Suivels Auto / Symptoms / 05
Strange noises
Noise is useful information. When it happens matters more than what it sounds like, so the most useful thing you can tell us is what the car was doing at the time.
When does it happen
- Only when braking
- Almost always brakes. See the brakes page for what the different sounds mean.
- Changes with road speed, not engine speed
- Wheel bearings, tyres, or driveline. A bearing hum often changes when you steer gently left and right.
- Changes with engine speed in neutral
- Engine ancillaries: belt, tensioner, pulleys, alternator or water pump bearings.
- Only over bumps
- Suspension. Worn bushings, drop links, struts or top mounts. Usually a clunk or a knock rather than a continuous noise.
- Only when turning
- CV joints on front-wheel drive commonly click when turning under load. Power steering can whine.
- Only on cold start, then fades
- Often a belt or tensioner, sometimes normal expansion noise. Worth mentioning but rarely urgent.
- Knocking that follows engine RPM
- Take this one seriously. Internal engine noise needs attention promptly.
What usually causes it
Brakes
The most common source of new noises, and the easiest to check.
Wheel bearings
Typically a hum or growl that rises with speed. They give a long warning but should not be left indefinitely.
Suspension components
Bushings, links and mounts wear gradually. Usually a comfort and handling issue before it is a safety one, though not always.
Belt and tensioner
Squeal or chirp, often worst when cold or wet. Cheap to address, and a snapped belt can leave you without charging or water-pump drive.
Exhaust
Blowing joints and failed mountings. Rattles and drones. Worth checking for the fumes risk as much as the noise.
Tyres
Uneven or feathered wear generates road noise that is easy to mistake for a bearing.
Why this still needs a proper look
Noise is the symptom most often misdiagnosed, because sound travels through a car and the ear is bad at locating it. What sounds like the front left can be the rear right. Confirming it usually means driving the vehicle, getting it off the ground, and checking components under load rather than replacing the part that seems most likely.
Get it checked
We come to the car.
Tell us what it is doing and where it is. We work at your home, your job, or the roadside across DC, Maryland and Northern Virginia.
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