Why is there a hissing sound from the engine?

[StLandon]

Engine hissing sounds may be caused by engine overheating, requiring inspection of the cooling system, or due to exhaust system blockage or vacuum tube leakage. Introduction to the engine: 1. The role of the engine is to provide power for the car, serving as the heart of the vehicle, determining its power, fuel efficiency, stability, and environmental friendliness. Depending on the power source, car engines can be classified into diesel engines, gasoline engines, electric vehicle motors, and hybrid engines. 2. An engine is a machine capable of converting other forms of energy into mechanical energy. It can refer to both the power-generating device and the entire machine including the power unit. Types include internal combustion engines, external combustion engines, electric motors, etc.