Chevrolet Sonic Repair Manual: Brake Rotor Surface and Wear Inspection

Chevrolet Sonic Repair Manual / Chassis / Brakes / Disc Brakes / Brake Rotors / Brake Rotor Surface and Wear Inspection

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 Brake Pads Replacement.
Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
Inspect the friction surfaces of the brake rotor for the following braking surface conditions:

Heavy rust and/or pitting
Light surface rust can be removed with an abrasive disc. Heavy surface rust and/or pitting must be removed by refinishing the brake rotor.
Cracks and/or heat spots
Too much blueing discoloration

If the friction surfaces of the brake rotor exhibit one or more of the braking surface conditions, the brake rotor requires refinishing or replacement.

Using a micrometer (1) calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch, measure and record the scoring depth of any grooves present on the brake rotor friction surfaces.

Compare the groove scoring depth recorded to the following specification: Specification

Brake rotor maximum allowable scoring: 1.50 mm (0.059 in) .

If the brake disc rotor scoring depth exceeds the specification, or if an excessive amount of scoring is present, the brake rotor requires refinishing or replacement.

Brake Rotor Refinishing

Special Tools CH-41013 Rotor Resurfacing Kit CH-42450-A Wheel Hub Resurfacing Kit For equivalent regional tools, refer to Special Tools. Warning: Refer to Brake Dust Warning. Note ...

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 ...

Other materials:

Remote Keyless Entry (RKE) System Operation
The RKE transmitter may work up to 60m (195 ft) away from the vehicle. Other conditions can affect the performance of the transmitter. See Remote Keyless Entry (RKE) System. The RKE transmitter can have one of the two symbols for the remote trunk release. With Remote Start Shown The follow ...

Rear Seat Latch Replacement
Rear Seat Latch Replacement Callout Component Name Preliminary Procedures Remove the rear seat back cushion. Refer to Rear Seat Back Cushion Removal and Installation. Remove the rear seat back cushion cover and pad. Refer ...

Steering Gear Replacement
Steering Gear Replacement Callout Component Name Caution: With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to p ...

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