshooting | MS150046/03E 2018-08
TIM-ID: 0000044073 - 004
Summary of Contents for 20V4000M73 series
Page 1: ...Operating Instructions Diesel engine 20V4000M73x MS150046 03E...
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