subcamper wrote:
MEXICOWANDERER wrote:
Corrosion seizing a disc brake caliper is SERIOUS. Rubber boots over the caliper piston are supped to SEAL the piston and the bore from moisture that can cause corrosion and seizing.
In all of the stuck-caliper situations my vehicles had, the cause was not a stuck piston but corroded slide bolts. Moisture got past the seal boots and corroded the bolt (and in one case the bore in the caliper). These situations are more common than a stuck piston and are far less serious. Usually I fixed them with a little sandpaper or a new bolt and some grease.
Steve
Thanks for the head's up Steve. That's why I recommended sampling the brake fluid at all four corners and inspecting the master cylinder. I have seen far too many cases of moisture contamination to dismiss its probability. This checking for moisture may be one of the more overlooked inspection points in automobile ownership. A thorough flushing of the brake system every three years can extend hydraulic parts life tremendously.
