H3 L5-3.7L (2007)
4. Measure and record the amount of LRO.
16. Compare the brake rotor assembled LRO to the following specification:
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Front brake rotor maximum allowable assembled lateral runout: 0.13 mm (0.005 in)
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Rear brake rotor maximum allowable assembled lateral runout: 0.13 mm (0.005 in)
17. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications.
18. If the brake rotor assembled LRO measurement is within specification, install the brake caliper and depress the brake pedal several times to secure
the rotor in place before removing the J 45101-100 and the lug nuts.
Brake Rotor Thickness Measurement
Brake Rotor Thickness Measurement
Caution: Refer to Brake Dust Caution.
1. Clean the brake pad lining contact surface of the brake rotor with denatured alcohol or an equivalent brake cleaner.
2. Using a calibrated micrometer measure and record the lowest thickness of the brake rotor at 4 or more points equally spaced around the rotor.
Ensure that the measurements are only taken within the brake pad lining contact area and that the micrometer is positioned the same distance from
the outside edge of the rotor for each measurement.
3. If the lowest thickness measurement of the brake rotor is above the minimum allowable thickness after refinishing specification, the rotor may be
able to be refinished, depending upon surface and wear conditions which may be present.
4. If the lowest thickness measurement of the brake rotor is at or below the minimum allowable thickness after refinishing specification, the rotor may
not be refinished.
5. If the lowest thickness measurement of the brake rotor is at or below the discard thickness specification, the rotor requires replacement.
Brake Rotor Thickness Variation Measurement
Brake Rotor Thickness Variation Measurement
Caution: Refer to Brake Dust Caution.
Important: Any disc brake rotor that exhibits thickness variation exceeding the maximum acceptable level must be refinished or replaced.
Thickness variation exceeding the maximum acceptable level can cause brake pulsation.
1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads.
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
3. Using a micrometer calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch, measure and record the thickness of the brake rotor at
4 or more points, evenly spaced around the rotor.
Ensure that the measurements are only taken within the friction surfaces and that the micrometer is positioned the same distance from the outer