G6 L4-2.4L (2007)
Brake Rotor/Disc: Testing and Inspection
Brake Rotor Assembled Lateral Runout Correction - Correction Plates
Brake Rotor Assembled Lateral Runout Correction - Correction Plates
Tools Required
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J 39544-KIT Complete Torque Socket Set-10 Pieces, or equivalent
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J 45101-100 Conical Brake Rotor Washers
Caution: Refer to Brake Dust Caution .
Important:
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Brake rotor thickness variation MUST be checked BEFORE checking for assembled lateral runout (LRO). Thickness variation
exceeding the maximum acceptable level can cause brake pulsation. Refer to Brake Rotor Thickness Variation Measurement . See:
Brake Rotor Thickness Variation Measurement
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Brake rotor assembled LRO exceeding the maximum allowable specification can cause thickness variation to develop in the brake
rotor over time, usually between 4 800-11 300 km (3,000-7,000 mi). Refer to Brake Rotor Assembled Lateral Runout Measurement . See:
Brake Rotor Assembled Lateral Runout Measurement
1. Rotate the brake rotor to position the high spot, identified and marked during the brake rotor assembled LRO measurement procedure, to face
upward.
2. Remove the J 45101-100 and the lug nuts that were installed during the assembled LRO measurement procedure and/or the indexing correction
procedure. See: Brake Rotor Assembled Lateral Runout Correction - Indexing
3. Inspect the mounting surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining.
4. Select the correction plate, following the manufacturer's instructions, which has a specification closest to the assembled LRO measurement.
For example: If the assembled LRO measurement was 0.076 mm (0.003 in), the 0.076 mm (0.003 in) correction plate would be used. If the
measurement was 0.127 mm (0.005 in), the 0.152 mm (0.006 in) correction plate would be used.
