What is the cause of abnormal noise in the chassis of the car, and what is the reason for the abnorm

Chassis squeak is caused by the aging of the rubber parts of the chassis, or the gap between the chassis parts becomes larger after a long period of driving.

Some cars that have been driven for a few years will have a little abnormal noise from the chassis, which is normal. The chassis has transmission parts, suspension, shock absorbers, etc.

The transmission part is prone to abnormal noise, such as half-shaft ball cage, rear-wheel drive** drive shaft, differential, etc. Most of the causes of abnormal noise of transmission components are due to excessive wear due to large gaps or lack of lubrication. The solution is to replace the transmission parts, or disassemble the transmission parts and add grease.

Some rear-wheel drive vehicles require a change of differential oil for the rear differential. If the oil is not changed for a long time, the gears in the differential will wear abnormally, causing slack and abnormal noise.

The suspension is also one of the most unusual noises. There will be unusual noises between the suspension linkages and between the suspension linkages and the subframe. There are rubber bushings between the suspension linkage and the suspension link and the subframe.

These rubber bushings are designed to provide better comfort and quietness. Over time, the rubber will age and harden, and it will produce abnormal noise when passing through some potholes. The solution is to replace all the aging rubber bushings.

The rubber bushing is very cheap, but it takes a lot of man-hours to do this work, so the replacement cost is still relatively high.

Long-term use of shock absorbers can also produce abnormal noise. There is a layer of top rubber where the shock absorber is connected to the body, which will age and harden over time, causing the body to creak when passing some potholes. And after the top rubber ages, when you walk on some roads with a lot of small bumps, you can feel that the car's tires are shaking very badly and there are a lot of aftershocks.

This is because the stiff top rubber does not cushion these tiny vibrations. The solution is to replace the shock absorber top glue.

If all of the above are replaced, it can not only completely solve the problem of abnormal noise of the chassis, but also restore the texture of the chassis to the texture of the new car. The chassis of the vehicle has a lot of rubber parts, which are not maintenance-free and need to be replaced after a long period of use.

Hello landlord, this kind of abnormal noise problem to test the car to see, if there was no before, it is recommended that you drive to the 4S shop to let the master test the car.

First of all, let's talk about the problem of abnormal chassis noise, this situation is a problem that many car owners often encounter, the chassis is loose and abnormal noise is still caused by many factors, the quality of the car itself, or the accident car, or the car environment, these factors are possible, the distorted energy will be absorbed by the deformation of the entire frame chassis, and it is easy to understand the abnormal sound of the chassis when the car is driving, it can be said that such a problem is relatively common in the car used all year round! Generally speaking, those cars without shock absorbing springs, when driving in potholes, the bumps of the car are still relatively strong, and the passengers sitting in the car will produce serious shaking and discomfort, the most seriously injured is the chassis of our car, this problem is the old driver with good technology in two or three hundred meters to observe, may be overwhelmed for novices, so in order to avoid the occurrence of problems, we must check in time to understand the causes of these problems, so as to better avoid.

1. The tire is faulty 2. The braking system cannot be ignored 3. The wheel bearing "buzzes" 4. The drive half shaft "rattles".

5. Bushings and liners are annoying.

1. Abnormal sound of disc brakes.

Features: When the vehicle is driving at a low speed on a flat road, it makes an intermittent and irregular "rattling" sound on the axle.

Reason: This is due to the damage, deformation and falling off of the brake shoe support plate, vibration damping spring plate or guide plate of the disc brake, which increases the gap between the brake shoe and the brake caliper support frame, and makes a sound when it hits each other. You can go to the repair station to repair the deformed parts and replace the parts that have fallen off.

Second, the front suspension ball head abnormal sound.

Features: When the vehicle is driving on the undulating road surface in a low-speed gear, the front axle part emits an uninterrupted "click" sound, the worse the road quality, the louder the sound, and the sound intensifies with the increase of speed.

Reason: The gap between the ball head and the ball head seat becomes larger, and the looseness is severe. Because the ball head seat is a sealed structure and cannot be removed, it can only be replaced at the repair station in this case.

Three. Abnormal noise of the front wheel shock absorber.

Features: On flat roads, you can hear the "cooing" of the front of the vehicle, which is intensified when turning sharp corners.

Cause: Vehicles are often driven on bad roads and are not properly maintained, resulting in oil leakage and damage to shock absorbers. Depending on the severity of the damage, it will need to be repaired or replaced.

Fourth, the transmission shaft universal joint abnormal sound.

Features: If the front drive constant velocity joint is faulty, in the vehicle in motion, especially when cornering or accelerating sharply.

Reason: The abnormal sound of the constant velocity gimbal is due to the excessive clearance of the gimbal or the issuance of cards. The main reason for the abnormal sound of the universal cross shaft is that there is no lubrication device or the maintenance is not timely. In this case, you should go to the workshop to apply grease or repair.

What is the abnormal noise of the car chassis.

Hello, check the ball heads of the chassis and whether the ball heads of each tie rod have oil leakage or cracking, and replace them directly.

The chassis of the car always rings, and you can see that the accelerator of the car is out of the problem, and this is the main reason.

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.

What is the fault analysis of automobile chassis abnormal noise, there are many reasons for abnormal noise of automobile chassis, such as balance bar rubber sleeve, wheel bearing abnormal noise, damping spring, brake pad deformation, damping pressure bearing aging or abnormal wear, opening excavation, suspension and shock absorber connection, etc. , all of which can lead to abnormal noise from the chassis of the car. Because I can't see the real car, I don't know what caused it, so I can't analyze it.

It is recommended to go to a 4S shop or a professional auto repair shop and let the technician check it to determine what the problem is before repairing it. Here are some common failures to analyze. 1.

Abnormal sounds caused by resonance. In general, squeak and rattle are caused by the resonance of the engine guard and the bottom grip hall disc. The resonance of the chassis is generally easily observed.

Resonance is not always present, it usually occurs in a certain rev range of the engine. 2.There is a problem with the rubber sleeve of the flat nuclear balance bar.

Phenomenon: When the vehicle passes through uneven road surface, the chassis will make abnormal noise. Equalizer bars are also called anti-roll bars and stabilizer bars.

There are two clips on the balance bar. Inside the buckle is a rubber sleeve for the balance bar. Cold in winter and hot in summer, coupled with soil and dust erosion, will become harder and harder as it ages.

Therefore, when the vehicle passes over uneven road surface, the height of the left and right wheels is inconsistent, which creates a creaking noise. 3.Loose bolts can produce unusual noises, such as loose bolts in rocker arms, linkages, and shock absorbers.

The reason is simple. It should have been a solid piece without fastening, but it will naturally shake and produce abnormal noise. Millions of car purchase subsidies.

In general, the causes of abnormal chassis noise are roughly as follows:

1. Interference between parts.

Possible cause: The two parts affect each other due to impact or the installation of other equipment.

2. Loose bolts or nuts.

Possible reasons: a. Driving on the road with poor road conditions for a long time, the bolts are naturally loosened;

b. Improper disassembly and installation of bolts damage;

c. The tightening torque is not enough or the bolt specification is wrong.

Solution: Tighten or replace the bolts and nuts.

3. The universal joint of the transmission shaft is faulty.

Possible causes: Dust cover cracked or oil leakage caused by failure to repair in time.

Solution: Replace the new transmission shaft universal joint.

4. Abnormal noise caused by damage to each ball joint, suspension and connecting bracket.

Possible causes: After long-term use, the ball joint is loose or the rubber liner is aging and crackingSolution: Replace the ball head or support pad with a new one.

5. Abnormal noise of braking system.

Possible causes: a. Loose brake pads, brake calipers or brackets;

b. Brake pad or brake disc failure;

Solution: Check whether the braking system is loose and whether the brake pads and brake discs are abnormally worn.

6. Abnormal noise of hub bearing.

It occurs at a certain speed, with a "buzzing" sound, and increases with the increase of vehicle speed.

Possible causes: Most of them are caused by ablation of hub bearings.

Solution: Replace the wheel bearings with new ones. (It is recommended to replace both sides at the same time) 7. Abnormal tire noise.

Possible causes: a. Problems with the tires themselves.

b. Abnormal tire wear.

Solution: Check whether the tire is abnormally worn, if there is, check whether the chassis is loose and improperly assembled, etc., if not, it is a problem with the tire itself.

8. Abnormal noise of the transmission.

Possible causes: Worn internal gears or low oil.

Solution: First check whether the transmission lubricating oil is sufficient, if there is no external failure, you can only unpack and check.

9. Clutch abnormal noise.

Generally, there will be an abnormal sound after pressing the clutch pedal.

Possible causes: Separation bearings are caused by less oil wear.

Solution: Replace the release bearing with a new one.

10. The chassis makes abnormal noise when passing the speed bump.

This is the most commonly encountered, and it involves a lot of scope, generally interference between parts, loose bolts and nuts and damage to shock absorbers without oil.

Hope my answer is helpful to you, thanks

The automobile chassis is composed of four parts: the transmission system, the driving system, the steering system and the brake system. The role of the chassis is to support and install the automobile engine and its various components and assemblies, form the overall shape of the car, and accept the power of the engine, so that the car can move and ensure normal driving.

The balance lever commonly used in car modification is commonly known as "top bar, tie rod". The English meaning of bar is the meaning of pull rod. According to its different purpose and functional requirements, it is divided into five categories: front wheel suspension tower top balance rod, front bottom beam balance rod and so on.

There are many kinds of abnormal noises in the car floor, mainly check the triangle rubber sleeve shock absorber and the top angle pressure bearing.

There will be many reasons that can cause abnormal noise on the ground, which is unclear here, and it is recommended to go to the repair department for careful inspection.