Do warped rotors cause wheel shimmy?
Unlike other vehicle problems, warped rotors will only cause your vehicle to shake when you are braking. If you are experiencing shaking during acceleration, you likely have a different vehicle issue, such as an alignment or balancing concern (more on these below).
How do you visually tell if rotors are warped?
Hold the straight edge of your ruler lengthwise against the surface of the brake rotor. Look between the rotor and the ruler. If you see a gap between the two, it’s a good sign the rotor has been warped. A warped rotor must be replaced with a new one.
What causes brakes to shimmy right after rotor and pad?
The shimmy feeling that comes from brakes is usually due to uneven friction material build-up on the rotor. This transfer from pad to rotor is supposed to happen, indeed it makes the brakes work better, which is why brakes function better after break-in.
What to do if your brakes pulsate after rotor and pad?
Check all installs with a dial indicator for runout. Spin the rotor with indicator at 90 degrees on the rotor face near the outer edge. Runout should be zero, must be under .004″, the less the better. Clean pad back, piston, and caliper. Replace shims. Proper and complete lubrication of all metal-to-metal contact points.
What should eccentricity be on rotor and pad?
Thickness eccentricity should be zero, must be under .0015″. Check all installs with a dial indicator for runout. Spin the rotor with indicator at 90 degrees on the rotor face near the outer edge. Runout should be zero, must be under .004″, the less the better. Clean pad back, piston, and caliper. Replace shims.
What should the runout be on a rotor?
Check all installs with a dial indicator for runout. Spin the rotor with indicator at 90 degrees on the rotor face near the outer edge. Runout should be zero, must be under .004″, the less the better. Clean pad back, piston, and caliper.