Brakes being "glazed" refers to a condition where the brake pads (and sometimes the brake rotors or drums) experience excessive heat and develop a shiny, smooth surface. This glazing occurs due to prolonged exposure to high temperatures, which can happen for several reasons, including:
Overheating: This can be caused by frequent hard braking, riding the brakes (keeping your foot on the brake pedal while driving), or driving down steep hills without downshifting.
Poor Material Quality: Low-quality brake pads may not be designed to withstand high heat, leading to quicker glazing.
Improper Installation: If brake components are not installed correctly, it can lead to uneven wear or overheating.
Incorrect Brake Adjustment: If the brakes are not properly adjusted, they may drag, causing additional heat buildup.
- Frequent Short Trips: Short trips can prevent the brakes from reaching optimal operating temperature, leading to buildup of contaminants which can cause glazing over time.
Symptoms of Glazed Brakes
- Squeaking or Squealing Sounds: Glazed brake pads often produce noise when used, particularly when the pads are new or when there’s moisture.
- Poor Braking Performance: The brakes may feel less responsive or require a longer distance to stop.
- Vibration: You may feel a pulsing or vibration through the brake pedal when applying the brakes.
- Heat: You may notice that the brakes are excessively hot to the touch after driving, particularly following heavy use.
Consequences of Glazed Brakes
Reduced Stopping Power: Glazed brakes can significantly reduce the effectiveness of the braking system, increasing stopping distances and creating safety concerns.
Increased Wear: Glazing can cause uneven wear and tear on brake pads and rotors or drums, potentially leading to the need for more frequent replacements.
- Brake Fade: Prolonged glazing can lead to brake fade, where the brakes lose effectiveness when overheated, especially during prolonged periods of heavy braking.
Remedies for Glazed Brakes
Inspection and Replacement: If brakes are glazed, inspecting the entire braking system is recommended, including the pads and rotors. Glazed pads should be replaced.
Resurfacing: In some cases, rotors can be resurfaced to remove the glazed layer and restore proper function.
Improved Driving Habits: Avoiding heavy braking whenever possible and using engine braking (downshifting) on steep declines can help reduce the likelihood of glazing.
- Higher Quality Components: Using higher quality brake pads and ensuring they are properly installed can help withstand heat better and prevent glazing.
In summary, glazed brakes are a sign of excessive heat and improper brake function, leading to decreased performance and safety issues. Regular maintenance and attention to driving habits can help prevent this condition.