Why does replacing the hood at a 4S shop require painting?
1 Answers
Because the new replacement part does not come with paint, it needs to be painted. The hood is made of rubber foam and aluminum foil materials, which not only reduce engine noise but also isolate the heat generated during engine operation, effectively protecting the paint surface on the hood and preventing aging. Below are the functions of the hood: 1. Airflow guidance: For objects moving at high speed in the air, the air resistance and turbulence generated around the moving object directly affect its trajectory and speed. The shape of the hood can effectively adjust the direction of air flow relative to the car's movement and the resistance force, reducing the impact of airflow on the car. Through guidance, air resistance can be decomposed into beneficial forces, increasing the grip of the front tires on the ground, which enhances the car's driving stability. The streamlined appearance of the hood is primarily designed based on this principle. 2. Protection for the engine and surrounding pipeline components: Under the hood are critical components of the car, including the engine, electrical circuits, oil circuits, braking system, and transmission system, all of which are vital to the vehicle. By enhancing the strength and structure of the hood, it can effectively prevent adverse effects such as impacts, corrosion, rain, and electrical interference, ensuring the normal operation of the vehicle. 3. Aesthetics: The exterior design of a vehicle is a direct reflection of its value. As an important part of the overall appearance, the hood plays a crucial role in enhancing visual appeal and embodying the concept of the entire car.
