Chevrolet Sonic Repair Manual: Brake System External Leak Inspection
Warning:
Refer to Brake Fluid Irritant Warning.
Caution:
Refer to Brake Fluid Effects on Paint and Electrical Components
Caution.
- In order to inspect for external brake fluid leaks, first inspect the fluid
level in the master cylinder.
While a slight brake fluid level drop can be considered a normal condition
due to brake lining wear, a very low level may indicate a brake fluid leak in
the hydraulic system.
- If the fluid level is abnormally low, adjust the brake fluid level. Refer
to Master Cylinder Reservoir Filling.
- Start the engine and allow it to idle.
- Apply constant, moderate foot pressure to the brake pedal.
If the brake pedal gradually falls away while under foot pressure, there
may be a brake fluid leak.
- Turn the ignition OFF.
- Visually inspect the following brake system components for brake fluid leaks,
excessive corrosion, and damage. Give particular attention to all brake pipe
and flexible hose connections to ensure that there are not any slight brake
fluid leaks – even though the brake pedal may feel firm and hold steady:
- Master cylinder brake pipe fittings
- All brake pipe connections
- Brake pipes
- Brake hoses and connections
- Brake calipers and/or wheel cylinders
While slight dampness around the master cylinder reservoir can be considered
acceptable, brake fluid leaking from any of the brake system components requires
immediate attention. If any of these components exhibit signs of brake fluid leakage,
repair or replace those components. After the repair or replacement, reinspect the
hydraulic brake system to assure proper function.
Removal Procedure
Warning: Refer to Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical
Components Caution.
Caution: Always ...
The vehicle brake system consists of two hydraulic circuits. If one circuit is
not working, the remaining circuit can still work to stop the vehicle. For normal
braking performance, both circuits ...
Other materials:
How to Identify Plastic Parts
saepvcsae
Plastic parts can be identified by the SAE code, which is usually found on the
rear of the part, and/or by the characteristics of the plastic. Knowing the type
of plastic aids in selecting the proper repair materials and in selecting the proper
repair procedure.
Look for the SAE ...
Replacing Airbag System Parts after a Crash
Warning: A crash can damage the airbag systems in the vehicle. A damaged
airbag system may not work properly and may not protect you and your passenger(s)
in a crash, resulting in serious injury or even death. To help make sure the
airbag systems are working properly after a crash, have ...
Air Cleaner Assembly Replacement
Air Cleaner Assembly Replacement
Callout
Component Name
1
Air Cleaner Outlet Duct Clamp.
Procedure
Loosen clamp and remove air cleaner outlet duct from air cleaner assembly.
2
Mass ...
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