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:

Lane Departure Warning (LDW)
If equipped, LDW is intended to help avoid unintentional lane departures at speeds of 56 km/h (35 mph) or greater. LDW uses a camera sensor to detect the lane markings. The LDW indicator, , appears green if a lane marking is detected. If the vehicle departs the lane, the indicator will chang ...

DIC Operation and Displays
The DIC has different displays which can be accessed by using the DIC buttons on the turn signal lever on the left side of the steering wheel. The DIC displays trip, fuel, and warning messages if a system problem is detected. See Trip Computer and Vehicle Messages. DIC Buttons 1. SET/C ...

Instrument Panel Center Upper Molding Replacement
Instrument Panel Center Upper Molding Replacement Callout Component Name Preliminary Procedure Remove the instrument panel center molding. Refer to Instrument Panel Center Molding Replacement. 1 ...

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