Volkswagen has an abnormal sound on the chassis over uneven roads?

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.

Normally, if the parts of the vehicle chassis are worn, especially the ball head position, there will be abnormal noise when crossing uneven roads.

It mainly explains that when driving over the uneven road surface, the chassis has abnormal noise, and after inspection, it is found that it is caused by the wear of the ball head inside and outside the steering machine, and the troubleshooting is troubleshooting after replacing the ball head inside and outside the direction machine.

If the chassis is abnormal, it is best to hear the sound to judge, it is recommended to go to the store to test the car to check, mainly whether the rubber of the chassis is aging and so on.

When you walk to a bad road, the abnormal sound of stepping on the brakes disappears, and as soon as the brakes are released, the sound of gurgling will come immediately! Draw conclusions! It may be a problem with the brake guide cutting, it may be loose, go back and claim it, replace it with a new one, fortunately there is a stock, the master will directly bring it to change, and it will be done in half an hour!

Removed the two front wheels and took the brake calipers apart, the problem was that there was such a small thing in the calipers, four in total, two on each side! After changing the outfit and going to the original cement floor to test the car, the abnormal noise disappeared, haha, finally much cooler, and I won't feel that the chassis has a loose feeling!

Check to see if there is a problem. Go fix it?

Solution: Check the exhaust pipe, it may be caused by the position of the ball head of the exhaust pipe, this kind of abnormal noise is more common, and you need to replace the new exhaust ball head. This kind of abnormal noise will be more obvious when the car is cold, followed by it will be more obvious when changing gears, and the abnormal noise is not easy to appear in high-speed driving, and this sound will not affect the normal use of the vehicle and will not affect driving safety.

Suggestion: After hearing an abnormal sound while driving, drive to the repair station as soon as possible, check it, and replace spare parts, and the chassis should be checked regularly for older cars.

It may be that the plane bearing is broken, you can stop when one person plays the steering wheel in the car, and the other person touches the spring of the shock absorber, such as the spring shakes the hand when playing the direction, indicating that there is a problem with the plane bearing on the shock absorber, you can go to the auto parts city to replace it (save money), if not, you need to go to the auto repair shop to check the power steering pump, lower arm, and steering machine assembly.

Hello, the abnormal sound of the vehicle chassis is mainly to check whether there is deformation caused by the bottom of the chassis, contact resonance, check whether the chassis is connected to the rubber sleeve, whether the ball head is loose, broken or the gap is too large.

It is relatively normal for you to have abnormal noises on the chassis on the bumpy road, especially for old cars, it is recommended to raise the ground of the vehicle and then check the bottom of the car, and then pay attention to the sound when driving.

If the chassis of the Passat has an abnormal sound when crossing a bumpy road, you need to check the shock absorption or shock absorbing rubber sleeve.

Hello, this may be caused by a broken chassis suspension, it is recommended to check the chassis suspension of the vehicle.

1. Distinguish between engine squeak and rear axle squeak.

First of all, the car is driven on the flat road for a certain mileage, so that the working temperature of the rear axle rises to normal, and then when the car makes an abnormal noise, write down the speed, after stopping, put the transmission in the neutral position, and then slowly accelerate until the speed of the engine is equivalent to the speed when the abnormal noise occurs, observe whether there is any abnormal noise, and can be repeated several times to determine whether the abnormal noise is caused by the abnormal condition of the exhaust or the engine.

2. Distinguish between tire noise and rear axle noise.

Tyre noise varies with the road surface, but not rear axle noise. When the speed of the car is below 48kmh, the rear axle noise disappears, while the tire noise continues. The noise of the tires is the same when the car is driving and coasting, but the noise on the rear axle is different.

3. Distinguish the abnormal noise of the wheel bearing and the noise of the rear axle.

When the car is driving and coasting, the noise of the front wheel bearing remains unchanged, if the speed of the vehicle remains the same and the brake is applied slightly, the wheel bearing can reduce part of the load, so that the noise can be reduced, and the noise source can be found.

When the speed is greater than 48kmh, unless the rear axle is seriously damaged, the noise of the rear wheel bearing can rarely be heard under normal circumstances, when the car is coasting or neutral, the cracked rear wheel bearing will produce a "rumbling" sound, and the corroded rear wheel bearing will make a "rustling" sound.

4. Distinguish the abnormal sound of the reducer cone active bearing and the differential bearing.

The reducer bearings usually produce a harsh "rumble" or "rattle" sound, and the sound beat is stable and changes with the speed of the vehicle.

The sound of the front bearing of the bevel driving gear of the reducer is louder when the car is coasting, and the noise of the rear bearing is louder when driving.

The noise of the differential bearing is usually a constant harsh sound, but its beat is much more tempered than that of the reducer tapered drive gear bearing.

5. Distinguish the noise of the rear axle gear.

In a normal straight line, the noise is not audible because there is almost no relative movement of the differential half-shaft gears and planetary gears.

During the driving of the car, the reason for the abnormal sound of the rear axle gear is mostly caused by poor lubrication, which leads to the reducer gear grinding scars, if the abnormal sound can be heard at various sliding speeds, it means that it is caused by the loosening of the nut of the reducer driving gear.

At low speeds, there is a knocking sound on the rear axle, and when accelerating or decelerating, it makes a particularly dull abnormal sound. The cause of the above fault can be found in one or more of the following places:

Improper clearance between the differential half-shaft gear journal and the differential housing.

Improper mating of the differential cross shaft journal with the differential housing.

The backlash between the half-shaft spline gear and the differential half-shaft gear keyway is improper.

Improper meshing backlash between the half-shaft gear of the differential and the planetary gear.

Improper backlash of the differential cone active and passive gears.

Thrust washers are worn.

When the vehicle is moving, the abnormal noise on the rear axle is due to improper clearance of the gear mesh, improper adjustment of the differential bearing preload, or both. When eliminating abnormal noise, it is necessary to disassemble and check the meshing gap between the differential gear and the reducer gear, the preload of the reducer bevel driving gear bearing and the contact traces of the reducer gear.

This situation may be caused by the loosening of the chassis connection or other components, or the crack in the shock-absorbing rubber sleeve, you can check it at the store.

If you want to solve this problem, you still have to go to the after-sales store and ask them to test what is causing it.

Hello, this situation may be caused by the amount of vehicle chassis parts, and you need to go to the repair shop to lift the car up and check the chassis to determine. Focus on inspecting the lower arm.

If there is an abnormal sound in the chassis, it should be a problem with the shock absorption, and it is recommended that you go to a local professional repair shop to check the specific situation.

In this case, it is recommended to go to the repair shop for inspection and maintenance in time, so as not to affect the overall safety performance of the vehicle.

Generally, the rocker arm rubber sleeve is rotten or the shock absorbing top rubber is rotten.

The abnormal sound of the chassis of the car may be the abnormal sound of the suspension of the car. The suspension system of the car generally includes the upper and lower swing arms, balance bars, ball head shock absorption, etc., and the abnormal sound caused by the suspension system is generally a dull or crisp impact sound. For example, after the balance rod is damaged or the bushing is worn, there will be a continuous abnormal sound of "Gregrad" when passing through bumpy roads, and there will be a dull sound of "knock knock" when the shock absorption is damaged through pits or bumpy road sections.

If the vehicle has this kind of abnormal noise, it is best to repair it as soon as possible, as damage to the suspension system will lead to deviation from the direction and tires.

It is also possible that constant velocity joints are commonly known as cages, which are divided into inner cages and outer cages. If the vehicle turns in the middle of the driving and there is an abnormal sound similar to "rattle rattle", it is usually caused by serious wear and tear of the constant velocity universal joint, and you only need to confirm which side the abnormal noise is, and then replace the constant velocity universal joint can be solved.

Abnormal noise of automobile bearings. No matter how big the tires of the car, the connection between the body and the tires is by a small wheel core bearing, the core bearing is damaged, the vehicle will make a continuous abnormal sound similar to "buzzing", the faster the speed, the stronger the sound, if the bearing is slightly damaged, there will generally be abnormal sound when the direction is lightly hit. Severe bearing damage will cause the tire to deviate, and serious tire eating will cause the tire to fall off.

The above is the more common abnormal noise of the automobile chassis, if the vehicle has the above abnormal noise, it must be repaired and replaced as soon as possible. After all, there are many reasons for the abnormal noise of a car, so you have to go to the repair shop for detailed maintenance.

Hello, if there is an abnormal sound on the ground when the Passat is in a bumpy situation, you need to check the shock absorber or shock capsule.

Abnormal chassis noise due to loose bolts is well known. It should be a solid piece with no sail fastening, which will naturally shake and signal hail to produce abnormal noise. The abnormal sound of the chassis caused by loose screws is often not necessarily a squeak, but may also be a slight metal knocking sound, especially when walking on bumpy roads.

The abnormal noise caused by the problem of brake system mode disturbance, the abnormal noise in the braking system is mostly sharp and continuous sound, the brake pads are too thin, and the brake disc and brake pads are worn unevenly. , and various reasons can cause abnormal brake sounds. Problems with brake pads are one of the main causes of abnormal noise, as brake pads wear out, are consumable parts, and need to be replaced regularly.

If the thickness of the brake pads is worn to less than 3 mm, they should be replaced. If 2mm is the limit, it must be replaced. The service life of the front brake pads is generally about 50,000 kilometers.

The rear disc brake pads have a service life of about 120,000 km. In addition, if there is a quality problem with the brake pads (the brake pads are too hard), there will be abnormal noise. In addition to brake pads and discs, the brake master cylinder, master cylinder and brake caliper can also produce unusual noise if they fail.

Abnormal noise of the exhaust pipe, loose screws of the heat shield plate on the side of the exhaust pipe, loose and leaking air of the exhaust pipe joint, rust and damage of the exhaust pipe, etc. It will cause abnormal noise in the exhaust pipe. When you step on the accelerator to accelerate, you will hear a dull sound of bang, most likely because of damage somewhere in the exhaust pipe; The abnormal noise of the exhaust pipe increases when braking suddenly, especially when walking on bad roads.

This is basically caused by a partial loosening of the exhaust pipe and chassis, which needs to be firm.

Millions of car purchase subsidies.

When driving, I feel that there is an abnormal sound in the chassis, probably because the chassis is too low, and then the road is bumpy. The road conditions are relatively bad, and there are a lot of stones. That's why I feel that the car has an abnormal noise.

So now there are a lot of people who go to buy off-road vehicles or SUVs. Both of these chassis are relatively tall。There is no need to worry about this on the concrete pavement of some cities.

However, on the roads of some towns and villages, it is still necessary to buy some cars with relatively high chassis. Because that's the only way to make your car durable. The road conditions in the countryside are very complicated.

Be sure to buy a car with a relatively high chassis. It will have good protection for the car. Because the car is still relatively delicate.

If the chassis is worn for a long time, the life of the car will be reduced.

For example, any kind of car with a higher chassis will be relatively expensive. Probably because the design of this one is more expensive. We still have to consider many aspects when buying a car.

You can go to some professional car sellers. You can also check some forums on the Internet that are more car-savvy. There are a lot of detailed data on the car above.

I don't think I can listen to the casual introduction of the car seller. They don't necessarily really tell you what the weakness of the car is. All the good things that are introduced by all means.

Therefore, we should still inquire more information ourselves.

Nowadays, there will be a lot of people who trade second-hand cars, in fact, the pit of second-hand cars is the most. Because it is impossible to see what the shortcomings of a car are based on its appearance alone. It must be professional and more knowledgeable about cars to be able to see it.

For example, the engine is worn, or some fuel tanks will leak. And if you sell the car in question back to your own home, it will be very bad.

So we must check the information before buying. Check all kinds of data of the car. In particular, a detailed investigation of the weaknesses of this car is required. If we can accept this weakness, I don't think there is anything wrong with this car.