What Causes the Collision Sound Between Brake Pads and Calipers?

[StAlejandro]

The reasons for the collision sound between brake pads and calipers are: 1. Loose bolts in the chassis and suspension; 2. The caliper's return pin has not retracted; 3. The brake cylinder's piston has not retracted. Automotive brake pads, also known as brake linings, refer to the friction materials fixed on the rotating brake drums or discs of the wheels. The friction linings and blocks bear external pressure to generate friction, thereby achieving the purpose of vehicle deceleration. Methods to maintain brake pads include: 1. Developing good driving habits; 2. Avoiding sudden braking; 3. Regularly inspecting brake pads and discs; 4. Checking the thickness of the friction linings; 5. Having a professional inspect the brake shoes; 6. Using original manufacturer-provided brake pads for replacements.

[CalebDella]

When I encounter a rattling noise between the brake pads and calipers during car repairs, I usually first check if they are loose or unevenly worn. Aged or broken brake pad retaining springs can cause them to wobble and hit the calipers, producing a clicking sound; lack of lubrication on the caliper slide pins can also cause them to seize, leading to metal-on-metal friction. Dust buildup or small stones stuck in the gaps are equally common, resulting in noise while driving. Ignoring these sounds may accelerate component wear, compromise braking performance, and even pose safety risks. I always recommend first cleaning the caliper area and lubricating key points—if the noise persists, parts replacement is necessary. Prevention is better than cure, and regular brake system maintenance can significantly reduce such issues.

[LeilaFitz]

When I drove my old car, I encountered a brake rattling noise. At first, I didn't pay much attention, but later I found out it was because the brake pads were too thin and wobbling. Rusted caliper pistons can also easily get stuck, producing a metal clashing sound when braking hard. In daily driving, checking brake pad thickness is simple and easy—replace them if they're too thin. Also, loose caliper bracket bolts can cause issues. I remember the sound being more noticeable in summer due to thermal expansion and contraction—don't wait until a major problem occurs. I bought tools and fixed it myself back then, but beginners should seek help to avoid mistakes.

[VonHazel]

The clanking sound between brake pads and calipers is annoying, but more critically, it may indicate safety hazards. For instance, loose components can interfere with performance during emergency braking, increasing accident risks. Long-term neglect of such noises may lead to caliper deformation and brake disc damage, resulting in costlier repairs. I've found the causes are often installation errors or natural wear, like spring fatigue. Promptly stopping to inspect or visiting a professional shop is crucial. Safety first—don't wait until the abnormal noise worsens to take action.