What Causes Poor Braking After Replacing Brake Pads?
4 Answers
Poor braking after replacing brake pads occurs because the surface of the new brake pads is relatively flat, while the contact surface on the brake disc is very uneven. This results in a very small contact area between them. Additionally, when the brakes are applied, the brake pads undergo significant deformation, leading to what is known as poor braking. Here is some relevant information: 1. Generally, new brake pads require a break-in period of 200 kilometers to achieve optimal braking performance. Therefore, vehicles with newly replaced brake pads should be driven cautiously. 2. Break-in method for new brake pads: After installing new brake pads, find a road with good conditions, accelerate to 100 km/h, then gently apply the brakes to reduce the speed to around 10-20 km/h. Then, release the brakes and drive for about 5 kilometers to allow the brake pads to cool slightly. Repeat this process approximately 10 times.
I just changed my new brake pads but they don't stop the car well. Common reasons include the new brake pads being too smooth and needing a break-in period. Drive slowly for the first few days and brake gently to wear the surface and improve friction. Additionally, if the screws weren't tightened properly during installation, it can cause gaps and weak braking force, requiring re-tightening. If air enters the brake system, the force distribution becomes uneven; try bleeding the air or adding brake fluid to fix this. For safety, if the brakes aren't working properly, stop and check immediately instead of forcing it to avoid accidents. It's recommended to have them installed by a professional shop to ensure everything is done correctly the first time and avoid repeated issues.
After changing the brake pads, I noticed the deceleration became slower. After checking, I found that improper bedding-in of the new pads is a major factor – it takes a few hundred kilometers for the surface to wear in properly. Installation issues shouldn't be overlooked either; things like reversed shims or loose screws can affect performance, while insufficient brake fluid or air bubbles can also cause a spongy feel. I learned this through personal experience. Now I remind myself to always do a low-speed test drive after replacing parts to confirm everything works normally before hitting the road – safety first, never be careless.
After replacing brake pads, poor braking performance is usually due to the smooth surface of new pads needing wear-in. Possible improper installation, such as excessive gap reducing friction, or air in the brake system causing force dispersion. Check oil level and part compatibility; avoid using low-quality parts. Performance will improve after break-in; remain calm and handle normally.
