There are many people who own cars. They are shy when buying new cars. They can also choose to buy second-hand cars. But how can we deal with the noise problem of second-hand cars! Pneumatic ball valve or a good choice! I will analyze the cause of noise for you!
Exhaust pipe noise: it belongs to the category of normal aging. For the exhaust pipe with a length of 10 years or 200000 km or so, the noise at the rear of the car body will be increased because the bottom of the car body is often exposed to acid and alkali mixture such as mud and water, or there is the possibility of air leakage due to corrosion, which can generally be heard clearly. The solution is to replace the whole or part of the exhaust pipe, and the noise can be eliminated immediately.
Noise of engine and its accessories: This is caused by normal wear of internal components of the engine due to age. If there have been abnormal accidents in the past, such as oil leakage without being detected in time or antifreeze leakage. The engine with such experience will be more noisy, and the noise level will vary depending on the size of the accident. The solution is to replace some or all of the engine moving parts, such as connecting rod, connecting rod bush, piston and piston ring. It is also caused by improper installation or wear of accessories such as some belts outside the engine.
Brake system noise: if the brake pads are used continuously after normal wear, the brake shoes are easy to rub the brake disc (that is, the iron collides with the iron), and a very harsh squeal will appear when braking. The solution is to replace the brake pads (if the brake disc is worn, it should also be replaced).
Noise of suspension system: although it belongs to normal aging, different users will have different results. A large part is caused by the wear of hub bearings or the reduction of the damping capacity of valve fluid in pneumatic ball valves. There are also many examples of valve fluid leakage. Because the valve performance of the car is achieved by valve fluid and ball valve together, the loss of valve fluid capacity will significantly increase the noise. The solution is to go to the car shop for repair and replace the hub bearing or pneumatic ball valve.