1. Lube oil supply shortage or lag

(1) When the rotational speed and the engine load increases turbocharger, turbocharger lubricating oil supply amount can be increased to
Plus, because the engine high load operation, the turbocharger speed is high, even if only for a brief few seconds less than the turbocharger bearings oil will cause bearing damage.

(2) when replacing the oil and oil filter, engine oil with a clean pre-filled filter, when you first start after changing engine should be kept long enough to idle until the oil pressure is stable after engine start after acceleration, otherwise the turbocharger due to lack of lubrication of the bearing may be damaged during startup.

(3) When the engine is in an inclined state operation (full load or part-load operation), the oil level is too low or if the oil sucked into the air, it will cause the oil pressure is reduced, even a short time to make the turbocharger may also be due to lack of lubricants and damage.

2. External debris or sediment to enter the lubrication system

There booty call or sediment turbocharger oil bearing wear and damage is much more serious damage to the engine bearings, because the turbocharger speed is much higher than the speed of the diesel engine. If such damage occurs turbocharger should find the cause of the production of raw oil stolen goods and to exclude, or even put new pressure damage can occur, under development may damage the engine dealings. When mixed with large particles in the oil swag sufficient clogging inside the turbocharger oil passage, the turbocharger is damaged due to lack of lubricating oil.

When changing the oil and oil filter, in case of a conditional diesel engine oil can be extracted within the sample for analysis, which will help prevent damage to the above; should change the oil in accordance with the instructions on the use of specified replacement period filters, must not be arbitrarily extended.

3. Oil oxidation or deterioration

Diesel oxidation or deterioration of engine oil will form the deposited sludge, sludge will affect turbocharger performance and life;

When the state of the oil sludge will affect the life of severe diesel. I.e., when the rotation shaft Games turbocharger oil is flung to the housing wall, i.e., the sludge adhered to and deposited on the inner wall of the housing, when the excessive deposition of sludge and affect the turbine end bearing neck oil return, at the turbine end bearing deposit The sludge will be coming due to high temperature exhaust gas is baked into a hard coking coke spalling when the turbine will end after bearing and journal wear and seal wear will occur before leakage.

If it is found turbocharger turbine end oil leakage, you must check the turbocharger and diesel return pipe ventilation tube is blocked, and only after these troubleshooting turbocharger to work.

The formation of sludge deposition is due to oxidation and deterioration caused by diesel oil, while the root cause of oil oxidation and deterioration of the diesel engine overheating, excessive gas from passing between the piston and the cylinder wall, and entering into the diesel engine oil, coolant leak into oil, oil improper selection and duration of failing to replace the engine oil.

4. Foreign objects enter the engine air intake or exhaust system

Turbocharger turbine and compressor wheel is rotating at very high speed, once foreign objects enter the engine intake and exhaust systems will damage the impeller; small objects (such as sand) will corrode the impeller so the wind angle of the blade is changed; large hard object will cause the blade to rupture; soft objects (such as cotton) are facing the direction of rotation of the impeller blade volume.

If there are foreign objects into the impeller damage it further damaged the entire booster must be completely replaced. Typically, damage to the compressor wheel is due to air filter embedded in a metal sheet or replace the filter when the intake pipe to enter the debris, which has been sucked into the compressor caused, if not replace the filter or not to exclude the air intake duct debris, it is possible to continue to damage the new for the supercharger.

5. Operating temperature is too high

Generally, the high temperature caused by heat from the engine exhaust gases (exhaust gas), the exhaust gas temperature directly or indirectly damage the turbocharger.

Direct damage, i.e., a high temperature so that overheating of the turbocharger housing intermediate, the turbine housing and to corrosion or deformation of the material; turbine exhaust gas temperature is too high will cause shell cracking.

Indirect damage, i.e., when the exhaust gas temperature is too high, additional thermal energy in the exhaust gas turbocharger will accelerate the rotor assembly, and working under conditions of higher than the design speed, if this occurs, since the compressor impeller load is applied once or repeated high stress cracking of the turbine wheel because the material will also decrease the strength of the turbine speed and the progress in the high temperature cracking.

Exhaust gas temperature rise may cause are: engine air-fuel ratio is wrong, engine timing have questions, throttled exhaust, exhaust gas oxygen sensor and the subject, or other control system of the engine has a problem and so on.