White Smoke; Excessive Oil Consumption; Reduced Engine Power; Poor Follow-Up Of The Turbocharger - Yanmar 6LY3 series Service Manual

TURBOCHARGER

White Smoke

Possible Cause
Oil flows into the compressor side or turbine side because of a
clogged or deformed oil return line.
The seal ring is worn abnormally or is broken because of
excessive bearing abrasion.

Excessive Oil Consumption

Possible Cause
The seal ring is worn abnormally or is broken because of
excessive bearing abrasion.

Reduced Engine Power

Possible Cause
Gas leak in the exhaust gas system.
Air leaks at the discharge side of the compressor.
Clogging of the air cleaner element.
Turbocharger is contaminated or damaged.

Poor Follow-Up of the Turbocharger

Possible Cause
Carbon deposits stuck on the turbine side (seal ring) hampers
smooth rotation of the turbine rotor shaft.
Incomplete diesel fuel combustion.
9-24
Repair or replace the pipe.
Disassemble and repair the turbocharger.
Disassemble and repair the turbocharger.
Disassemble and repair exhaust system.
Repair leak.
Clean or replace the element.
Disassemble and repair or replace the turbocharger.
Change the engine oil and, at the same time, disassemble and
clean the turbocharger.
Check the engine combustion system and restore its
combustion state.
© 2007 Yanmar Marine International
Troubleshooting the Turbocharger
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6LY3 Service Manual