Mitsubishi S12R - Exhaust Smoke is Black or Dark Grey

11 TROUBLESHOOTING
Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL
184
Pub. No. 291Y1-40720 Revision: 5
Exhaust Smoke is White or Blue
Table 11-5 Exhaust Smoke is White or Blue
Problem Cause Remedies Reference
Page
Exhaust Smoke is
White or Blue
Fuel System Improper fuel prop-
erties
• Check cetane index. 106
• Change with appropriate fuel. 103
Faulty fuel injection
timing
• Check fuel injection pump drive
coupling.
-
• Contact your MHIET dealer. 10
Uneven fuel injec-
tion volume
• Check ignition sound, exhaust
temperature and the balance
between left and right banks.
-
• Contact your MHIET dealer. 10
Fuel injection noz-
zle malfunction
• Contact your MHIET dealer. 10
Lubrication
System
Combustion of en-
gine oil
• Engine Oil Level - Check
• Check lubrication system.
149
• Contact your MHIET dealer. 10
Cooling System Overcooling • Check heat exchanger.
• Check control system.
• Thermostat - Check
-
• Contact your MHIET dealer. 10
Engine Body Faulty valve timing • Contact your MHIET dealer. 10
Compression pres-
sure drop
Additional
Equipment
Water heater
switch "OFF"
• Check water heater switch. -