Chevrolet Sonic Repair Manual: 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 Brake Pads Replacement.
- Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
- 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 four 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.
- Compare the lowest thickness measurement recorded to the specifications. Refer to Disc Brake Component Specifications.
- If the lowest thickness measurement of the brake rotor is above the minimum allowable thickness after refinishing specification, the brake rotor may be able to be refinished, depending upon surface and wear conditions which may be present.
- If the lowest thickness measurement of the brake rotor is at or below the discard thickness specification, the brake rotor requires replacement.
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 Bra ...
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 variati ...
Other materials:
Anti-Corrosion Treatment and Repair (Base)
Warning: When applying sound deadeners, or anti-corrosion materials
due care and preventative measures must be exercised to prevent any material
from being sprayed into door and quarter panel mechanisms such as door locks,
window run channels, window regulators and seat belt retractors, ...
Engine Coolant Thermostat Housing Replacement (LUW)
Removal Procedure
Remove the battery tray. Refer to Battery Tray Replacement.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Drain the cooling system. Refer to Cooling System Draining and Filling.
Disconnect the engine harness conn ...
Shift Fork Cleaning and Inspection (Gen 1)
Warning: Wear safety glasses to avoid injury when using compressed
air or any cleaning solvent. Bodily injury may occur if fumes are inhaled
or if skin is exposed to chemicals.
Clean the following components with a suitable solvent.
Air dry all the parts.
3rd and ...
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