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
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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:
Dome Lamp Bulb Replacement
Dome Lamp Bulb Replacement
Callout
Component Name
Preliminary Procedure
Remove the windshield header courtesy lamp. Refer to Windshield Header
Courtesy Lamp Replacement
1
Dome Lamp Bulb
...
Rear Side Door Window Regulator Replacement (Hatchback)
Rear Side Door Window Regulator Replacement
Callout
Component Name
Warning: Refer to Glass and Sheet Metal Handling Warning.
Preliminary Procedure
Remove the front side door window from the guide. Do not remove ...
Tire Inspection
We recommend that the tires, including the spare tire, if the vehicle has
one, be inspected for signs of wear or damage at least once a month.
Replace the tire if:
The indicators at three or more places around the tire can be seen.
There is cord or fabric showing through the tire's ...
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