The appearance of foreign sounds in the front of the car is always a wake-up call for the driver, requiring immediate attention. When front-wheel When driving, ignoring this symptom becomes not only unpleasant, but also dangerous, since it can indicate critical wear of the brake system components or suspension elements. The nature of the sound, its frequency and the conditions of occurrence allow an experienced mechanic to determine the source of the problem with a high degree of probability without deep disassembly of the node.
In this article, we will analyze in detail all possible causes of creaking, from the banal hit of pebbles to serious technical malfunctions that require replacement of parts. Understanding the nature of sound will help you avoid costly repairs in the future and ensure road safety.
Diagnostics of the brake system as a source of noise
The most likely reason for an unpleasant metal or whistling sound from under the wheel is brake. In 80% of cases, the problem lies in worn brake pads, on which the friction lining has worn out, and the metal base begins to rub against the disc. This creak is often intensified when pressing the brake pedal, but can also occur when coasting if the pad is pecked.
Also, the source of sound can be the brake disc itself, the surface of which is covered with rust or soot, especially after a long parking in wet weather or after passing through deep puddles. In this case, the sound is usually short-lived and disappears after several intense braking as the disc surface is cleared.
- 🔍 Wear of the pads: presence of metal shavings or characteristic screeching with a light touch of the pedal.
- 🔍 Disk deformation: The beating of the steering wheel and the pulsation of the pedal along with the creak.
- 🔍 Mud and sand: The ingestion of abrasive particles between the pad and the disc.
⚠️ Attention: If you hear a constant metal grinding, do not delay a visit to the service. Operating a car with completely erased pads will damage the brake disc, the replacement of which costs much more.
For accurate diagnosis, it is necessary to remove the wheel and visually assess the condition of the friction linings. The residual thickness of the material shall not be less than 2-3 mm. If you find that the pads are “stick” to the caliper due to the rare use of parking brakes or corrosion of guides, you will need to design or replace them.
Failures of the tarmac bearing
The second most common cause of noise is failure. hub bearing. Unlike brakes, the bearing rarely makes a sharp creak, more often it is a hum or howl, which increases with increasing speed. However, in the initial stage of destruction or in the absence of lubrication, the bearing may produce a piercing creak or whistle, which varies depending on the load on the axle.
To check the condition of the bearing, you need to lift the car on the jack and sway the wheel in the vertical and horizontal planes. The presence of backlash or characteristic crunch when the wheel is rotated with the hand clearly indicates the need to replace the part. Ignoring this problem can lead to a jamming of the wheel on the go.
Experts recommend changing the hub bearings in pairs on one axis, even if the second one does not emit sounds, since the resource is approximately the same. Use of original parts or quality analogues from proven brands, such as: SKF or FAGIt guarantees a long service life of the node.
When replacing a hub bearing, always change the hub nut as it is disposable and loses its properties after the first tightening.
Problems with suspension elements and silent blocks
If the brakes and bearings are working, it is worth paying attention to rubber metal hinges, known as plumblock. When rubber is drying or cracking from old age and reagents, metal bushes begin to rub against each other, producing a nasty creak. Most often this happens in the levers of the front suspension, especially in frosty weather when the rubber tans.
Another source of sound can be stabilizer racks or ball supports. Although their breakdown is more often accompanied by knocking, in some cases, when the lubricant is washed out and the anther is damaged, dry friction of the metal occurs, which the driver perceives as creaking. Diagnostics of such malfunctions requires the use of an mounting blade to create a load on the suspension units.
To extend the life of the Silentblocks and ball supports, it is recommended to regularly wash the suspension elements on the high pressure wash, removing accumulated dirt and salt, which accelerate the destruction of rubber and washing out the lubricant.
Protective housings and foreign objects
Sometimes the reason for the banal creak lies in the banal hit of a foreign object. A stone stuck between the brake disc and shield-shell (metal shield), able to emit a deafening screech when moving. This sound usually appears suddenly and is not dependent on brake pressing or steering.
Also, the protective shield itself could deform after impact or driving on a deep track. If it is bent towards the disc, it will constantly rub against the rotating part, causing heat and a characteristic sound. This can be corrected by simply bent the shield with a screwdriver through the technological hole in the wheel disc without removing the wheels.
- 🪨 Stone: Getting stuck in the perforation of the disk or between the shield.
- 🛠️ Deformation: curvature of the metal brake screen.
- 🌲 Branch: The foreign body is hit from the outside during movement.
⚠️ Attention: Do not attempt to remove the stuck stone with your fingers while the disc is hot – this will cause serious burns. Wait for the brake system to cool down or use a long screwdriver.
Effects of weather and humidity
Seasonality plays an important role in the appearance of extraneous sounds. In winter, at low temperatures, creaking can occur due to freezing of moisture in the nodes of friction or tanning of rubber elements. Water trapped on the brake discs can create a thin crust of ice or oxides that creak at the first kilometers of run until full warming up and drying.
In spring and autumn, when roads are actively treated with reagents, chemicals can interact with brake pad materials, causing a temporary creaking effect. This usually goes away after several cycles of heating and cooling of the brakes.
Why creaks in wet weather?
Moisture enters the surface of the brake disc, forming a thin layer of oxidation. At the first braking, this layer is cleaned, making a sound. If the creak does not go away after 10-15 minutes of movement, the cause is deeper.
It is important to distinguish between temporary sounds caused by weather and persistent malfunctions. If the car is warmed, the road is dry and front-wheel This means that the problem is mechanical and requires intervention.
Remediation and prevention
Elimination of squeak depends on the identified cause. If the problem is in the brakes, often helps lubrication of the guide calipers and the back of the pads with a special high-temperature lubrication. It is important to use only specialized formulations, since ordinary lubricant (for example, Litol or Graphite) will leak and spoil the brake pads when heated.
The table below shows the main methods for eliminating common causes of creaking:
| Cause of the squeak | Elimination method | Difficulty |
|---|---|---|
| Wearing of the pads | Replacement of the set of pads | Low. |
| Mud in the caliper | Cleaning and lubrication of guides | Medium |
| Getting stoned | Extraction of foreign object | Low. |
| Wear of bearing | Replacement of the hub | Tall. |
Prevention is the regular maintenance. With each change of wheels (re-shoes), it is recommended to remove the wheels and inspect the condition of brake discs and pads. Timely lubrication of the guide calipers with each second replacement of the pads significantly prolongs the life of the entire braking system.
☑️ Checklist for squeak diagnosis
Regular diagnosis of the chassis allows you to identify the problem at an early stage, when repairs are cheaper and do not require replacing expensive components in the assembly.
Frequently Asked Questions (FAQ)
Can I drive if the wheel is creaking?
You can only drive if you are sure that the sound is caused by moisture or temporary factors. If the creak is metal and permanent, operation of the car is prohibited, as this can lead to brake system failure or wheel jamming.
How much does it cost to eliminate the squeak?
The cost depends on the reason. Lubricating calipers is inexpensive, whereas replacing a hub bearing or brake discs will require costs for parts and work. On average, diagnostics and minor repairs cost 1000-3000 rubles, not counting the cost of parts.
Will WD-40 help to remove the creak?
Use WD-40 in the brake system categorically. It will wash away the remnants of lubrication, damage rubber seals and, once on the friction linings, make the brakes ineffective, which will lead to an emergency.
Why does the new wheel creak or after the shoe is replaced?
The new pads should be worn to the disc. In the first 100-200 km of run, a slight creak is possible. If the sound is strong and does not pass, it is possible that a poor-quality spare part without anti-scrip plates is installed or the assembly is not assembled correctly.