Most cars have little quirks that we learn to live with.
This is reasonable when it entails a broken cup holder or a temperamental radio.
But when it comes to car noises, be careful not to shrug off the warning signs of a big problem – especially if you are about to purchase the vehicle.
Here are 7 car noises you shouldn’t ignore.
1. Clicking when turning
A clicking noise when your car turns is often a sign that the outer Constant Velocity (CV) joint is on its last legs. The CV joint is an important ball bearing that that sits at the outer and inner ends of the axle. The joint is usually protected by a rubber boot, which also contains the grease that lubricates the ball bearings. Over time, the boot can dry out, and eventually crack. This causes the CV Joint to lose lubrication and become compromised by dirt and other contaminants. Eventually, a clicking noise results as you turn the steering wheel, which becomes louder as the CV joint is damaged more and more.
2. High pitched squealing while accelerating
High pitched noises as your car accelerates are usually associated with a compromised engine belt. If the noise is constant, it’s likely that you have a cracked, dry belt that needs replacement. However, if your car only squeals in the morning or when there is moisture in the air, it is likely a simpler case of belt readjustment.
3. Metallic screeching
A metallic squealing noise is often a sign that your brake pads have reached their minimum thickness, and are no longer roadworthy. The noise itself isn’t anything to worry about: pads are fitted with wear indicators designed to make tell you that it is time for replacement. Nonetheless, it’s time to get to the mechanic straight away.
4. Brake clunking
If your car makes a clunking noise when the brake pedal is compressed, it is likely that the brake caliper is damaged or incorrectly installed. This issue needs to be dealt with immediately: the brake calipers play an essential role through slowing the car’s wheels by creating friction against the rotors. Failing calipers represent a major safety hazard.
5. Hissing under the bonnet
If you hear a sound similar to that of butter in a fry pan when you switch off your car, it is likely that a fluid in your engine is leaking. Check the vacuum line, coolant and oil levels – there’s every chance that liquid is escaping to the exhausting manifold. And if in doubt, head to the mechanic, or have one come to you!
6. Tapping or clicking under the hood
The most common reason for a tapping engine noise is low oil. The oil in your engine lubricates the spaces between parts, so if it is running low they are more likely to collide. If the noise persists after you top up your oil, it may also indicate a valve train problem, which controls air and fuel intake, allowing your engine to burn fuel.
