What Causes a Clicking Sound When Releasing the Brake?
3 Answers
It may be caused by the brake disc and brake pads sticking together due to rust, resulting in abnormal noise. Below are the relevant explanations: 1. Brake Disc: Simply put, a brake disc is a round disc that rotates synchronously with the vehicle's movement. The brake caliper clamps the brake disc to generate braking force. When the brake is applied, it clamps the brake disc to slow down or stop the vehicle. Brake discs offer effective braking performance and are easier to maintain compared to drum brakes. 2. Brake Pads: Also known as brake linings, automotive brake pads are friction materials fixed on the rotating brake drum or brake disc of the wheel. The friction linings and blocks bear external pressure, creating friction to slow down the vehicle.
Let me tell you as an experienced driver, if you hear a clunking sound when releasing the brake, it's probably because the brake pads have some play in the caliper bracket. This clearance is intentionally designed by manufacturers to accommodate thermal expansion of the brake components. It's especially noticeable during rainy days or after the car has been parked for a while. Another common cause is worn suspension bushings - when you release the brake, the chassis components shift position causing a thud, particularly in older vehicles. My decade-old car had this issue, and the mechanic found leaking fluid in the lower control arm bushings. Loose tie rod ends or worn stabilizer bar bushings could also be culprits. If the noise appears right after brake pad replacement, it might be improper installation where the pads aren't seated correctly. Remember, if you feel a slight rebound in the brake pedal when releasing it, that's usually the telltale sign.
Don't worry! My little POLO makes a clunking sound when releasing the brake during cold starts. The mechanic said it's normal clearance movement between the brake pads and calipers. It's like when frozen fingers suddenly move and make a click sound, especially noticeable after sitting overnight in winter. Two key differences to note: if it doesn't happen when the engine's warm, it's generally fine; if it persists when warm, check the suspension. I've specifically observed that if the steering ball joint is loose, releasing brakes during slow turns will definitely cause noise. If the underbody guard's screws are loose or it's rubbing against the exhaust pipe, there'll be a clang when releasing the brake. Last time at the dealership, I saw a Tiguan with exactly this issue. The key is identifying the sound's origin: noise from wheel areas usually indicates brake pad issues, while mid-underbody sounds warrant priority inspection of exhaust pipe hangers!
