5 Parts That Cause Abnormal Noise in the Chassis of the Car


Abnormal sound, carbon deposit, oil leakage, and oil burning are the most common problems in automobiles. Carbon deposits are basically unavoidable. What we can do is to use good driving habits to reduce the occurrence of carbon deposits and to clean the carbon deposits regularly; Because the cars will face the rubber seals aging, the oil seals will age or break. It will lead to oil leakage, so oil leakage is also a high probability event for an old car. In addition,  worn cylinders and piston ring, design and assembly defects, valve oil seal aging or damage, will cause oil burning. The abnormal sound may cause abnormal noise in the engine, gearbox, chassis, and even the central control panel.

The chassis also needs to be maintained, otherwise the possibility of abnormal noise is still very large. So what are the five parts that cause abnormal noise?

  1. Aging engine mounts

The engine mount is the engine bracket, which is the place where the engine is connected to the body. The rubber parts also have the functions of shock absorption and noise reduction. Once the engine mount is hardened or broken, it is easy to feel the strong vibration of the chassis. And abnormal sound, we should also pay attention to check whether the machine foot rubber is aging or damaged.If there is signs of aging, it needs to be replaced.

Absorb vibration from the engine and keep the cockpit a peaceful and comfortable environment. AA-TOP engine mounts are produced by the world advanced equipment and high-quality, environmentally friendly materials. In addition to ensure the design same as original, our quality is comparable to the genuine parts.

Engine mounts are composed of rubber and steel with two functions. First, it fixes the engine and transmission to the frame of the car. Second, it absorbs the road-shocks and engine vibrations to make the driver not feel any engine swing. Transmission mounts fixed the same function od the transmission. All rubber in AA-TOP engine mounts will be made into specific measurements and durometer according to the application requirements of various vehicles with good tensile strength, tear strength, abrasion-resistance and aging-resistance to ensure performance and life span.

The transmission mounts and the engine foot rubber controls torque together and minimize the vibrations transmitted to the chassis. It also keeps linkages in their proper positions. Reaction Rod&Bracket Assy includes brackets and mounts, its functions can be used as a dynamic vibration absorber to suppress vibration and noises of the engine.

  1. The brake pads lack of maintenance

The brake system, like the tires, is of great importance to the safety of the car. As a lossy part, the brake pad needs to be inspected and replaced regularly. If the brake pad is unevenly worn due to failure, or the wear is too large, the chassis will have a sharp and continuous brake noise. As the mileage of the car increases, the brake pads will wear more and more thin. 2mm is the limit of the thickness of the brake pads. When the thickness of the brake pads is less than 3mm, it needs to be replaced. No change will affect the noise. To the braking effect, there is a safety hazard. Therefore, for safety, the brake pads should be replaced in advance if it is worn.

  1. Aging brake disc

The brake pads are easy to break down, and the brake discs that are in contact with the brake pads can not escape the fate of wear. The brake discs needed to be changed if the brake pads are replaced twice, which means that a pair of brake discs can only undergo twice changes of brake pads, but this is only experience. Under normal circumstances, it is no problem to use the brake disc for more than 100,000 km (except for the big-foot brake), but it is necessary to carefully check the wear of the brake disc when it’s more than 60,000 km. Abrasive noise can also occur when the brake disc is excessively worn. If the chassis has abnormal noise, especially when it occurs on the brakes, it should be given enough attention.

  1. Exhaust pipe is a common place for chassis noise

If the exhaust pipe is not firmly fixed, it is easy to generate resonance when the car is running, which is one of the sources of large abnormal noise. If the bolts on the heat insulating sheet of the exhaust pipe are loose or fall off, and the effect is particularly obvious when the road is uneven. Originally, the exhaust pipe also acts as a muffler, but the noise reduction effect will be worse if it’s worn.

  1. the ball head rupture

There are many ball heads in the chassis, such as the hem arm ball head, anti-roll bar ball head, directional tie rod ball head, semi-axis ball head, etc. The ball head has a dust jacket seal, which is lubricated with lubricating grease. However, the rubber dust jacket is also prone to aging or damage. Once damaged, the oil will leak and sand and dust will enter, causing the chassis ball  abnormal noise. This requires us to check regularly and maintain it regularly. Do not damage it and cause the ball to be damaged.

Indeed AA-TOP engine mounts and other chassis part with supreme natural rubber and strict r&d team can ensure high quality driving. As a professional manufacturer, AA-TOP can offer more detailed solutions.