Checking the condition of the front brake discs (Chevrolet Aveo T200)

1. Check the thickness of the brake disc. Uneven thickness can be checked by measuring the thickness of the brake disc at four or more points around the perimeter of the brake disc. All these measurements should be taken at the same distance from the edge of the brake disc.

A brake disc whose thickness varies by more than 0.10 mm may cause brake pedal pulsation and/or front axle vibration during braking. A brake disc that does not meet the specified values must be modified or replaced.

Minor grooves on the brake disc surface, no more than 0.40 mm in depth, which may be the result of normal operation, do not have a negative effect on the braking process.

2. Check the lateral runout of the brake disc. The maximum permissible lateral runout should be a maximum of 0.10 mm. If the lateral runout exceeds this specified value, make sure that there is no dirt between the brake disc and the hub, that the contact surfaces are smooth and free of burrs.

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1. Place the gear shift in neutral position.

2. Remove the brake disc.

3. Using two wheel screws, install the brake disc onto the hub.

4. Install the digital indicator on the brake caliper.

5. Position the indicator tip approximately 0.10 mm from the outer edge of the brake disc, perpendicular to the disc surface, applying slight pressure to the disc.

6. Remove the digital indicator and the wheel bolts securing it to the hub.

7. Install the brake disc.