What happens when the Volkswagen Golf makes an abnormal noise when reversing after driving for a whi

Personally, I think this is the sound of the brake caliper colliding with the bracket when reversing. Because the brake caliper will be subjected to a forward force because of the wheel inertia when driving forward and braking, and the brake caliper will be subjected to a force that goes backward and upward when reversing, the brake caliper and the bracket of the vehicle are generally floating links, there is a certain activity clearance, after you drive forward for a period of time and brake, the caliper will move forward a little from the normal position because of the force, and at this time the reversing brake caliper will be dragged to the rear, one before and one after the other makes this distance longer, so the sound of hitting the bracket is louder. At this point, the brake calipers are already in the rear position, and there is no longer a crashing sound due to the large moving gap.

This problem should not affect the performance of the vehicle. However, there are many reasons for abnormal vehicle noise, and I am only making personal inferences based on descriptions, so it is better to communicate with the 4S store and conduct a thorough inspection.

Let's put forward the following questions and study them together.

1: During the 4S inspection, did you demonstrate to the mechanic and verify that it was indeed there? But the master can't find the root cause?

2: When you are reversing, first step on the foot brake and then hang the reverse gear, and then release the foot brake. Are you pressing the footbrake a little too hard?

Causes this sound to make when you release your foot brake and the brake pads clutch instantaneously?

Because the brake pads are too new, it is possible to make this sound when the brake pads are clutched instantaneously when moving in reverse. ）

3: Your car is displacement. That is, it is not a dual clutch. Or a traditional clutch and gearbox.

On this premise, this problem occurs after you hang the reverse gear, and I am a little skeptical of the gearbox reverse gear.

The upstairs is quite technical, and I will provide you with the following content about the brake calipers, refer to the reference below.

However, whether it is due to the problem of the brake caliper is debatable. Because it is a new car, the problem of brake calipers should not have such a big reaction.

I think if one or two wheels ring, it's 'probably' that the brake pads are fixed, and if the whole car rings, it's the Volkswagen Golf that's wrong.

I also have it in my car, manually. In the case of slow braking, this sound does not appear.

It may be the brake pads, or it may be the brake shaft.

There are many kinds of brake noise, including normal noise, there are abnormal noises, whether it is a new car on the road, or tens of thousands or even hundreds of thousands of kilometers of vehicles, the problem of brake noise can occur at any time, understanding the cause of brake noise can help us better judge the fault, so as to improve the awareness of safe driving.

1. Normal start of ABS.

The working process of ABS is actually the cyclic working process of locking, loosening, locking, and loosening, so that the vehicle is always in a critical locking gap rolling state, so when you press the brake sharply to trigger ABS work, it will have a gurgling sound, this abnormal sound is a normal phenomenon, at this time, you can brake vigorously to the end.

2. The brake pad disc is corroded.

When parking for a long time, especially after the climate is humid or rainy, there will be a certain amount of rust or dirt on the brake disc or brake pads, which can be solved by driving for a while, or you can apply butter or special lubricating oil to the connection between the brake pads and brake calipers.

3. New brake pads.

If your car is a new car or has just been replaced with new brake pads, then the new brake pads and brake discs need a run-in process, when the brakes are stepped on, this abnormal sound will be emitted, which is completely normal.

4. Excessive wear of brake discs and brake pads.

Brake discs and brake pads are high consumables, each time the brake two parts have to rub, in the long run, there will be natural loss, when the wear is excessive, there will naturally be abnormal noise, so it should be checked and replaced regularly. Usually the replacement cycle of brake pads is 6-80,000 km, while the brake disc is 10-120,000 km. (Photo by photo:.)

Pacific Automobile Network Zeng Caihong).

There are many types of abnormal braking noise, including normal noise and abnormal noise. Whether it is a new car on the road, or a vehicle that has driven tens of thousands or even hundreds of thousands of kilometers, the problem of abnormal brake noise may occur at any time. Understanding the causes of abnormal braking noise can help us better identify faults and improve safe driving awareness.

Boots normally. The working process of ABS is actually a lock-release-lock-release cycle working process, so that the vehicle is always in a critical locking gap rolling state. Then when you slam on the brakes to trigger the ABS to work, it will make a thumping sound, which is a normal current grip phenomenon. At this time, apply the brakes hard to the end.

2.Brake pads The brake discs are rusty.

After parking for a long time, especially after wet or rainy weather, there will be some rust or dirt on the brake disc or brake pads, which can be solved after a while, or the connection between the brake pads and brake calipers can be coated with yellow back oil or special lubricating oil.

3.New brake pads.

When a new car brakes, it makes a similar noise. If your car is new or has just been replaced with new brake pads, then the new brake pads and brake discs need to be a break-in process. When you brake, it makes this abnormal noise, which is completely normal.

4.Excessive wear of brake discs and brake pads.

Brake discs and pads are highly consumable products. Every time you brake, the two parts rub together, which naturally leads to wear and tear over time. When they are excessively worn, they naturally produce unusual noises, so they should be inspected and replaced regularly.

Usually the replacement cycle of brake pads is 6-80,000 kilometers, while the replacement cycle of brake discs is 10-120,000 kilometers.

Millions of car purchase subsidies.

The reasons for the abnormal sound of golf brakes are as follows: 1. The brake pads are excessively worn, and when the brakes are pressed, the friction between the brake disc and the brake pads reaches the alarm position of the brake pads, resulting in sharp metal noise. 2. Rust of brake pads or brake discs, in wet weather after long-term parking, there will be dirt or rust on the brake discs and brake pads, at this time, the brakes will affect the rust and affect the friction, so as to make abnormal noises, and the brakes can be eliminated by stepping on the brakes a few more times.

3. The car has just replaced the brake pads, and the parts between it and the original car need to be run in for a period of time, so when it is used at the beginning, it will make abnormal noises because of insufficient running-in.

The abnormal sound caused by the loose brakes of the automatic transmission car is too slow, and there will be a squeaky sound when the brakes are released when starting.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. In the case of a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that due to their lack of understanding of mechanical knowledge, they mistake reasonable abnormal noise as a vehicle failure.

Therefore, learn to distinguish the abnormal noise of the car and avoid wasting time and energy.

The identification of car noise is limited, and it is difficult to use special instruments to measure the sound of the car, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

Today, Bian Xiao tells you something about cars. Recently, a friend asked Bian Xiao what caused the abnormal sound by stepping on the brakes when reversing. This is Bian Xiao's. If you are interested, you can learn about it, maybe it will be helpful to you.

This is a noise caused by friction between the brake pads and the brake disc. This is normal and there is no need to worry about it.

When the vehicle's braking system is working, the brake pads and brake discs rub against each other. Naturally, some noise will inevitably be made when driving at low speeds.

The key to the automotive braking system is composed of a vacuum booster pump, a brake master cylinder, a brake cylinder, a brake pad and a brake disc.

When the driver presses the brake pedal, the vacuum booster pump assists the driver by allowing the driver to easily press the brake pedal.

The vacuum booster pump can only work when the engine is working. When the engine is turned off, the vacuum-booster pump is unable to supply power.

The vacuum booster pump is located in the engine compartment. When the bonnet is opened, a black metal disc can be seen under the windshield on the main driver's side. This disc is the vacuum booster pump.

In front of the vacuum booster pump is the brake master cylinder. This pump has an oil pot on it. This oil pot is used to hold brake fluid.

The braking system of a vehicle relies on brake fluid.

When the brake pedal is pressed, the brake master cylinder pushes the piston of the brake cylinder through the brake oil, causing the piston to push the brake pads to clamp the brake disc. Only then will the vehicle slow down.

Brake fluid needs to be changed regularly. Since brake fluid is a liquid that easily absorbs water, the water absorption of brake fluid will affect the braking force and prolong the braking distance.

This is the end of Bian Xiao's introduction. After reading these introductions, do you have a certain understanding of why there is an abnormal sound when reversing when you step on the brakes? I hope Bian Xiao's introduction can be helpful to you, and you can go to other pages of this site to continue reading. Thank you for your support.

First of all, your question, it is normal to have an abnormal sound when reversing the brakes.

Reasonable explanation: This problem is because the time of the vehicle driving forward accounts for 99% of the vehicle's mileage, and the brake pads and brake discs are worn in one direction for a long time when the brakes are pressed, and there is a certain metal component in the brake pads, resulting in some metal burrs on one side of the brake pads. When the brakes are applied while reversing, the tips of these burrs will come into contact with the brake disc, which is the main reason for the abnormal noise, which is normal.

Brake pads (virtual collapse brakelining) In the braking system of the car, the brake pad is the most critical safety part, and the quality of all brake effects is the decisive role of the brake pad, so it is said that a good brake pad is the protector of people and cars. The thermal insulation layer is composed of materials that do not transfer heat, and the purpose is to insulate heat. The friction block is composed of the core material and adhesive of the friction shirt, and is squeezed on the brake disc or brake drum to produce friction when braking, so as to achieve the purpose of decelerating and braking the vehicle.

As a result of friction, the friction blocks are gradually worn out, and generally speaking, the lower the cost of the brake pads, the faster they will wear out.