Chevrolet Sonic Repair Manual: Brake Drum Diameter Measurement
- Remove brake drum. Refer to Brake Drum Replacement
- Clean the brake shoe lining contact surface of the brake drum (2) with denatured alcohol or an equivalent approved brake cleaner.
- Using a brake drum micrometer (1) calibrated in thousandths-of-an-inch,
measure and record the largest diameter of the brake drum at four or more points,
equally spaced around the drum.
Ensure the measurements are only taken within the brake shoe lining contact area. The micrometer must be positioned the same distance from the outside edge of the drum for each measurement.
- Compare the largest diameter measurement recorded to the brake drum component specifications. Refer to Drum Brake Component Specifications.
- If the largest diameter measurement of the brake drum is less than the maximum allowable inside diameter after refinishing specification; the drum may be refinished, depending upon surface and wear conditions.
- If the largest diameter measurement of the brake drum is equal to or greater than the maximum allowable diameter after refinishing specification; the drum may not be refinished.
- If the largest diameter measurement of the brake drum is equal to or greater than the discard diameter specification; the drum requires replacement.
- Install brake drum. Refer to Brake Drum Replacement.
Warning:
Refer to Brake Dust Warning.
Drum Brakes
...
Brake Drum 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.
T ...
Other materials:
Headlining Trim Panel Replacement (Sedan with Sunroof)
Headlining Trim Panel Replacement
Callout
Component Name
Warning: Do not attempt to repair or alter the head impact
energy-absorbing material glued to the headliner or to the garnish trims.
If the material is damaged ...
Steering Linkage Outer Tie Rod Replacement
Steering Linkage Outer Tie Rod Replacement
Callout
Component Name
Preliminary Procedures
Raise and support the vehicle. Refer to Lifting and Jacking the
Vehicle.
Remove the front tire and wheel assembly. Refer to Tire and ...
Battery Disconnect Warning
Warning: Unless directed otherwise, the ignition and start switch
must be in the OFF or LOCK position, and all electrical loads must be OFF before
servicing any electrical component. Disconnect the negative battery cable to
prevent an electrical spark should a tool or equipment come in c ...
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