What happens when there is an abnormal sound on the chassis of the car?

Check whether the connection between the chassis parts is tight, when the chassis bolts and screws are loose, the bolts and nuts should be tightened or replaced in time, and if you need to drive often on bumpy roads, then you can check the chassis fasteners regularly.

Check the drive shaft and universal joint for deformation or oil leakage. If there is deformation of the transmission shaft and universal joint, it needs to be replaced in time, if it is only a lack of oil, it needs to be relubricated, and if necessary, the oil seal should be replaced, check whether the brake caliper and brake disc bracket are loose, and check whether the brake pads are abnormally worn.

Hello! Glad for your question.

Loose chassis generally occurs in older cars, when the car is driving in bad road conditions, the steering wheel will feel unstable, the bottom of the car will also come out of the abnormal sound, usually the old driver can feel the overall a little loose, when encountering such a situation, it means that the chassis may be loose, and the reasons for this situation are divided into several, only by understanding the reasons, can we better prevent this problem from happening.

The first reason is the aging of rubber parts, we all know that the elasticity of rubber is particularly good, which can buffer the friction between parts and reduce noise at the same time. However, this kind of thing has a lifespan, and it will age after a long time, and the elasticity is not as good as before, so the buffering capacity will decrease, resulting in abnormal noise in each part, so it is necessary to check these rubber parts regularly and replace them in time.

The second possibility is the reason for the shock absorber, the main role of this part is to inhibit **, when the car is driving in the dustpan section, it will have an impact with the road surface, and the shock absorber can well ensure the smoothness of the car, if the shock absorber is damaged, there will be a scoop phenomenon, so that the chassis is loose, so usually check the shock absorber, if there is a leakage to repair in time.

The third is the clearance of the parts, that is to say, the ball head may be loose, this part is like the joint of the human body, if the ball head is loose, there will be a large gap between the lever and other connected parts, if the gap is too large, when crossing some dustpan roads, the screws between the subframe and the suspension will be loose, then the chassis will become loose, so usually check these two parts. Thank you.

1. Constant velocity universal joint abnormal sound: Constant velocity universal joint is commonly known as ball cage, and its main function is to transmit power and complete steering. If the constant velocity universal joint is seriously worn, and the vehicle turns while driving, there is an abnormal sound similar to "rattle and rattle", you only need to confirm which side the abnormal noise is, and then replace the constant velocity universal joint to solve it.

2. Abnormal sound of wheel bearing: The function of wheel bearing is to connect the vehicle and the tire. No matter how big the tire is, the connection between the vehicle and the tire is by a small wheel bearing, if the wheel bearing is damaged, it will cause the tire to deviate, or even the tire to fall off.

When the vehicle is driving, it emits a continuous abnormal sound similar to "buzzing", which is the alarm of the wheel bearing, and the faster the speed, the stronger the sound, if it is slightly damaged, there will be an abnormal sound when the direction is generally tapped.

3. Abnormal sound of exhaust pipe: abnormal sound of exhaust pipe is generally caused by rupture or leakage of exhaust pipe, and there will be "poof" noise after the vehicle starts. It may also be caused by the damage or blockage of the three-way catalytic converter, which is used to reduce the noise while purifying the exhaust gas.

The above is the introduction of the abnormal sound of the car chassis, I hope it will help you.

Second, if this happens, I personally think it may be that there will be a gap or a loosening in the place, so pay attention to check it.

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The rubber bushings on the chassis showed deterioration.

The abnormal sound of the chassis of the car is due to the aging of the rubber bushing on the chassis.

1. It is the link between the MacPherson suspension and the shock absorber. You can park the car in a relatively quiet place and turn off the engine, press the four shock absorbers with both hands, and press the body up and down to make the body shake up and down.

2. If it is not the sound of the tire rubbing against the ground, it can only be the sound caused by the damage of the outer cage. Replace the outer cage to eliminate squeaky noises. If it is the sound of the tires rubbing against the ground, it is recommended to do a wheel alignment.

Detailed rules for the maintenance of automobile chassis.

1. In winter, if the chassis is to be maintained, the chassis should be thoroughly cleaned and anti-rust. First of all, the chassis should be thoroughly cleaned, if there is too much mud on the chassis, it should be washed with a detergent to remove oil stains, so that the chassis can reveal its original "true color", so that the anti-rust potato care can begin. In a professional beauty shop, the car can be lifted onto the lifting frame for chassis cleaning, wiping, and rust prevention.

2. After cleaning, you must wait until the moisture on the chassis is dry before you can carry out anti-rust care. When applying care, it is important to maintain an even spray coating to create a uniform anti-rust coating that will last for a long time. After all the work is completed, it will be dried for 5-10 minutes to prevent rust from rust on the chassis.

If there is no abnormal sound in the clutch engagement, but there is an abnormal sound after pressing the clutch pedal, it may be that the front bearing of the first shaft is damaged. The reason is that when the clutch is engaged, the first shaft rotates with the flywheel, and the front bearing of the first shaft has no relative motion, so there is no abnormal sound or the abnormal sound is not obvious; When the clutch is disengaged, the first shaft is separated from the flywheel, and the inner and outer rings of the front bearing of the first shaft are opposite.