Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Brake Rotor/Drum Balance Inspection

Chevrolet Sonic Repair Manual / Chassis / Brakes / Disc Brakes / Brake Rotors / Brake Rotor/Drum Balance Inspection

  1. Support the vehicle drive axle on a suitable hoist. Refer to Lifting and Jacking the Vehicle.
  2. Remove the tire and wheel assemblies from the drive axle. Refer to Tire and Wheel Removal and Installation.
  3. Warning:

    Refer to Work Stall Test Warning.

  4. Reinstall the wheel nuts in order to retain the brake rotors.
  5. Run the vehicle at the concern speed while inspecting for the presence of the vibration.
  6. 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.

  7. If the vibration is still present, remove the rotors from the drive axle, then run the vehicle back to the concern speed.
  8. 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.

  9. 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:
    1. Mount the brake rotor/drum on a balancer in the same manner as a tire and wheel assembly.
    2. Note:

      Check brake rotors/drums for static imbalance only; ignore the dynamic imbalance readings.

    3. Inspect the rotor/drum for static imbalance.

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
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Other materials:

Seat Belt Service Precautions
Note: If the vehicle has been in a collision, refer to Repairs and Inspections Required After a Collision for additional information. Do not bleach or dye the seat belt webbing. Use only the following items in order to clean the seat belt webbing: A mild soap and water ...

Vehicle Yaw Sensor Learn
The yaw sensor does not require calibration often. Calibration of the yaw rate sensor might be required after certain service procedures are performed. Some of these procedures are as follows: Electronic brake control module (EBCM) replacement Multi-axis acceleration sensor replacement ...

Engine Oil Cooler Disassemble
Remove the oil cooler coolant inlet hose clamp (2). Remove the oil cooler coolant inlet hose (1). Remove the oil cooler coolant inlet pipe bolt (7) Remove the oil cooler coolant inlet pipe (3) and the seal ring (6). Remove the oil cooler coolant out ...

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