When the vehicle reaches a certain mileage or time, the chassis suspension will cause abnormal noise due to aging and other reasons. Especially when crossing bumpy and undulating roads, the noise is more pronounced. So, what is the specific reason for the production of abnormal noise, and how should it be solved? Let's move on.
First, the ball head under the chassis of the vehicle is caused by rust and wear. Generally, there will be a rubber dust cover outside the ball head, if the dust cover is damaged and the water ingress causes the grease in the ball head to be dirty, it will aggravate the wear of the ball head, causing rust, looseness and other conditions, which will lead to bumps and noises. The solution is to replace the new ball head, of course, you can also choose to reapply the lubricating grease, but the effect is not good to replace, and there may be a risk of the ball head falling off for a long time, increasing the hidden dangers of driving. Therefore, it is recommended that all small partners should check and replace it in time if there is a problem with the vehicle.
Second, the gap between the inner and outer levers on the left and right sides of the steering machine becomes larger, and the vehicle can be lifted up and shaken by the tire during the inspection, and it can be judged that the tie rod on that side and the tie rod ball head are damaged. The solution is to replace the steering machine with a new lever and ball head.
Third, the fixing bolt of the chassis is loose, with the increase of the service life of the vehicle, the thread glue will be corroded by impurities such as rain and dust, resulting in loose screws, which in turn makes the moving clearance of the chassis parts larger and causes bumps and noises. The solution is to re-tighten the fixing bolts of the chassis suspension according to the standard torque, and for the bolts in the key component positions, the bolts need to be removed and reapplied with the thread glue before installation.
Fourth, the damage of the small balance bar leads to a bumpy noise, and the large balance bar's rubber sleeve gap becomes larger, and the activity space of the balance bar will increase after the rubber sleeve gap becomes larger, and the collision with the metal around the body will produce a knocking sound, especially on the bumpy road. The solution is to replace the balance bar and rubber sleeve with a new one.
Fifth, the vehicle shock absorber is damaged, because the hydraulic oil inside the shock absorber is reduced, and the internal oil seal is not tightly sealed, which will increase the stroke of the shock absorber, thereby losing the shock absorption effect, so there will be an abnormal noise on the bumpy road, and the solution is to replace the new shock absorber. In addition, if the flat pressure bearing on the shock absorber is damaged and broken, it will also cause a bumpy noise, which can generally be solved after replacement.
Sixth, the rubber sleeve of the upper arm and the lower arm of the chassis is caused by cracking, and the range of activity of the arm becomes larger after cracking, and when the car passes through the bumpy road, the arm will produce a metal tapping sound with the yuanbao beam, which will cause a different sound. The solution is to replace the new rubber sleeve, for models without a separate rubber sleeve, you need to replace the arm assembly.
Seventh, if the chassis of the vehicle has been scratched, it may be caused by the deformation of the original chassis, or the lower guard plate and exhaust pipe are squeezed to the side close to the engine, and when the vehicle is bumpy, it will rub with it to produce a different sound, and the solution is to correct the deformed and displaced parts.
Eighth, the limit iron plate on the brake pad is shed or deformed, if the limit iron plate falls off or the gap is too large, it will be a clattering sound when bumping, which is equivalent to the brake pad's activity space becomes larger, and it will clatter when shaking the bumpy road surface, and the solution is to replace a brake pad repair kit.
Overall, there are eight common reasons for the abnormal noise on the bumpy road surface of the car, namely the loose ball head, the large clearance of the steering machine tie rod, the loosening of the bolt, the damage of the balance lever, the oil leakage of the shock absorber, the cracking of the rubber sleeve, the scraping of the chassis and the loss of the brake pad limit iron. The above is about the bumps and noises, I hope it will be helpful to everyone.