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:

Power Outlets
The accessory power outlets can be used to plug in electrical equipment, such as a cell phone or MP3 player. The vehicle has an accessory power outlet in front of the cupholders on the center floor console. Remove the cover to access and replace when not in use. Warning Power is always suppl ...

Keyless Entry System Description and Operation
The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the door locks to unlock the vehicle. Keyless entry will lock/unlock the vehicle doors or open the rear compartment lid when a corresponding button on the keyless entry transmitter is press ...

Fuel Tank Filler Pipe Replacement (Steel Tank)
Removal Procedure Remove the fuel filler door housing. Refer to Fuel Tank Filler Door Latch Housing Replacement. Remove the bracket fastener (1). Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle. Remove the fuel tank fille ...

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