What to Do If the Car Still Makes a Humming Noise After Replacing the Bearing?
3 Answers
The solution to the car still making a humming noise after replacing the bearing is: Remove the drive belt connected to the crankshaft, generator, compressor, power steering pump, etc., on the engine. If the noise disappears after starting the car, turn off the engine and manually rotate or shake those drive components to see which one is loose or making abnormal noises. The functions of the bearing are: 1. To ensure that the shock absorber can rotate with the wheel when the vehicle is turning, maintaining steering flexibility; 2. The outer ring of the pressure bearing is made of rubber, which maintains a soft connection between the body and the shock absorber, preventing vibrations from uneven road surfaces from being transmitted to the body through the shock absorber while driving.
I frequently do car repairs, but even after replacing the bearings, there's still a humming noise. This issue needs careful inspection. It's possible the bearings weren't installed properly—some shops lack the skill, resulting in loose installation or insufficient grease, causing the noise to persist. Tire issues are another common factor; uneven wear or incorrect tire pressure can cause humming when rotating. The drivetrain could also be the culprit, such as a damaged half-shaft or differential failure, where the noise changes during acceleration or deceleration. I recommend test-driving at different speeds to pinpoint whether the sound comes from the front or rear wheels, then check the tire condition. If DIY is too challenging, have a skilled mechanic recheck the bearings and surrounding components. Don't delay too long, as it could lead to bigger damage, like wheel hub deformation or brake failure. Spending a little now on repairs can save major trouble later.
The humming noise persists even after replacing the bearings, and I don't mean to alarm you, but this could indicate a hidden safety hazard. With years of driving experience, I've encountered similar issues where the problem often lies with other components, such as a faulty wheel speed sensor or warped brake discs, which can cause noise and affect handling. Especially at high speeds, the humming may intensify vibrations, increasing the risk of an accident. It's advisable to immediately pull over and check the source of the noise or head straight to a 4S dealership for expert diagnosis. They can use professional tools to detect issues like loose suspension or problems with the exhaust system. Safety should always come first—don't take chances or delay, as procrastination might lead to more expensive repairs later.
