What is the problem when the car makes abnormal noises?

[DelRemington]

Sometimes it is caused by excessive clearance between the hydraulic tappets and valves inside the engine cylinder head. Automobile Engine: The automobile engine is the device that provides power for the car, serving as the heart of the vehicle, determining its power, fuel efficiency, stability, and environmental performance. Depending on the power source, automobile engines can be categorized into diesel engines, gasoline engines, electric vehicle motors, and hybrid engines, among others. Working Principle: A four-stroke gasoline engine mixes air and gasoline in a certain proportion to form a good combustible mixture. During the intake stroke, the mixture is drawn into the cylinder. The compressed mixture is ignited and burned to generate thermal energy. The high-temperature and high-pressure gases act on the top of the piston, driving the piston to perform reciprocating linear motion, which then outputs mechanical energy externally through the connecting rod, crankshaft, and flywheel mechanism. A four-stroke gasoline engine completes one working cycle during the intake stroke, compression stroke, power stroke, and exhaust stroke.