TL V6-3.5L (2007)
Brake Rotor/Disc: Testing and Inspection
Front
Front Brake Disc Inspection
Runout
1. Raise the front of the vehicle, and support it with safety stands in the proper locations.
2. Remove the front wheels. Take care not to scratch the calipers (Type S model).
3. Remove the brake pads.
4. Inspect the brake disc surface for damage and cracks. Clean the brake disc thoroughly, and remove all rust.
5. Install suitable flat washers (A) and wheel nuts (B), and tighten the wheel nuts to the specified torque to hold the brake disc securely against the
hub.
6. Set up the dial gauge (C) against the brake disc as shown, and measure the runout at 10 mm (3/8 in.) from the outer edge of the brake disc.
Brake disc runout:
Service limit 0.10 mm (0.004 in.)
7. If the brake disc is beyond the service limit, refinish the brake disc with an on-car brake lathe. The Kwik-Lathe produced by Kwik-way
Manufacturing Co. and the "Front Brake Disc Lathe" offered by Snap-on Tools Co. are approved for this operation.
Max refinishing limit:
Except Type S model:
26.0 mm (1.02 in.)
Type S model (4-piston caliper type):
23.0 mm (0.91 in.)
NOTE:
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If the brake disc is beyond the service limit for refinishing, replace it.
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A new brake disc should be refinished if its runout is greater than 10 mm (0.004 in.).
Thickness and Parallelism
1. Raise the front of the vehicle, and support it with safety stands in the proper locations.
2. Remove the front wheels. Take care not to scratch the calipers (Type S model).
3. Remove the brake pads.
4. Using a micrometer, measure brake disc thickness at eight points, approximately 45° apart and 10 mm (3/8 in.) in from the outer edge of the brake
disc. Replace the brake disc if the smallest measurement is less than the max. refinishing limit.
Brake disc thickness:
Except Type S model:
Standard: 27.9-28.1 mm (1.10-1.11 in.)
Max. refinishing limit: 26.0 mm (1.02 in.)
Type S model (4-piston caliper type):
Standard: 24.9-25.1 mm (0.98-0.99 in.)
Max. refinishing limit: 23.0 mm (0.91 in.)
Brake disc parallelism 0.015 mm (0.0006 in.) max.
NOTE: Parallelism is the maximum allowable difference between the thickness measurements.
