Is It Normal for a Car Engine to Have Noise?
2 Answers
It is normal for a car engine to have slight noise. Here is a detailed introduction about car engines: 1. Overview: A car engine is a device that provides power to the car, determining its power performance, fuel economy, stability, and environmental friendliness. Depending on the power source, car engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrids. 2. Others: Common gasoline and diesel engines are both types of reciprocating piston internal combustion engines, capable of converting the chemical energy of fuel into the mechanical energy of piston motion and outputting power. Gasoline engines have high rotational speeds, are lightweight, produce less noise, are easy to start, and have low manufacturing costs. Diesel engines have a high compression ratio, high thermal efficiency, and better economic performance and emission performance than gasoline engines.
Having driven for over a decade, I've learned that some engine noises are perfectly normal. The ticking sound during cold starts is just the hydraulic lifters building oil pressure; don't panic when the fan suddenly roars at idle—it's just cooling doing its job. However, be alert for metallic scraping hisses (potential belt issues) or jingling sounds like shaking keys (check for loose parts in the engine bay). If an older car rattles during acceleration, it's likely knocking—time for higher-octane fuel. Last week, a neighbor's car developed a whistle-like shriek—turned out to be a leaking turbocharger hose. The key is distinguishing between rhythmic and sudden noises—address the latter immediately.
