What Causes Abnormal Noise in the Engine When Turning on the Car Air Conditioner?

[StJameson]

Engine abnormal noise can be caused by engine misfiring, improper use of engine oil, timing belt noise, insufficient car warm-up time, and other factors. Below is relevant information about the engine: Relatively small friction torque: The engine valve drive mechanism adopts a hydraulic support roller rocker arm structure. Compared with the hydraulic tappet valve drive mechanism commonly used in modern gasoline engines, this innovative valve drive mechanism has the advantage of relatively smaller friction torque. Reduced camshaft weight: The use of a heat-shrink camshaft, compared to the original camshaft, not only reduces the weight of the camshaft but also allows the engine to achieve higher camshaft profile accuracy and more precise valve timing.