Mitsubishi SL-Series Operation Manual page 42

TROUBLESHOOTING
Problem
Overheating
Too much white or blue
smoke
Too much black or gray
smoke
Fuel consumption too
high
Table 12 Troubleshooting
42 / 44
Cause
Not enough coolant in system
Leaks in cooling system
Loose fan belt
Restriction to air flow through radiator
Defective water pump
Defective thermostat
Defective fan
High LLC concentration
Too much oil in engine
Oil viscosity too low
Defective thermostat (coolant temperature too
low)
Defective fuel injection nozzles
Wrong injection timing
Wrong fuel cetane number
Poor compression (cylinders, piston rings, etc.
worn)
Bad quality fuel
Defective fuel injection pump
Defective fuel injection nozzles
Wrong injection timing
Clogged air cleaner
Wrong valve clearance
Poor compression (cylinders, piston rings, etc.
worn)
Bad quality fuel
Defective fuel injection pump
Defective fuel injection nozzles
Wrong injection timing
Clogged air cleaner
Poor compression (cylinders, piston rings, etc.
worn)
Add coolant
Retighten or repair
Adjust
Remove restrictions
Replace
Replace
Replace
Adjust LLC concentration
Drain to correct level
Change oil
Replace
Repair or replace*
Adjust*
Change fuel
Repair or replace*
Change fuel
Repair or replace*
Repair or replace*
Adjust*
Clean or replace
Adjust
Repair or replace*
Change fuel
Repair or replace*
Repair or replace*
Adjust*
Clean or replace
Repair or replace*
ENGLISH Operation Manual Mitsubishi SL-Series diesel engines
Correction
Version 08/2004