Car Turbocharger is an important component to improve engine power and reduce exhaust emission. The engine cannot work properly due to improper use, maintenance and service. This paper introduces some common faults and treatment methods of turbocharger as follows:

Oil leakage:

phenomenon 1: the fuel consumption is high, but the smoke exhaust color is normal, and the power is not reduced.

cause: this situation is usually caused by oil leakage.

Treatment method:

1. First, check whether the external oil pipe of the engine lubrication system (including the oil inlet pipe and oil return pipe of the supercharger) leaks oil;

2. Check whether there is oil at the exhaust port of supercharger. If there is oil, it can be judged that the sealing ring at one end of the turbine is damaged and should be replaced.

phenomenon 2: high fuel consumption, blue smoke from exhaust, but power is not reduced

cause: due to oil leakage at the compressor end of the supercharger, the oil enters the combustion chamber through the engine intake pipe for combustion. There are several possibilities:

1. The oil return pipe of the supercharger is not unobstructed, and the oil accumulates too much at the middle support of the rotor assembly and flows into the compressor impeller along the rotor shaft.

2. After the sealing ring or oil slinger near one end of the compressor impeller is damaged, the oil enters the impeller chamber, and then enters the combustion chamber together with the indoor pressurized air through the air inlet pipe.

Treatment method:

1. Open the air outlet of the compressor or the straight air inlet pipe (rubber hose) of the engine, and check whether there is oil stuck on the nozzle and pipe wall. If yes, check whether the oil return pipe of supercharger is unblocked. If the unevenness is caused by excessive oil accumulation at the middle support, dredge the oil return pipe and reinstall it.

2. If there is no blockage, it is caused by the damage of the sealing ring or oil slinger at one end of the impeller. The supercharger needs to be removed for repair.

phenomenon 3: high fuel consumption, blue smoke or black smoke from exhaust, power reduction


1. The clearance between piston and cylinder is worn too much, and the oil runs into the combustion chamber for combustion.

2. When the air is sucked in by the supercharger, the air flow encounters great resistance. (for example, the empty filter element is blocked, the air inlet hose is deformed or equal by suction.) the low pressure at the air inlet of the compressor causes the oil to leak into the compressor and enter the combustion chamber together with the compressed air for combustion.

Treatment method:

1. Check whether there is engine oil on the straight inlet pipe wall and whether it is flattened, which blocks the air flow or the air filter element.

2. If there is oil in the nozzle and pipe wall, clean or replace the air filter element.