Why does it squeak after replacing the brake pads?
2 Answers
After replacing the brake pads, the squeaking noise occurs because there is a break-in period required between the brake pads and the brake disc, typically around 5,000 kilometers. If the noise persists, it is necessary to check whether the brake pad material is too hard, which may be causing the issue. Additionally, the noise could be due to improper clearance between the brake pads and the brake disc or incorrect installation. The braking system works by utilizing the principle of friction between the brake pads and the wheel hub or disc to convert the kinetic energy of the moving vehicle into heat energy, thereby achieving braking. Based on the method of operation, brakes are categorized into drum brakes and disc brakes. Drum brakes use stationary brake shoes inside the brake drum to create friction against the drum, reducing the wheel's rotational speed. Disc brakes, on the other hand, use a caliper to control two brake pads that clamp onto the brake disc attached to the wheel, creating friction to stop the vehicle.
It's really annoying when the brakes squeak right after changing the pads. This is usually because the new brake pads haven't fully broken in yet. After all, their surface is still a bit rough and needs to run for about a hundred kilometers to smoothly conform to the old brake discs. Otherwise, they'll keep making noise like this. I remember the first time I encountered this, I thought I'd messed something up, but my friend said it's completely normal—just like new shoes that rub at first, you need to step on the brakes more and take them for a spin on the highway. Another possibility is that the installation wasn't done cleanly, with dust or small particles stuck between the pads and discs, creating noise. Or, the brake discs might be unevenly worn, making the new and old parts incompatible. If the noise is too loud or doesn't go away, head back to the repair shop to check the calipers or disc surface for flatness issues. Don't let it waste fuel or compromise safety, and don't slack on regular maintenance either.