Chevrolet Sonic Repair Manual: Brake Drum Surface and Wear Inspection
Special Tools
CH-8001 Dial Indicator Set
For equivalent regional tools, refer to Special Tools.
Warning:
Refer to Brake Dust Warning.
- With the brake drum removed, clean the brake shoe lining contact surface
of the brake drum with denatured alcohol or an equivalent approved brake cleaner.
- Inspect the braking surface of the brake drum for the following braking
surface conditions:
If the braking surface of the brake drum exhibits one or more of the braking
surface conditions listed, the drum requires refinishing or replacement.
Using a brake drum micrometer calibrated in thousandths-of-an-inch, measure
and record any grooves present on the drum braking surface.
Ensure that the measurements are only taken within the brake shoe lining contact
area.
Compare the groove, or scoring depth recorded to the following specification:
Specification
Brake drum maximum allowable scoring: 0.50 mm (0.020 in)
If the brake drum scoring depth exceeds the specification, or if an excessive
amount of scoring is present, the drum requires refinishing or replacement.
Mount the brake drum on a brake lathe.
Mount a dial indicator, CH-8001 indicator (1), or equivalent, and position
the indicator button so it contacts the braking surface of the brake drum (2) at
a 90 degree angle, approximately 19 mm (0.75 in) from the outer edge of the drum.
Measure and record the radial runout of the brake drum.
- Rotate the drum until the lowest reading is displayed on the indicator dial,
then zero the dial.
- Rotate the drum until the highest reading is displayed on the dial.
Compare the radial runout of the brake drum to the following specification:
Specification
Brake drum maximum allowable radial runout: 0.03 mm (0.001 in)
If the brake drum radial runout exceeds the specification, the drum requires
refinishing or replacement.
Special Tools
CH-41013 Rotor Resurfacing Kit
CH-42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Warning: Refer t ...
Warning: Refer to Brake Dust Warning.
Visually inspect the adjuster actuator spring (1) for the following conditions:
Excessive stretching
Excessive bending
Exces ...
Other materials:
Instrument Panel Upper Trim Panel Replacement - Left Side
Instrument Panel Upper Trim Panel Replacement - Left Side
Callout
Component Name
Preliminary Procedure
Remove the instrument cluster assembly. Refer to Instrument Cluster
Replacement.
Remove the instrument panel center mo ...
Engine Component Description
Cylinder Block
The cylinder hollow frame structured in–line 4 cylinder. The block has 5 crankshaft
bearings with the thrust bearing located on the third bearing from the front
of the engine.
Crankshaft
The crankshaft is a steel crankshaft. It is supported ...
Transmission Case Disassemble (Gen 2)
Special Tools
3-9506289 Universal Adapter
J-810700 Mainshaft Bearing Remover
J-810704 Center Bar Puller
M-680770 Universal Sliding Mallet
R-0007758 Holding Fixture
R-0007770 Holding Fixture Adapter Plates
T-0307000 Extractor and Driver Fixture
T-9807671 Slide Hammer
For eq ...
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