Replacing a turbocharger is not considered a major overhaul. In the case of a major overhaul, it refers to the breakdown of the engine, such as burning engine oil or lifting the rod. If the power steering gear is broken, it can be repaired or replaced, which belongs to accessory maintenance. The engine is undergoing major repairs.

The turbocharger is damaged and cannot be repaired. If it is damaged, it can only be replaced. Turbochargers are unique to turbocharged engines, which can compress air and blow it into the engine cylinders.

A turbocharger is composed of two parts, one is a compression turbine, and the other is an exhaust turbine. The exhaust turbine is connected to the exhaust manifold, and when the engine reaches the necessary speed, the exhaust has enough energy to drive the exhaust turbine to rotate. The exhaust turbine and intake turbine are coaxial connected, and as the exhaust turbine rotates, the intake turbine also begins to rotate. After the intake turbine rotates, it can compress air and blow it into the engine cylinder.

Turbocharging technology can add the amount of air into the engine without changing the engine displacement, which can improve the engine's power. The turbocharger can rotate at speeds of over 100000 revolutions per minute during normal operation, which places a high demand on engine oil. Turbochargers need to rely on engine oil for lubrication and heat dissipation. Naturally, friends who use turbocharged engines are encouraged to add Total synthesis engine oil of good enough quality to their cars. And the engine oil also needs to be changed regularly.