Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Brake Rotor Thickness Variation Measurement

Chevrolet Sonic Repair Manual / Chassis / Brakes / Disc Brakes / Brake Rotors / Brake Rotor Thickness Variation Measurement

Warning:

Refer to Brake Dust Warning.

Note:

Any disc brake rotor that exhibits thickness variation exceeding the maximum acceptable level must be refinished or replaced. Thickness variation exceeding the maximum acceptable level can cause brake pulsation.

  1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. Refer to Front Disc Brake Pads Replacement.
  2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.

  3. Using a micrometer (1) calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch, measure and record the thickness of the brake rotor at 4 or more points, evenly spaced around the brake rotor.

    Make sure that the measurements are only taken within the friction surfaces and that the micrometer is positioned the same distance from the outer edge of the brake rotor, about 13 mm (1/2 in), for each measurement.

  4. Calculate the difference between the highest and lowest thickness measurements recorded to obtain the amount of thickness variation.
  5. Note:

    Whenever a brake rotor is refinished or replaced, the assembled lateral runout (LRO) of the brake rotor must be measured to make sure optimum performance of the disc brakes.

  6. Compare the thickness variation measurement to the following specification: Specification


    • J93, J94: 0.02 mm (0.0008 in)

    • JPW, J97: 0.02 mm (0.0008 in)

  7. If the brake rotor thickness variation measurement exceeds the specification, the brake rotor requires refinishing or replacement.
Brake Rotor Thickness Measurement
Warning: Refer to Brake Dust Warning. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. Refer to Front Disc Bra ...

Brake Rotor/Drum Balance Inspection
Support the vehicle drive axle on a suitable hoist. Refer to Lifting and Jacking the Vehicle. Remove the tire and wheel assemblies from the drive axle. Refer to Tire and Wheel Removal and ...

Other materials:

Compass
The vehicle may have a compass display in the Driver Information Center (DIC). The compass receives its heading and other information from the Global Positioning System (GPS) antenna, StabiliTrak, and vehicle speed information. Avoid covering the GPS antenna, located on the roof, for long perio ...

Forward Collision Alert (FCA) Warning Light
These lights are on the center of the instrument panel. The vehicle ahead light comes on when a vehicle is detected ahead and a possible collision can occur. The forward collision alert comes on when following a vehicle much too closely. The light flashes when a vehicle is being rapidly ap ...

Remote Keyless Entry (RKE) System Operation
The RKE transmitter may work up to 60?€‰m (195?€‰ft) away from the vehicle. Other conditions can affect the performance of the transmitter. See Remote Keyless Entry (RKE) System. RKE without Remote Start Shown The following buttons are on the transmitter: Q ...

© 2014-2022 Copyright www.csmans.com
 
0.0076