Savana 1500 RWD V6-4.3L (2007)
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. Compare the lowest thickness measurement recorded to the following specifications:
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Brake rotor minimum allowable thickness after refinishing 28.0 mm (1.102 in)
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Brake rotor discard thickness 27.50 mm (1.083 in)
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Brake rotor minimum allowable thickness after refinishing 37.0 mm (1.457 in)
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Brake rotor discard thickness 36.50 mm (1.437 in)
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Brake rotor minimum allowable thickness after refinishing 29.0 mm (1.142 in)
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Brake rotor discard thickness 28.50 mm (1.122 in)
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Brake rotor minimum allowable thickness after refinishing 28.0 mm (1.102 in)
-
Brake rotor discard thickness 27.50 mm (1.083 in)
4. If the lowest thickness measurement of the brake rotor is above the minimum allowable thickness after refinishing specification then the rotor may
be refinished, depending upon surface and wear conditions which may be present.
5. If the lowest thickness measurement of the brake rotor is at or below the minimum allowable thickness after refinishing specification then the rotor
may not be refinished.
6. If the lowest thickness measurement of the brake rotor is at or below the discard thickness specification then 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
four 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
edge of the rotor, about 13 mm (1/2 in), for each measurement.
4. Calculate the difference between the highest and lowest thickness measurements recorded to obtain the amount of thickness variation.
5. Compare the thickness variation measurement to the following specification:
Brake rotor maximum allowable thickness variation: 0.025 mm (0.001 in)
