Chevrolet Sonic Repair Manual: Brake Rotor/Drum Balance Inspection
- Support the vehicle drive axle on a suitable hoist. Refer to Lifting and Jacking the Vehicle.
- Remove the tire and wheel assemblies from the drive axle. Refer to Tire and Wheel Removal and Installation.
- Reinstall the wheel nuts in order to retain the brake rotors.
- Run the vehicle at the concern speed while inspecting for the presence of the vibration.
- If the vibration is still present, remove the rotors from the drive axle, then run the vehicle back to the concern speed.
- If the vibration is eliminated when the brake rotors are removed from the drive axle, repeat the test with one rotor installed at a time. Replace the rotor that is causing or contributing to the vibration concern.
- If a brake rotor was replaced as a result of following the previous steps, or if necessary to confirm the results obtained during the previous steps, and/or to check the non-drive axle components, perform the following:
- Mount the brake rotor/drum on a balancer in the same manner as a tire and wheel assembly.
- Inspect the rotor/drum for static imbalance.
Warning:
Refer to Work Stall Test Warning.
Caution:
Do not depress the brake pedal with the brake rotors and/or the brake drums removed, or with the brake calipers repositioned away from the brake rotors, or damage to the brake system may result.
Note:
Check brake rotors/drums for static imbalance only; ignore the dynamic imbalance readings.
There is not a set tolerance for brake rotor/drum static imbalance. However, any brake rotor/drum measured in this same manner which is over 21 g (¾ oz) may have the potential to cause or contribute to a vibration. Rotors/drums suspected of causing or contributing to a vibration should be replaced. Any rotor/drum that is replaced should be checked for imbalance in the same manner.
Brake Rotor Thickness Variation Measurement
Warning: Refer to Brake Dust Warning.
Note: Any disc brake rotor that exhibits thickness variation exceeding
the maximum acceptable level must be refinished or replaced. Thickness variati ...
Drum Brakes
...
Other materials:
Hood Replacement
Hood Replacement
Callout
Component Name
Preliminary Procedure
Disconnect the windshield washer nozzle hose.
1
Hood Hinge Nut (Qty:?€‰4)
Caution: Refer to Fastener Caution.
Procedu ...
Rear Window Defogger Description and Operation
Rear Window Defogger System Components
The rear window defogger system consist of the following components:
The HVAC control module
The body control module (BCM)
The rear defogger relay
The rear window grid
Driver outside rearview mirror
Passenger outside rearview mirro ...
Headlining Trim Panel Replacement (Sedan with Sunroof)
Headlining Trim Panel Replacement
Callout
Component Name
Warning: Do not attempt to repair or alter the head impact
energy-absorbing material glued to the headliner or to the garnish trims.
If the material is damaged ...
0.0054