Knock in the rear wheel of the bike when driving

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Wrong wheel size

Grinding sound can occur after installing larger diameter wheels when they rub against the arch. It is necessary to install a tire size that meets the requirements for a particular vehicle.

Exhaust system

The exhaust system includes a manifold, a catalyst, a front exhaust pipe, a muffler, a resonator.

If extraneous noise appears in the exhaust system, it is necessary to check the fastenings of all elements. The resonator may burn out, and you will hear a loud growl from under the car.

Most likely malfunctions

The table lists the typical problems that sound signals.

Steering rack pinion wear

Loose mountings of suspension mechanisms

Deformation of the protective cover of the brake disc

Uneven wear and tear on the disc or drum.

Steering malfunctions

The load has a strong influence on the ball joints. If they are worn out, then a characteristic knock is heard in the area of ​​the right and left wheels. Immediate diagnosis required.

If the caliper breaks down, a squeak and rattle is heard. This is caused by jamming of the working cylinder or the caliper guides. The pads are constantly pressed down. This is caused by:

  • a leaky boot that could get clogged with dirt;
  • oxidation of the cylinder itself or the guides, which prevents it from returning to its original position.

knock, rear, wheel, driving

Constant knocking

If a constant sound is heard while driving, pay attention to the steering mechanisms, they are often the cause. In “Granta,” a knock coming from the rear means that the hub axle bolts or rear suspension fasteners are loose, or the parking brake cable is caught.

Why in the wheels of “Lada Granta” there are extraneous noises

Pay attention to any extraneous noises you hear. Even the smallest sound can lead to a serious problem and vehicle repair. It is necessary to diagnose these malfunctions in a timely manner in order to prevent further wear of the vehicle mechanisms.

During long-term operation, you can hear a knock, creak, hum in the “Granta” wheel during movement and braking. There are many reasons. Therefore, if extraneous noise appears, it is necessary to deal with it.

What can make similar sounds?

Troubleshooting the problems that have arisen can create certain problems, since first of all it is necessary to determine in which wheel such sounds occur. The second difficulty lies in the fact that when rotating the suspended wheel with your hands, it is not always possible to identify the source of the unpleasant sound, and sometimes even with the gear engaged, there is not even a hint of problems. In such cases, one should act by the method of exclusion, that is, carefully check all the details of this node without exception.

You need to be prepared for the fact that the seeming squeak in the rear wheel may be coming from the suspension in the area of ​​this node. Especially often, shock-absorber struts and bumpers in them sin with this. With prolonged use of the machine, the inside of the bumpers dries out or otherwise disappears, therefore, when it moves along the rod, an unpleasant sound appears. You can get rid of it by adding lubricant to these places, it is best to use lithium-based lubricants. If such a problem is found on one rack, we recommend checking the rest, for sure there are such problems as well.

Why is there a squeak in the rear wheel when driving? Disgusting, but fixable

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Some earlier, and some a little later, but almost all drivers are interested in the question of why there is a creak in the rear wheel when driving. This will be especially interesting for drivers of relatively new cars when driving without unnecessary sounds, knocks and suddenly a squeak cutting ears appears in the areas of the rear wheels.

They act in such situations in different ways, someone stops and begins to rush around their car, while others act on the principle that a good creak will come out.

How to deal with it?

Now let’s try to figure out the brakes on the rear wheels. To carry out troubleshooting, it is necessary to hang out the rear wheel. To do this, raise the rear of the car with a car jack, and for safety, you need to install an additional stand. Only then can you begin to remove the wheel and carry out diagnostics. While it has not yet been removed, it is advisable to check the wheel bearing play. To do this, grasp the tire with your hands and try to shake it horizontally and vertically.

Now they are trying to remove it from the hub, usually this is not a problem, they will arise when the turn comes to removing the brake drum. It is rarely removed, so the aluminum brake drum may “stick” to the steel hub. Experts recommend, after removing it, slightly expand the hole on the drum, in order to prevent a repetition of this in the future.

Squeaking sounds can come from brake pads and drum. Some owners change the friction pads on the pads on their own, riveting them with aluminum rivets. With significant wear, these rivets may rub against the drum, which will cause unpleasant sounds. During long-term operation of the machine, wear of the inner surface of the brake drum occurs, which is expressed by the appearance of a curb. Friction of the brake pads against these protruding parts of the drum can cause squeaking.

What else can creak?

Modern cars have disc brakes on the rear axle, which does not prevent them from generating noise. In some cases, the use of counterfeit pads can be the source of these sounds. The friction material of the pads may contain solid particles, which will cause a squeak.

There are products in which a special layer of material is installed; upon contact with the brake disc, it emits a signal notifying the driver about the need to replace the pads. Sometimes such sources can be the guide bushings of the brake cylinders of disc brakes. In this case, you need to clean them of oxides and lubricate with anti-squeak grease.

Those who drive in extreme conditions are faced with the problem of overheated brake discs. In the event that their thickness approaches critical, they can be “led”, which will also lead to the appearance of unpleasant sounds.

We tried to explain in accessible words the reasons why there is a creak in the rear wheel when driving. Of course, these are far from all possible sources of its appearance, but knowing the search algorithm, you can gradually find the problem and eliminate it.

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Typical causes of knocking in brakes

Let’s consider the typical causes of knocking and other extraneous sounds. In fact, there are few such reasons. They can be eliminated by hand.

Brake disk

Often the knocking noise in the front wheel when braking occurs due to curved discs. This occurs in the event of overheating. In the process of braking, the pads, passing through the place where there is a bend, beat against it, which causes a knock.

This problem can be treated, however, it is quite difficult to accurately identify deviations from the norm without special equipment. With severe defects, of course, everything is visible visually, but then it is better to replace the disk with a new one. You can also grind the surface of the disc on a lathe or using special tools. It is better to replace the pads, otherwise, after the disc is restored, they will again work out on it. Sometimes the curvature of the disc can be guessed by the state of the pads. Their wear will be uneven.

Drum system knocks

In such mechanisms, there are a sufficient number of places where a knock from the rear during braking can occur. The parking brake is often such a mechanism. Since the parking brake cable is divided into two parts under the car, it may well be that one of the parts has relaxed. The mechanism is weak, and when the driver presses the main brake pedal, the pads of the drum system diverge. There is a backlash between the pads and the parking brake stop bar, which is the cause of the knock.

The distribution part also knocks often. If at least one of the cables is not sufficiently tensioned, then the bar will vibrate and the driver will hear a knock when braking in the rear wheel. Another reason is the pad retainer. If it comes out of its seat, the block will move. this will provoke a hit on the drum. Rarely, a loose rear hub bearing can cause vibration. But more often it is just noise. It manifests itself at low speeds precisely during braking. Also, a rather rare reason is long wheel bolts. Longer. clings during braking. The problem is solved in an elementary way. by replacing the bolt with a short one.

In models built on the popular B0 platform, the rear mechanisms begin to creak during operation. The reason is trivial. the brake shoe rubs against the shield. It is easy to diagnose. remove the retainer, then remove the block. Scuffs will be visible to the naked eye. It is also very simple to treat this situation. the damaged area should be cleaned and greased with grease. And then the sounds will disappear.

Knocking in brakes with ABS

On vehicles equipped with ABS, it is easy to check whether it is the cause of the knock. To do this, pull out the fuse, which is designed for the operation of the system. In this case, the system will stop working, but the brakes will function. If, when braking, the knock in front or behind disappeared, then ABS is to blame.

Caliper guide play

One of the most popular causes of knocking is worn brake caliper slide mounts. In this case, a backlash appears in the caliper, which causes vibration during braking. Knocking is also common. It is very simple to solve this problem. it will completely disappear after replacing the guides.

Braking systems

This is one of the key safety factors. It is with the help of the brakes that the driver can reduce the speed of the car until it comes to a complete stop. There are several types of systems. The most common option is hydraulically driven. Here, the force from pressing the pedal is transmitted using the brake fluid to the actuators. They are located on the hubs. As for the braking mechanisms themselves, two types of solutions are used in cars. These are the popular disc brakes today and an older version. drum. In the first mechanisms, the pads interact with a disc attached to the hub. As for the second, they are located inside the brake drum. The deceleration process is carried out due to the fact that the pads are unclenched and pressed against the inner planes of the drum.

Drum brakes are a rather old and archaic solution. But on budget cars, they are still widely used. A parking brake is also implemented by means of drum brakes. Thus, there are disc systems in the front, and drum systems in the back.

Silentblocks

Whether it is a beam or an independent suspension, in any case, silent blocks are present in the rear suspension. They are designed to reduce vibrations and shocks that are transmitted to the body when the chassis is operating. The resource of silent blocks is different and ranges from 100 to 200 (and more for a semi-dependent beam) thousand kilometers. If these elements are worn out, backlash occurs. But even a slight backlash can provoke a knock, which will be clearly audible in the passenger compartment. As with shock absorbers, this sound will increase on uneven roads. How to solve the problem? There is only one way out. This is the replacement of silent blocks with new ones. On some cars, they are changed separately, on others. together with the suspension arm. After replacement, the sound disappears completely.

Disks

Many owners install discs of different widths and diameters. This has a positive effect on handling characteristics. However, everything is good in moderation. You need to choose disks wisely.

Pay attention not only to the diameter, width, bolt pattern, but also to the overhang. If the offset of the disc is less than the factory one, the wheel may touch the caliper. As a result, there is a knock in the rear wheel. It is also worth choosing the right width. If the disc and tire are very wide, there is a risk that the wheel will hit the body or suspension elements. A common case. the tire rubs against the wheel arch. This occurs when you run over any unevenness. In this case, you need to replace the tire or roll out the arches.

Wheel bearings

We continue to study why the rear right wheel knocks when driving. 9th “Lancer” or VAZ, it does not matter. the bearings buzz the same when worn. But the sound is very insidious. At first, it will be barely noticeable. If it is not detected in time, a broken clip can simply jam the wheel at speed. Also, knocking occurs if the bearing is not tightened properly. To diagnose this, it is enough to raise the rear wheel on a jack and shake it from side to side.

Note! Do not overtighten the bearing. Leave a small gap in case of thermal expansion. Slight backlash is allowed. But if the wheel is wobbling, this already indicates a problem.

Rear drive hub knocking

A banal reason. bolts

Let’s start with the simplest. A knock in the rear wheel of a VAZ when driving can occur trite due to under-tightened bolts. over, it is enough to weaken them by only a couple of degrees for an annoying knock to appear. In addition, vibration can also occur in the rear of the vehicle at high speeds. The solution to the problem is simple. To eliminate the sound that occurs when driving in the rear wheel, it is necessary to tighten the bolts.

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Brake system

She, too, can provoke sounds in the area of ​​the rear wheel. With what it can be connected? The reason will depend on which brake mechanism is installed. disc or drum.

In the first case, it is possible to ascertain the beating of the pads on the disc. Very often this happens on budget foreign cars. To solve this problem, it is necessary to revise the caliper. As a rule, bushings are worn in it, along which it moves. Today, there are special repair kits that include oversized rubber bands. They are installed instead of the old ones on the bushings. After that, the knock disappears.

In the case of reels, the situation is different. Sound may be due to a deformed drum cover. If it is oval, the element hits the pads as it rotates. The result is a strange noise. In this case, the pads will have uneven wear when the cover is removed. In this case, the drum must be replaced with a new one.

Knocking in the rear wheel when driving: possible causes of breakdown

A modern car is a whole complex of complex systems and mechanisms. One of the important components of any car is the suspension. It is she who provides the connection between the wheels and the car body. There are several suspension schemes, but if any of them malfunction, the driver may hear a characteristic knock in the rear wheel when driving. The reasons for this phenomenon can be different. In today’s article we will look at why the rear wheel knocks when driving and what can be done about it.

Springs

Over time, the springs sag. However, this is not the only misfortune that can happen to them. So, the turns can burst. As a result, the car not only skews to one side, but also a knock in the rear wheel. The spring does not fit as intended. The solution to the problem is to replace it with a new one.

It is also worth inspecting the top and bottom rubber spring gasket. Over the years of operation, rubber is destroyed. As a result, the gasket does not fulfill its function and the spring coils rub directly against the metal.

Rear wheel arch liners

Very often, owners of budget cars install plastic wheel arch liners back. They are also called lockers. Since they are not installed from the factory on many cars, the owners mount them on their own and very often with serious errors. As a result, the fender liner may simply move away from the mountings. As a result, there is a knock in the rear wheel when driving, as the locker hits the tire.

A similar situation can occur on a well-secured locker. But this occurs when the vehicle is heavily loaded. As a result, the distance between the locker and the tire decreases. When hitting a pit, the wheel simply beats against the plastic protection. As soon as the car goes without load, the knocking disappears. This indicates an overload or the installation of a wheel that is too large (disc of the wrong diameter, or rubber with a high profile), as a result of which the suspension travel is greater than the distance between the tread and part of the wheel arch liner.

Knocking in the rear wheel when driving: possible causes of breakdown

A modern car is a whole complex of complex systems and mechanisms. One of the important components of any car is the suspension. It is she who provides the connection between the wheels and the car body. There are several suspension schemes, but if any of them malfunction, the driver may hear a characteristic knock in the rear wheel when driving. The reasons for this phenomenon can be different. In today’s article we will look at why the rear wheel knocks when driving and what can be done about it.

Shock absorbers

This is another reason for the knocking sound in the rear wheel when driving. The service life of shock absorbers is on average 60 thousand kilometers, but there may be a large error due to driving style and road conditions. You can identify a worn shock absorber by leakage. There will be oil drips on the cylinder surface. However, this is not always the case. You can also recognize a broken shock absorber by the behavior of the car. The car will jump on holes and sway at speed. In addition, there will be a knock on the rear wheel when driving. This sound is amplified on bumps. Since the shock absorber is not repairable, it is completely replaced with a new one. And it is desirable to change two sides at once. Their resource is approximately the same, therefore, with a high probability, the neighboring shock absorber will require replacement after 3-5 thousand kilometers.

Also, a knock in the rear right wheel when driving can happen due to a broken shock absorber bushing. To check this, it is enough to shake the element to the sides. The shock absorber must be securely attached at the top and bottom. On vehicles such as the DAEWOO-Nexia, the rear shock absorber is attached at the top to the body via a rubber washer. If it is even slightly damaged, there can be very strong knocks on the bumps. At first, the owner will think it is time to change the shock absorber. But after replacing it, the problem does not go away. Therefore, it is not always necessary to condemn this element at once. You must first check the condition of all rubber elements that are involved in the shock absorber mount.

Springs

Over time, the springs sag. However, this is not the only misfortune that can happen to them. So, the turns can burst. As a result, the car not only skews to one side, but also a knock in the rear wheel. The spring does not fit as intended. The solution to the problem is to replace it with a new one.

It is also worth inspecting the top and bottom rubber spring gasket. Over the years of operation, rubber is destroyed. As a result, the gasket does not fulfill its function and the spring coils rub directly against the metal.

Silentblocks

Whether it is a beam or an independent suspension, in any case, silent blocks are present in the rear suspension. They are designed to reduce vibrations and shocks that are transmitted to the body during chassis operation. The resource of silent blocks is different and ranges from 100 to 200 (and more for a semi-dependent beam) thousand kilometers. If these elements are worn out, backlash occurs. But even a slight backlash can provoke a knock, which will be clearly audible in the vehicle interior. As with shock absorbers, this sound will increase on uneven roads. How to solve the problem? There is only one way out. This is the replacement of silent blocks with new ones. On some cars, they are changed separately, on others. together with the suspension arm. After replacement, the sound disappears completely.

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Brake system

She, too, can provoke sounds in the area of ​​the rear wheel. With what it can be connected? The reason will depend on which brake mechanism is installed. disc or drum.

In the first case, it is possible to ascertain the beating of the pads on the disc. Very often this happens on budget foreign cars. To solve this problem, it is necessary to revise the caliper. As a rule, bushings are worn in it, along which it moves. Today, there are special repair kits that include oversized rubber bands. They are installed instead of the old ones on the bushings. After that, the knock disappears.

In the case of reels, the situation is different. Sound may be due to a deformed drum cover. If it is oval, the element hits the pads as it rotates. The result is a strange noise. In this case, the pads will have uneven wear when the cover is removed. In this case, the drum must be replaced with a new one.

Springs

Over time, the springs sag. However, this is not the only misfortune that can happen to them. So, the turns can burst. As a result, the car not only tilts to one side, but also a knock in the rear wheel. The spring does not fit as intended. The solution to the problem is to replace it with a new one.

It is also worth inspecting the top and bottom rubber spring gasket. Over the years of operation, rubber is destroyed. As a result, the gasket does not fulfill its function and the spring coils rub directly against the metal.

Springs

Over time, the springs sag. However, this is not the only misfortune that can happen to them. So, the turns can burst. As a result, the car not only tilts to one side, but also a knock in the rear wheel. The spring does not fit as intended. The solution to the problem is to replace it with a new one.

It is also worth inspecting the top and bottom rubber spring gasket. Over the years of operation, rubber is destroyed. As a result, the gasket does not fulfill its function and the spring coils rub directly against the metal.

Shock absorbers

This is another reason for the knocking sound in the rear wheel when driving. The service life of shock absorbers is on average 60 thousand kilometers, but there may be a large error due to driving style and road conditions. You can identify a worn shock absorber by leakage. There will be oil drips on the cylinder surface. However, this is not always the case. You can also recognize a broken shock absorber by the behavior of the car. The car will jump on holes and sway at speed. In addition, there will be a knock on the rear wheel when driving. This sound is amplified on bumps. Since the shock absorber is not repairable, it is completely replaced with a new one. And it is desirable to change two sides at once. Their resource is approximately the same, therefore, with a high probability, the neighboring shock absorber will require replacement after 3-5 thousand kilometers.

Also, a knock in the rear right wheel when driving can happen due to a broken shock absorber bushing. To check this, it is enough to shake the element to the sides. The shock absorber must be securely attached at the top and bottom. On vehicles such as the DAEWOO-Nexia, the rear shock absorber is attached at the top to the body via a rubber washer. If it is even slightly damaged, there can be very strong knocks on the bumps. At first, the owner will think it is time to change the shock absorber. But after replacing it, the problem does not go away. Therefore, it is not always necessary to condemn this element at once. You must first check the condition of all rubber elements that are involved in the shock absorber mount.

Shock absorbers

This is another reason for the knocking sound in the rear wheel when driving. The service life of shock absorbers is on average 60 thousand kilometers, but there may be a large error due to driving style and road conditions. You can identify a worn shock absorber by leakage. There will be oil drips on the cylinder surface. However, this is not always the case. You can also recognize a broken shock absorber by the behavior of the car. The car will jump on holes and sway at speed. In addition, there will be a knock on the rear wheel when driving. This sound is amplified on bumps. Since the shock absorber is not repairable, it is completely replaced with a new one. And it is desirable to change two sides at once. Their resource is approximately the same, therefore, with a high probability, the neighboring shock absorber will require replacement after 3-5 thousand kilometers.

Knock Knock, Loose Hub | Tech Tuesday #117

Also, a knock in the rear right wheel when driving can happen due to a broken shock absorber bushing. To check this, it is enough to shake the element to the sides. The shock absorber must be securely attached at the top and bottom. On vehicles such as the DAEWOO-Nexia, the rear shock absorber is attached at the top to the body via a rubber washer. If it is even slightly damaged, there can be very strong knocks on the bumps. At first, the owner will think it is time to change the shock absorber. But after replacing it, the problem does not go away. Therefore, it is not always necessary to condemn this element at once. You must first check the condition of all rubber elements that are involved in the shock absorber mount.

Brake system

She, too, can provoke sounds in the area of ​​the rear wheel. With what it can be connected? The reason will depend on which brake mechanism is installed. disc or drum.

In the first case, it is possible to ascertain the beating of the pads on the disc. Very often this happens on budget foreign cars. To solve this problem, it is necessary to revise the caliper. As a rule, bushings are worn in it, along which it moves. Today, there are special repair kits that include oversized rubber bands. They are installed instead of the old ones on the bushings. After that, the knock disappears.

In the case of reels, the situation is different. Sound may be due to a deformed drum cover. If it is oval, the element hits the pads as it rotates. The result is a strange noise. In this case, the pads will have uneven wear when the cover is removed. In this case, the drum must be replaced with a new one.