It is not groundless to say that a turbocharged car will damage the turbocharger if it is turned off and stopped, but it is not absolute. Here is a brief analysis of the reason for the origin of this statement.
1. The rotor speed of the turbocharger is as high as 120,000 to 160,000 rpm. If the engine rotates at a high speed before the car is stopped, after the engine stops, the oil pump and the coolant pump stop rotating, but the turbocharger will continue due to inertia. During high-speed operation for a period of time, the oil in the supercharger cannot take out the heat generated, and the bearing will overheat, which will damage the supercharger bearing to a certain extent. Even at high temperature, the oil will form carbon deposits and block the oil holes. Further damage to the bearing.
2. Now many advanced turbocharged engines will have delay protection after shutting down the engine, so that the engine does not need to wait a few minutes before shutting down the engine.
3. All in all, if you are not sure and whether the car has a supercharger delay protection device, then wait patiently for a few minutes, after all, once the supercharger is damaged, it will be a big expense.