Excessive brake runout in a disc can lead to uneven braking performance, resulting in vibrations or pulsations felt in the brake pedal during use. This can cause premature wear on brake components, including pads and rotors, ultimately reducing their lifespan. Additionally, it may compromise vehicle safety by affecting the ability to stop effectively, increasing the risk of accidents. Regular inspection and maintenance are essential to mitigate these issues.
worn thin
A disc brake rotor with excessive run out is a warped rotor which causes a pulsation in the brake pedal when the brakes are applied. A certain amount of run out is acceptable.
A symptom of excessive brake disc run-out is a pulsating or vibration felt in the brake pedal when braking. This can occur due to uneven wear or warping of the brake discs, leading to inconsistent contact with the brake pads. Additionally, drivers may notice a squeaking or grinding noise during braking, indicating a potential issue with the braking system.
Brake disc failure can be caused by several factors, including excessive heat from prolonged braking, which can lead to warping or cracking. Poor-quality materials or manufacturing defects may also contribute to premature wear or failure. Additionally, corrosion from road salts or moisture can weaken the disc, while improper installation or maintenance can exacerbate these issues. Regular inspections and adhering to manufacturer guidelines can help prevent brake disc failure.
With rear drum brake:-The brake drum may be out of round or may have a rust spot in it. -The brake drum may be cracked.With rear disc brake:-The brake disc may have extreme lateral runout or be mounted improperly. -The brake disc may be cracked. This would be dangerous-Combination of soft brake pads and a directional finish on the disc surface. A directional finish may go away with use and take the noise with it.Regardless of brake type:A brake disc or drum mounted to a bent hub flange or bent axle shaft can cause this noise.
If the front brake caliper is sticking, the disc may be uneven. Brakes that are left to scrape on the disc for a long time before they are changed will damage the disc enough to cause sticking or slipping.
disc brake components
The rotor is the disc in the disc brake system.
If the front brake caliper is sticking, the disc may be uneven. Brakes that are left to scrape on the disc for a long time before they are changed will damage the disc enough to cause sticking or slipping.
Your brake pads may need replacing, the disc or drum may be warped or cracked, the caliper may need replacing, especially if there is metal on metal friction. Floating caliper (single piston) designs are subject to failure due to sticking which can occur due to dirt or corrosion if the vehicle is not operated regularly. This can cause the pad attached to the caliper to rub on the disc when the brake is released. This can reduce fuel effiency and cause excessive wear on the affected pad. Additional heat generated by the constantly rubbing pad can lead to warping of the disc also.
A frozen brake caliper or if you just instaled new brakes and rotors you might have oil on the rotors as they need to be clean before installing.
A disc brake kit is used to convert an older automobile's drum brakes to disc brakes. Your 2001 Gallant already has disc brakes. It would not require the disc conversion kit. When you begin to hear your brakes squeaking it is time to take your car to the repair shop for new brake pads.