How to Inspect Car Brake Rotors

Your vehicle has many components that wear out with use and time. One of these components is the brake rotors. It's important to inspect them regularly (about every 6 months) to keep them working properly and avoid brake problems.

Difficulty: Moderately Easy

Instructions

1. Unbolt your vehicle's tire and take it off.

2. Be aware that there are two styles of rotors. The first consists of one solid cast iron piece. The second style consists of two pieces: a cast iron part and a stainless steel top hat. These two parts come welded together inside.

3. Look for excessive corrosion on your rotor. Excessive corrosion will throw your tire out of balance when you bolt it back on. Having a high-speed vibration is another sign that there's excessive corrosion on the rotor.

4. Inspect the surface for any kind of grooves or cracks. If the rotor appears to be warped or you find grooves or cracks, machining it will take care of the problem. It will flatten it and allow it to work properly.

5. Notice that the rotor is between two discs. The fins between the discs allow the flow of air to keep the brake rotor cool. It works much like a fan when the wheel spins. Rotate the wheel and check for any cracked fins.

6. Chip off any surface rust you find to keep it from interfering when you install new brake pads.

7. Spin the rotor around and continue checking for cracks on the fins. Rub your fingers on the inboard surface and feel for grooves. If everything looks and feels good, install your new brake pads and don't worry about doing anything to the rotor.