Maybe it’s coming from under the hood, or perhaps it sounds like a backfire from the car’s rear. Those unexpected noises can tell you quite a bit about what’s wrong with your car. Some of these noises might be completely harmless, while others indicate that it’s time to visit the mechanic. Here’s a look at some of the most common car noises and what they mean:
- Clicking when you start the car: This sound is the starter trying to connect the battery to the alternator, to initiate the electrical systems in the car. It could mean the battery is dead, or that it’s time for a new alternator.
- Squeaking and groaning around corners: These sounds are usually emitted from the steering linkage. A low hum or groan that sounds like it’s coming from the steering wheel may mean you need more power steering fluid, as well.
- Clunking when you brake: This noise occurs when a brake caliper isn’t catching properly. It may sometimes be accompanied by screeching or squeaking during braking.
- Sizzling or hissing from under the hood: That’s the sound of liquid leaking and landing on a hot car part. Check under your car to see if any fluid is on the ground, and look under the hood for signs of leaks.
- Knocking from under the hood: Usually this sound happens because of either low-quality fuel, or because the fuel used is a higher octane than what the vehicle was built for. Eliminate it by getting gas from reputable stations and following manufacturer’s recommendations for fuel octane levels.
- Backfiring: Resembling the sound of a gunshot, a backfire happens when the air-fuel mixture isn’t quite right, or if the catalytic converter isn’t functioning properly.
- Humming or whirring: These sounds might indicate a variety of problems, including a faulty wheel bearing, a failing transmission, or a differential that needs lubricant.
- Popping from the engine: Low oil, a clogged fuel filter, and other minor problems can cause this sound. The same problems may cause a lighter tapping noise.
Check out Car Talk’s comprehensive guide to car sounds for more information. And remember that some of these sounds are great warning signs. When you hear strange noises under the hood, visit a mechanic to diagnose the problem and get the appropriate repairs.
