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:
Leaving the Vehicle with the Engine Running (Automatic Transmission)
Warning
It can be dangerous to leave the vehicle with the engine running. It could
overheat and catch fire.
It is dangerous to get out of the vehicle if the shift lever is not fully
in P (Park) with the parking brake firmly set. The vehicle can roll.
Do not leave the vehicle when the engine i ...
Engine Compartment Fuse Block
LUV and LUW Engines
The engine compartment fuse block is on the driver side of the vehicle, near
the battery.
Caution
Spilling liquid on any electrical component on the vehicle may damage it.
Always keep the covers on any electrical component.
To access the fuses, press the clips together, ...
Rear Seat Head Restraint Replacement
Rear Seat Head Restraint Replacement
Callout
Component Name
1
Rear Seat Head Restraint
Preliminary Procedures
Depress the large button on the head restraint guide and raise the
head restraint to the full up p ...
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