What Causes the Clicking Sound When Pressing and Releasing the Brake Pedal?
3 Answers
There are generally two reasons: one is the friction between the wheel and the braking system, and the other is rust between the brake disc and brake pads, which causes noise due to rust friction. Below is relevant information about brakes: 1. Definition: Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transportation tools, or machinery. The general principle of braking is to fix a wheel or disc on the high-speed shaft of the machine and install corresponding brake shoes, bands, or discs on the machine base, which generate braking torque under external force. The braking device is a mechanical braking device that can slow down the vehicle, also known as a decelerator. 2. Classification: Braking is divided into emergency braking and daily braking. During emergency braking, be aware of the risk of rear-end collisions.
I've encountered this situation before, the sound is like something is stuck. It's mainly an issue with the braking system. For example, lack of lubrication on the guide pins can cause the brake caliper to not retract smoothly, resulting in a clunking sound when pressing and releasing the brake pedal. When brake pads wear down to their limit, the metal backing plate will rub against the brake disc, making a very noticeable noise. Sometimes it's because the retaining clip wasn't installed properly or has come loose, causing a clunk with every brake application. Aging stabilizer bar bushings in the suspension can also cause this, especially when braking during turns. First, check the thickness of the brake pads. If they haven't reached their limit yet, promptly service the guide pins - applying some special lubricant usually solves the problem.
This type of fault is common during car repairs. The knocking sound mostly comes from the brake caliper. Insufficient lubrication of the guide pins is the most common cause, and these need regular maintenance. If the heat dissipation fins on the back of the brake pads are deformed, they can also produce abnormal noises. Additionally, check if there are raised edges on the brake disc; if there are ridges, the disc should be resurfaced when replacing the brake pads. It's also worth checking for cracked or dry ball joint boots, especially if the lower control arm bushings are damaged, as they can cause knocking sounds when braking force changes. It's recommended to first remove the tire to check if the caliper moves smoothly and ensure all necessary lubrication points are properly greased.
