Astro Van 2WD V6-4.3L VIN W (2001)
6. Remove the piston seal from the caliper bore. Do not use a metal tool.
7. Remove the bleeder valve from the caliper body.
8. Clean the bleeder valve, the caliper bore, the caliper passages and the piston with denatured alcohol. Dry the parts and blow out the brake fluid
passages. Use dry and filtered compressed air.
9. Inspect the piston and the caliper for the following conditions:
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Scoring on the piston surface or in the caliper bore
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Corrosion on the piston
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Chrome plating damage on the piston
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Corrosion in the caliper bore
Use crocus cloth in order to polish light corrosion from the caliper bore. Replace the caliper if the corrosion cannot be removed.
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Pitting in the caliper bore
10. Replace the piston or the caliper if you found any of the above conditions.
Installation Procedure