What is the sound of a car making a scraping noise?
1 Answers
If a car has a scraping noise, it is the sound produced by the engine oil. The cause may be related to the oil, such as the use of inferior oil, failure to change the oil for a long time, or insufficient oil. These conditions can easily increase friction between the valves and guides, as well as in hydraulic lifters, making various sounds inside the engine louder. Introduction: Engine oil, also known as engine lubricating oil, with the English name: Engine-oil. It has a density of approximately 0.91×10³ (kg/m³) and serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. It is known as the 'blood' of a car. Composition: Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil, imparting certain new properties. Additives are an important part of lubricating oil.