SECTION 10 - ENGINE
10-102
DIRTY EXHAUST SMOKE
POSSIBLE CAUSE CORRECTION
Not enough intake air A clogged element in the air cleaner, clean or
replace element
Closed air intake inlet, open inlet
Air leakage from a connection, check and repair
The turbocharger is not running Gum or sludge formation in the turbine-side seal,
causing the turbine to resist turning, Check the oil
quality and change
Disassemble and clean
Seized bearings, disassemble and clean
Disassemble and repair
Oil temperature too high, change engine oil
Dynamic imbalance in the rotor, clean and/or
replace rotor parts
Turbine wheel or blower wheel rubbing or broken,
disassemble and repair(remove foreign matter, if
any, and check air cleaner and engine to locate the
cause).
Not enough gas pressure Gas leakage through a connection on upstream side
of turbine, check and repair
A large constriction in the exhaust line, due to
distorted gas passages, check and repair
WHITE EXHAUST SMOKE
POSSIBLE CAUSE CORRECTION
Oil return pipe is clogged or distorted, causing the
lube oil to leak into turbine and blower
Repair or replace the pipe
Seal rings are abnormally worn or broken due to
worn-down bearings
Disassemble and repair
ABNORMALLY HIGH OIL CONSUMPTION
POSSIBLE CAUSE CORRECTION
Seal rings are abnormally worn or broken due to
worn-down bearings
Disassemble and repair
ENGINE LACKS OUTPUT POWER
POSSIBLE CAUSE CORRECTION
Gas leakage in the exhaust line Check and repair
Air leakage in the blower outlet side, resulting in
reduced boost pressure
Check and repair
A clogged element in the air cleaner Clean or replace
The turbocharger is internally fouled with foreign
matter or its running parts are damaged
Disassemble and repair or replace damaged parts
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