Chevrolet Sonic Repair Manual: Hydraulic Brake Component Operation Visual Inspection
- Disc Brake
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- With the tire and wheel assemblies removed and the brake rotors retained by wheel lug nuts, visually inspect the brake caliper piston dust boot (2) sealing area to ensure that there are no brake fluid leaks.
- If any evidence of a brake fluid leak is present, the brake caliper requires overhaul or replacement.
- While the brake system is at rest (4), observe the position of the brake caliper piston (1) in relation to the brake caliper housing.
- Have an assistant apply and release the brake pedal several times while you observe the operation of the hydraulic brake caliper.
- Observe the brake caliper piston (1) for unrestricted and even movement during each apply of the brake system (5).
- Observe the brake caliper piston (1) for an unrestricted and even return motion during each release of the brake system (6).
- If the brake caliper piston (1) did not exhibit unrestricted and even movement during brake system apply and/or release, the piston square seal (3) may be worn or damaged and the brake caliper may require overhaul or replacement.
- Drum Brakes
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- With the rear tire and wheel assemblies and the brake drums removed, visually inspect the wheel cylinder pistons boot sealing areas to ensure that there are no brake fluid leaks.
- If any evidence of a brake fluid leak is present, the brake wheel cylinder requires replacement.
- Using firm hand pressure, simultaneously and evenly apply force on both brake shoes in order to compress the wheel cylinder pistons into their bore.
- Evenly release the force from both brake shoes to allow the wheel cylinder pistons to return.
- If one or both of the wheel cylinder pistons did not exhibit unrestricted and even movement during apply and/or release of force, the wheel cylinder may require replacement.
Hydraulic Brakes
...
Hydraulic Brake System Bleeding (Manual)
Warning: Refer to Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components
Caution.
Caution: Only use products that comply with GM spe ...
Other materials:
Steel Wheel Repair Description
Caution: Do not heat wheels in an attempt to soften them for straightening
or repair damage from striking curbs, etc. Do not weld wheels. The alloy used
in these wheels is heat-treated and uncontrolled heating from welding affects
the properties of the material.
Caution: The use o ...
Special Tools
Illustration
Tool Number/Description
EL 38758
EL 50074
J 38758
Parasitic Draw Test Switch
EL 50313
EL 42000
EL 50076
J 42000
...
Torque Converter Housing with Fluid Pump Assembly Removal (Non Hybrid)
Torque Converter Housing with Fluid Pump Assembly Removal
Callout
Component Name
1
Torque Converter and Differential Housing Bolts M8 x 30 (Qty: 15)
2
Torque Conv ...
0.0068