Master Cylinder: Inspection
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
No abrasives can be used in master cylinder bore.
Clean the interior and exterior of the master cylinder, the secondary piston, and the return spring in denatured alcohol, or equivalent. Inspect master cylinder bore for scoring and/or corrosion. If scoring or corrosion are noted, replace master cylinder. Inspect reservoir if it is cracked or deformed.