G8 V6-3.6L (2008)
Brake Rotor/Disc: Testing and Inspection
Brake Rotor Assembled Lateral Runout Correction - Indexing
Brake Rotor Assembled Lateral Runout Correction - Indexing
Important: Brake disc thickness variation MUST be inspected BEFORE inspecting 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) .
Important: Brake disc and hub indexing is required so the minimum installed brake disc runout is achieved. Brake disc and hub indexing
involves aligning the point of maximum runout on the hub with the point of least runout on the brake disc.
Important: The procedure is to be used when installing NEW brake discs or brake discs that have been removed for any reason and where the
brake disc to hub matching is not evident.
The procedure consists of three parts:
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Clean Mating Surfaces.
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Indexing Brake Disc to Hub. If these measurements are not within specification, go to Hub Runout Inspection.
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Hub Runout Inspection.
Clean Mating Surfaces
Caution: Refer to Safety Glasses Caution (See: Service Precautions/Technician Safety Information/Safety Glasses Warning) .
Caution: Refer to Vehicle Lifting Caution (See: Maintenance/Vehicle Lifting/Service Precautions) .
Caution: Refer to Brake Dust Caution (See: Service Precautions/Technician Safety Information/Brake Dust Caution) .
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair) .
2. Remove wheels. Refer to Tire and Wheel Removal and Installation (See: Maintenance/Wheels and Tires/Service and Repair) .
3. Remove the brake caliper. Refer to Front Brake Rotor Replacement (See: Service and Repair/Removal and Replacement/Front Brake Rotor
Replacement) or Rear Brake Rotor Replacement (See: Service and Repair/Removal and Replacement/Rear Brake Rotor Replacement) .
4. Make sure that brake disc and hub mating surfaces are free from dirt, corrosion, etc. If required, use fine emery paper to clean surfaces.
Indexing Brake Disc to Hub - Front
Caution: Refer to Safety Glasses Caution (See: Service Precautions/Technician Safety Information/Safety Glasses Warning) .
Caution: Refer to Vehicle Lifting Caution (See: Maintenance/Vehicle Lifting/Service Precautions) .
Caution: Refer to Brake Dust Caution (See: Service Precautions/Technician Safety Information/Brake Dust Caution) .
