A faulty wheel bearing can make different types of sounds all depending on how bad it really is.
Typically, when they first start to fail, a defective wheel bearing will make a sound somewhat like a whine, hum or a low whirring noise. As the condition on the bearing deteriorates, the sound will usually get louder. Again, depending on the condition, the noise could escalate to a steady moaning noise and even become a grinding type noise.
Understand that front end noises can also be caused by suspension parts or CV joints. For that reason you should take the time to have the wheel bearings checked.
The check is pretty simple in most cases. With the wheels off the ground, grabbing the wheel at the top and bottom and rocking it back and forth is the easiest way to check for ‘play’ in the bearing. Any play will require your attention.
It’s important to mention that the center hub of the wheel should not move with the wheel. If there is movement in the hub, noises could be from other suspension parts or joints.
What’s involved with replacing a sealed wheel bearing and hub assembly?
Replacing a sealed wheel bearing and hub assembly involves removing the wheel, hub nut and brakes to replace the unit.
On installation, it’s important to use a torque wrench to tighten all bolts and nuts to specifications. Impact tools should not be used.