At a Glance
- A warped rotor will cause the brake pedal and steering wheel to vibrate when braking.
- By following the steps outlined in this guide, you can accurately determine which brake rotor is warped and take appropriate action to repair or replace it.
- It is recommended to inspect your brake rotors every 10,000-15,000 miles or as needed if you experience any symptoms of warped rotors.
Warped brake rotors can lead to a range of driving issues, including vibration, noise, and reduced braking performance. Identifying the affected rotor is crucial for effective repair. This comprehensive guide will provide you with step-by-step instructions on how to tell which brake rotor is warped.
Symptoms of Warped Brake Rotors
- Vibration during braking: A warped rotor will cause the brake pedal and steering wheel to vibrate when braking.
- Pulsation in the brake pedal: As the warped rotor rotates, it will cause the brake pedal to pulsate.
- Noise when braking: Warped rotors can produce a grinding, squealing, or chattering noise during braking.
- Reduced braking performance: Warped rotors can reduce the effectiveness of your brakes, increasing stopping distances.
How to Inspect Brake Rotors for Warping
1. Visual Inspection
- Remove the wheel to expose the brake rotor.
- Look for uneven wear patterns on the rotor surface, such as grooves or ridges.
- Check for any discoloration or heat spots on the rotor, which can indicate warping.
2. Dial Indicator Test
- Use a dial indicator to measure the runout of the rotor.
- Place the tip of the dial indicator on the rotor surface and rotate the rotor.
- If the dial indicator reading exceeds 0.005 inches, the rotor is warped.
3. Straight Edge Test
- Place a straight edge across the rotor surface.
- Check for any gaps between the straight edge and the rotor.
- If a gap is greater than 0.005 inches, the rotor is warped.
Which Brake Rotor is Warped?
- Front Rotors: Warped front rotors will cause vibration in the steering wheel and brake pedal.
- Rear Rotors: Warped rear rotors will typically cause vibration in the rear of the vehicle.
- Lateral Runout: This type of warping occurs when the rotor wobbles from side to side. It can be detected using a dial indicator or straight edge test.
- Concentric Runout: This type of warping occurs when the rotor surface is uneven. It can be detected visually or by using a dial indicator.
When to Replace Warped Brake Rotors
Warped brake rotors should be replaced as soon as possible to prevent further damage to the braking system. If left unrepaired, warped rotors can lead to:
- Reduced braking performance
- Increased stopping distances
- Safety hazards
- Damage to other brake components
Repairing Warped Brake Rotors
Warped brake rotors can be repaired by resurfacing or replacing them.
- Resurfacing: This involves removing a small amount of material from the rotor surface to smooth out the unevenness.
- Replacement: If the rotors are severely warped or damaged, they will need to be replaced.
Key Points
Identifying warped brake rotors is essential for maintaining a safe and efficient braking system. By following the steps outlined in this guide, you can accurately determine which brake rotor is warped and take appropriate action to repair or replace it.
Basics You Wanted To Know
Q: Can I drive with warped brake rotors?
A: Yes, but it is not recommended. Warped rotors can reduce braking performance and increase stopping distances.
Q: How long does it take to resurface brake rotors?
A: Resurfacing brake rotors typically takes about 30-60 minutes per rotor.
Q: How often should I inspect my brake rotors?
A: It is recommended to inspect your brake rotors every 10,000-15,000 miles or as needed if you experience any symptoms of warped rotors.
