How to determine a turbocharger malfunction?

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How to determine a turbocharger malfunction?

Method for diagnosing turbocharging faults:

1. Oil leakage: high oil consumption, blue or black exhaust smoke, and reduced power;

2. Metal friction sound: black smoke emitted from the exhaust pipe, reduced power, and abnormal noise from the turbocharger;

3. Bearing damage: turbocharger bearings are damaged, engine power decreases, high oil consumption emits black smoke, and in severe cases, the turbocharger cannot function.

The reasons for the failure of the turbocharger are:

1. Insufficient lubricating oil pressure and flow rate;

2. Foreign objects or sediment entering the lubrication system cause oxidation and deterioration of the engine oil;

3. There is a metal friction sound,  caused by excessive wear of the turbocharger rotor bearing or thrust bearing, and friction between the impeller and the turbocharger shell;

4. The turbocharger oil pipe is not smooth, and the oil accumulates too much at the middle support of the rotor assembly, flowing into the compressor impeller along the rotor shaft;

5. After the sealing ring near one end of the compressor impeller is damaged, oil enters the impeller chamber and then enters the combustion chamber along with the pressurized air in the chamber through the intake pipe.

How often does turbocharging replace the turbine?

Turbocharging involves replacing the turbo after driving a vehicle for about 250000 kilometers, but after driving over 100,000 kilometers, it is evident that the vehicle’s power is not as good as the new vehicle’s, possibly due to air leakage, unstable pressure, or blade damage. The turbocharger itself is a low-temperature component, but its power comes from high-temperature and high-pressure engine exhaust gas, with exhaust gas temperatures ranging from 900 to 1000 degrees Celsius. In addition, under full engine load, the speed of the turbo can reach up to 180000 to 200000 revolutions per minute, making the working environment of the turbocharger very harsh and directly affecting its lifespan.