Chevrolet Sonic Repair Manual: Hydraulic Brake Component Operation Visual Inspection
- Disc Brake
-
- 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
-
- 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:
Pairing without Touchscreen
A Bluetooth-enabled cell phone must be paired to the Bluetooth system and then
connected to the vehicle before it can be used. See your cell phone manufacturer's
user guide for Bluetooth functions before pairing the cell phone. If a Bluetooth
phone is not connected, calls will be made usin ...
Indicator/Warning Message Description and Operation
Indicator LIGHT ON
Refer to the owner's manual for the descriptions and explanations of all
indicator lights.
For diagnosis and repair information related to an indicator light, refer
to the System Diagnosis and the Description of Operation that the message relates
to.
...
Drive Belt Tensioner Replacement
Special Tools
EN-955 Locking Pin
EN-48488 Holding Wrench
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Remove the right front wheelhouse liner extension. Refer to Front Wheelhouse
Liner Inner Front Extension Replacement
Install the engine su ...
0.0067