Overview
- The damaged bearing may cause the wheel to wobble or pull to one side, reducing the effectiveness of the brakes.
- If one tire shows significant wear compared to the others, it could be an indication of a wheel bearing problem.
- If you suspect that a wheel bearing may be going out, it is crucial to have it inspected and repaired promptly by a qualified mechanic.
Wheel bearings play a crucial role in ensuring smooth and safe vehicle operation. They allow the wheels to rotate freely while supporting the vehicle’s weight. However, over time, wheel bearings can wear out or become damaged, leading to various problems. Knowing how to tell if a wheel bearing is going out is essential for prompt diagnosis and repair, preventing further damage or accidents.
Symptoms of a Failing Wheel Bearing
1. Grinding or Humming Noise
One of the most common symptoms of a failing wheel bearing is an audible grinding or humming noise. The noise typically occurs when the vehicle is in motion and increases in volume as the speed increases. It may also be more pronounced when turning or applying pressure to the affected wheel.
2. Excessive Vibration
Another telltale sign of a bad wheel bearing is excessive vibration. This vibration can be felt through the steering wheel, floorboard, or seat. It may worsen with increasing speed or when applying pressure to the affected wheel.
3. Loose or Wobbly Wheel
A failing wheel bearing can cause the wheel to become loose or wobbly. This can be checked by attempting to rock the wheel back and forth. Excessive play or movement indicates a potential wheel bearing issue.
4. Uneven Tire Wear
If a wheel bearing is not functioning properly, it can cause uneven tire wear. The tire on the affected side may show signs of excessive or irregular wear, such as cupping or scalloping.
5. Increased Fuel Consumption
A failing wheel bearing can increase rolling resistance, leading to increased fuel consumption. This is because the damaged bearing creates additional friction, causing the engine to work harder to maintain the same speed.
6. Reduced Braking Efficiency
In some cases, a failing wheel bearing can affect braking efficiency. The damaged bearing may cause the wheel to wobble or pull to one side, reducing the effectiveness of the brakes.
7. ABS or Traction Control Malfunction
A wheel bearing malfunction can also trigger false ABS or traction control activations. The damaged bearing can cause the wheel speed sensor to send inaccurate signals, leading to intermittent or unnecessary activation of these systems.
How to Test for a Bad Wheel Bearing
1. Jacking Up the Vehicle
To test for a bad wheel bearing, safely jack up the vehicle and secure it with jack stands.
2. Grasping the Wheel
Grasp the wheel firmly at the top and bottom and try to shake it back and forth. If there is excessive play or movement, it may indicate a bad wheel bearing.
3. Spinning the Wheel
Spin the wheel by hand and listen for any grinding or humming noises. If you hear any unusual sounds, it may be a sign of a failing wheel bearing.
4. Checking the Tire
Inspect the tires for any signs of uneven or excessive wear. If one tire shows significant wear compared to the others, it could be an indication of a wheel bearing problem.
5. Using a Stethoscope
A mechanic’s stethoscope can be used to pinpoint the source of any noises. Place the stethoscope on various parts of the suspension, including the wheel bearing, and listen for any abnormal sounds.
Replacing a Wheel Bearing
Replacing a wheel bearing is a complex task that should be performed by a qualified mechanic. It involves removing the wheel, brake caliper, and rotor, as well as pressing out the old bearing and installing the new one.
Key Points: Don’t Ignore the Signs
Ignoring the signs of a failing wheel bearing can lead to further damage, increased repair costs, and safety hazards. If you suspect that a wheel bearing may be going out, it is crucial to have it inspected and repaired promptly by a qualified mechanic. By understanding the symptoms and testing methods described in this guide, you can help ensure the safety and reliability of your vehicle.
Basics You Wanted To Know
Q: How long do wheel bearings typically last?
A: Wheel bearing lifespan varies depending on driving conditions and vehicle usage. Generally, they can last anywhere from 50,000 to 100,000 miles.
Q: Can I drive with a bad wheel bearing?
A: Driving with a bad wheel bearing is not recommended. It can lead to further damage to the bearing, the wheel, and other components. It can also affect vehicle handling and safety.
Q: How much does it cost to replace a wheel bearing?
A: The cost of replacing a wheel bearing varies depending on the vehicle and the location of the bearing. On average, it can range from $200 to $500 per wheel.