8 Possible Causes Of Grinding Noises When Braking

Sometimes, your car makes grinding noise when braking. It’s a warning sign telling you that there’s something wrong either with the brakes or the rotors. Many car owners like to ignore such sounds for fear of an extensive repair. Well, you shouldn’t do this mistake! Ignore your automobile’s moans and groans and it may cost a fortune to repair down the road.

The Causes Of Grinding Noise When Braking

All the parts and components of a vehicle are supposed to fail or wear out at some point. However, what is important is to identify the problems before these become serious. So, find out the causes of brake noises and take the car to the repair shop if necessary.

Brakes Making Grinding Noise

1. Worn-out Brake Pads

Worn-out brake pads are one of the reason making grinding noise when braking. If your brake pads are used for quite a long time, the backing plates will gradually lose its material. This causes metal touching other metal, resulting in squeaking noises. Besides, the rotor can also rub the caliper and scrape its meal surface. Thus, if you do not replace the pads immediately, your brakes will be severely broken. Moreover, the backing plate and the caliper will destroy each other, causing grooves and damage.

2. Low-Quality Brake Pads

Many people think buying a low-quality pads is a good way to save some bucks. But actually it’s a wrong decision. The poor quality brake pads often contain metal chunks, which will rub and scrape on the surface of the rotor, causing heavy damages. So if you are planning to replace the pads, choose good products from a renowned brand.

3. Objects Between Rotor And Caliper

It’s normal for the components to catch dirt, dust, and grime. However, sometimes small rocks or other solid objects from the road can between the caliper and rotor and create brakes grinding noise whether you push the brake or not. The frictions created from such an object can damage these parts.

4. Broken Shims

Another reason responsible for the grinding noise when braking is  broken shims. A worn-out shim will make a contact with a piece of the braking system, such as the rotor. When metal comes together with other metal like this, they will create a grinding sound from your braking system.

So anytime you get a brake job done, you must replace the shims. Sometimes, your mechanic may avoid this as they want to do their job rapidly, so make sure that they do replace them for you.

5. Not Driving The Car Often

It’s another reason your car is making grinding noise when braking. OEM brake pads have an average lifespan of 20,000 km. Nonetheless, they may not last that much longer for some reasons. One probable cause is leaving the automobile in your garage for weeks. Idleness and bad weather can cause the forming of rust and corrosion on the rotors. It that case, the rust will spread to other parts too and destroy them. You should drive the car regularly, at least for a while, to avoid this problem.

6. Worn-out Rotor Discs

Worn-out rotor discs cause grinding noises when braking.
Worn-out rotor discs cause grinding noises when braking.

Worn-out rotor discs are possible culprit creating annoying noises from the braking system. Rotor discs that aren’t flat will cause squeaking sounds. Rotor discs that are too worn-out will create scraping sounds instead. Moreover, worn-out rotors will cause a lot of vibrations from the braking system. These vibrations come at irregular forms and you can easily feel them through the brake pedal. This case is less popular than the first one.

7. Faulty Wheel Bearing

If you hear the grinding noises from your wheels or observe vibrations which alternate from quiet to loud, then you may have a worn-out or damaged wheel bearing. So check the wheel bearings carefully and replace them if needed to get rid of annoying sounds.

8. Un-lubricated Caliper Bolts

Caliper bolts will make grinding sound when braking if they are lack of lubrication. This case is rarely occur, but it could. A auto mechanic will automatically replace new caliper bolts for you during his repair work.

Vehicles can make various sounds and some are normal and harmless. Nonetheless, you should never turn a deaf ear to grinding noise when braking because it could endanger your safety! The car has to generate plenty of heat energy through friction every time you push the brake pedal. As a result, the brake pads can wear out over time, causing the damage of rotor and caliper and the brakes to fail. Faulty brakes are never good news because it may lead to major accidents. So, ignoring brakes grinding will only make the problems worse.

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