G6 V6-3.9L VIN 1 (2006)
Brake Rotor/Disc: Testing and Inspection
Brake Rotor Assembled Lateral Runout Correction - Indexing
Brake Rotor Assembled Lateral Runout (LRO) Correction - Indexing
Tools Required
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J39544-KIT Torque-Limiting Socket Set, or equivalent
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J45101-100 Conical Brake Rotor Washers
Caution: Refer to Brake Dust Caution in Service Precautions.
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.
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Brake rotor assembled lateral runout (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 miles).
1. Remove the J45101-100 and the lug nuts that were installed during the assembled LRO measurement procedure.
2. Inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining.
3. Index the brake rotor in a different orientation to the hub/axle flange.
4. Hold the rotor firmly in place against the hub/axle flange and install one of the J45101-100 (1) and one lug nut (2) onto the upper-most wheel stud.
5. Continue to hold the rotor secure and tighten the lug nut firmly by hand.
6. Install the remaining J45101-100 and lug nuts onto the wheel studs and tighten the nuts firmly by hand in a star-pattern.
7. Using the J39544-KIT, or equivalent, tighten the lug nuts in a star-pattern to specification, in order to properly secure the rotor.
8. Measure the assembled LRO of the brake rotor.
9. Compare the amount of change between this measurement and the original measurement.
10. If this measurement is within specifications, proceed to step 14.
