Symptoms of faulty/ failed wheel bearing

Symptoms of faulty/ failed wheel bearing 

1. Humming sound: 
The first sign you will notice is the distinctive sound. The humming sound is synonymous for this issue.
Typically, first comes a barely audible buzzing sound that is readily confused with, for instance, an underinflated tire. As the issue worsens, the buzzing becomes nearly as loud as the engine in its latter stages. 

2. Howling and squealing sound: 
In most cases, the humming is followed by a sound first described as a howl and later as a screeching.
As the wheel bearing sustains additional damage and uses up an increasing amount of its oil, it dries out. After that, the sounds are caused by an increase in the friction that exists between the inner metal parts. When you drive faster, more force is applied to the bearing, which increases noise. 

3. Clicking sound: 
When the problem has progressed to a later stage, you may hear a clicking sound from the wheel while driving. It’s not all that loud, but if you open the window while driving, you can hear it.
Initially, it sounds like a small metal ball striking the wheel, but it gets significantly more noticeable as time passes.
As was the case with the humming sound, this is easily misunderstood as a malfunctioning CV joint, for example. If this is the only symptom you are experiencing, it is essential to thoroughly examine the undercarriage to prevent making an error. 

4. Grinding sound: 
The wheel bearing has reached the end of its useful life when it begins to make a grinding sound. In most cases, this indicates that the internal components of the bearing are barely holding together and that a total failure of the bearing is on the horizon.
Even to the point where it’s possible for the bearing to become jammed, preventing the wheel from turning. There is a loud, distinctive sound similar to metal, and it sounds like bits of metal are grinding together. You should strive not to let the problem reach this point and act before the grinding begins. 

5. Steering wheel vibration: 
A faulty wheel bearing might produce vibrations in the steering wheel, particularly if the front wheels are affected. If only the rear wheel bearings are faulty, the vibration is primarily felt beneath the seats.
Unbalanced wheels typically cause steering wheel vibration; consequently, you should only investigate a faulty wheel bearing if the vibrations are accompanied by a humming or grinding sound. 

6. ABS malfunction indicator light comes up on the dashboard: 
Since the speed sensor is (in the vast majority of instances) placed within the same wheel assembly, the ABS warning light may illuminate. When the wheel bearing has reached the end of its useful life, it may wobble, leading to a fault in the ABS. 

7. Wheel wobble: 
This is one of the indications of a severely deteriorated wheel bearing. Similar to the grinding sound, if you see this symptom, you should immediately replace the wheel bearing. Since the bearing holds the entire wheel to the drive shaft, damage results in undesirable play.
This indicates that the entire wheel has undesirable play. The most typical cause of this is damage to the cage and rollers within the wheel bearing. This can be easily detected by raising the vehicle and attempting to rotate the wheel from side to side. The play will then begin. 

8. Vehicle pulls to one side
Since the wheel is practically unbalanced, you may notice that the vehicle pulls to one side in addition to the wheel wobbling. It’s very similar to when a car’s tires aren’t correctly balanced or when one of the tires isn’t inflated to the correct level. In the beginning, the pull is hardly perceptible; nevertheless, if you do not take action in time, it may pull significantly to one side. 

9. Steering wheel response: 
The fact that the wheel hub assembly on one side isn’t functioning correctly will manifest in the vehicle’s steering if the problem persists. It is possible that, rather than having the normal snappy response, it will feel somewhat delayed or as though it is putting up a bit of a battle. Overall, this is one of the negative symptoms associated with the wheel bearing, and it feels terrible. 

10. Grease marks on wheel hub, wheel rim, or hub cap: 
The last symptom on this list, greasy stains on the wheel hub or rim, is possibly the least obvious. In most cases, all of the initial symptoms are already present. Therefore you will likely not notice this. Nonetheless, if you see this, such as when changing a tire or performing an inspection, give it a second look. Make an immediate inspection if you notice thick, typically black or green, oil around the center of the wheel hub, on the inner portion of the wheel rim, or on the hubcap.
This is caused by a broken or missing seal on the bearing, which allows all lubricants to escape. Lacking lubrication, the wheel bearing will eventually become severely damaged. 

Conclusion: 
When discussing problematic wheel-bearing symptoms, it is crucial to recognize them. 

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* Wheel Bearing 
* Indian Roadie Knowledge Hub - Mechanical 

* Indian Roadie Knowledge Hub _ Technical 
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