Maintenance of Major Components
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5.5.5. Walk-around check and servicing
As the condition of turbocharger depends greatly on how well the engine is serviced, it is very important
to maintain the engine in accordance with the specified maintenance procedure.
1) Intake system
Pay particular attention to the air cleaner when servicing the intake system.
In the case of wet-type air cleaner, if the level of oil surface is lower than specified, cleaning effect is
poor; if too high, the cleaner draws in oil to foul the case.
Especially, if the rotor is fouled, the sophisticatedly-tuned balance is broken to create vibration and to
cause seizure and unusual wear to the bearing.
Therefore, it is very important to use a good quality air cleaner all the time.
In the case of dry-type air cleaner, it is essential to clean it to reduce intake resistance as much as
possible.
2) Exhaust system
Pay particular attention to prevent gas leaks and seizure when servicing the exhaust system
because leakage of exhaust gas from discharge pipes, turbocharger fixing portions, etc. lowers
charging effect.
As such components as turbine chamber that becomes red-hot during operation use heat resisting
steel nuts, do not interchange these nuts with ordinary steel nuts. In addition, apply anti-seizure
coating to fixing nuts on the portions as designated.
3) Lubricating system
Pay particular attention to oil quality and oil filter change intervals when servicing the lubricating
system.
Deteriorated engine oil affects adversely not only the engine but torso the turbocharger.
Suggested engine oils for the turbocharger-mounted engine are as follows:
* Recommend oil : TOTAL LMG-405
Mobil Delvac super GEO 15W40
Engine model
Recommended oil
Sulfated ash
content
SAE No.
GL08K
SAE 15W40 Bellow 0.5 %
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