What causes abnormal noise in a car engine?
2 Answers
Engine abnormal noise can be caused by engine misfire, improper use of engine oil, timing belt noise, insufficient car warm-up time, etc. The following is an introduction to 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 current gasoline engines, this novel valve drive mechanism has the advantage of relatively small friction torque. Reduced camshaft weight: The use of a hot-sleeve camshaft not only reduces the weight of the camshaft compared to the original one, but also enables the engine to achieve higher cam profile accuracy and more precise valve timing.
Last week, I heard a strange noise coming from my car's engine, like something was rubbing, and it worried me to death. It could be a loose belt or worn-out parts, such as a water pump or bearing failing, making a squeaking sound; or it might be due to insufficient or dirty engine oil, causing metal friction from poor lubrication. Another possibility is carbon buildup or leaks in the valves or intake pipes, resulting in a tapping noise. I immediately went to the repair shop, and the mechanic said these minor issues could damage the engine if left unattended, potentially leading to costly repairs worth thousands if they worsen. I believe safety comes first—don’t skimp on maintenance. Regularly changing the oil and inspecting belts is crucial, especially for older cars, and a pre-highway check is a must. Even if the noise seems minor, the underlying risk could be significant—don’t take chances. In short, if you hear unusual noises, get your car checked by professionals right away—don’t delay.
