What Causes the Protrusion Around the Brake Disc?

[DiHector]

The protrusion around the brake disc is due to severe wear of the brake disc. The braking system is crucial for a vehicle as it directly impacts driving safety and stability. A car's braking system mainly consists of brake pads, brake discs, brake linings, vacuum boosters, master cylinders, and wheel cylinders. The brake fluid in the braking system requires regular replacement. Brake fluid is highly hygroscopic, and excessive water content can lead to reduced braking force and extended stopping distances, compromising safety. Once the brake fluid's water content reaches 3%, it must be replaced immediately.

[VonCaleb]

As someone who has lived by the sea for over a decade, I've encountered the annoying issue of raised edges around brake discs all too often, mainly due to the high humidity. When the car is parked for extended periods, the disc surfaces easily rust and corrode, with rust gradually building up to form raised edges. Additionally, occasional hard braking causes thermal expansion and contraction, leading to disc warping. Poor daily maintenance, such as not rinsing promptly after rain, allows salt and grime to accelerate corrosion. Long-term neglect can result in steering wheel vibrations during braking, even compromising safety. I believe proactive prevention is key—I make it a habit to rinse the brake areas during every car wash and opt for rust-resistant materials when replacing brake pads. Though it's a bit of a hassle, it saves me from costly repairs down the line.

[SanArthur]

As someone who enjoys DIY car maintenance, I found the root cause of brake disc warping is quite simple: excessive hard braking causes heat buildup that deforms the material; or when brake pads wear unevenly, their uneven surfaces push against the disc creating raised spots; sometimes improper caliper installation with loose bolts makes the disc wobble. The solution isn't just replacing discs - always check pad compatibility by feeling the edges, minor warping can be fixed by resurfacing during maintenance, but severe cases require full replacement for safety. Adopting smoother driving habits with less aggressive braking significantly extends disc and pad lifespan.

[LeJune]

When I was a newbie driver, I didn't understand what brake disc warping meant until the mechanic explained it: mainly caused by rust buildup from parking in damp locations or overheating deformation from hard braking after highway driving; these warps can make the brake pedal vibrate intensely. It's recommended to learn more basic maintenance like me, such as washing and drying the disc area after rain to effectively prevent rust; if the warping gets severe, replace the disc pads as soon as possible, otherwise ineffective braking can be terrifying.