The car engine is too noisy. How to fix it?

Fire-proof and sound-proof walls can be installed in the engine compartment, and thermal insulation and sound-proof cotton can be installed in the engine hood; Of course, the most important thing is to reduce the noise of the engine itself and remove the carbon deposit of the engine, as well as the carbon deposit of the air intake, throttle valve, spark plug and fuel nozzle. Another key point is that replacing high-performance engine oil with semi-synthetic or all-synthetic engine oil can reduce the consumption and noise of the engine itself; Then adjust the idle speed to the optimum speed, the noise will be less, the EFI will not need to be adjusted, and the computer just needs to be reset. ?

Automobile noise is usually caused by the engine. After all, the engine will shake when running, which will lead to noise in the future. Therefore, we can install sound insulation materials around the engine to absorb the noise generated by the engine, which will naturally reduce the spread of noise. However, when installing sound insulation materials, don't ignore the heat dissipation of the engine. ?

Some cars make little noise, but long-term use will make more noise. This is mainly because the sealing strip has lost its original function. At this time, the door sealing strip can be replaced to restore the sound insulation effect of the car. When choosing a sealing strip, you must choose a sealing strip with good elasticity, good elasticity and good sound insulation effect. ?

If the sealing strip can't solve the problem, install soundproof cotton on the car. In fact, many parts of the car have soundproof cotton to block noise. However, due to the consideration of the manufacturing cost of the whole vehicle, the automobile company did not install sound insulation cotton on all parts. Therefore, if the owner is willing to spend money, he can add sound insulation cotton to the whole car, which can minimize the impact of noise. Friction between automobile tires and the ground will produce noise, and different tires will produce different noises, so we can replace quieter tires and fundamentally solve the tire noise problem. If you don't want to spend so much money to change tires, you can do sound insulation on the fender, which can also play a certain role.