What Causes the Squealing Noise When Braking Hard?
2 Answers
The causes of squealing noise when braking hard are as follows: 1. Metal hard spots on brake pads: Brake pads may contain small metal particles inside. Light braking can produce sharp, piercing sounds. This issue can be resolved by stomping on the brakes several times, removing and resurfacing the brake pads, or replacing them with higher-quality ones. 2. Severely worn brake pads triggering the warning indicator: Brake pads usually have wear indicators. When the pads wear down to their limit, the indicator scrapes against the brake disc, producing a sharp metallic grinding noise. In this case, the brake pads must be replaced immediately to avoid damaging the brake disc and potential brake failure.
Last time I encountered squealing during emergency braking, I found out the brake pads were nearly worn out. Usually, the friction between the metal shims and the brake discs produces that sharp sound, especially under the greater pressure of emergency braking. Additionally, if the brake discs are rusty or have sand particles stuck to them, they can also cause such noises, which is particularly common after rainy days. Sometimes, misaligned brake calipers can lead to unusual sounds, and this requires adjustment by a professional mechanic. In any case, if there's any abnormal noise during emergency braking, it's crucial to get it checked immediately since it concerns safety. It's best not to delay—last time I procrastinated, and ended up having to replace the entire brake disc, costing me a lot more unnecessary money. Regular brake maintenance is also important, like checking the thickness periodically.
