1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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17,323 Posts
Air in the lines will usually give a 'low and spongy' pedal.
As long as there are no external brake fluid leaks (reservior stays full), then the the master cylinder may have an internal leak (fluid is leaking past the rubber plunger cup when applying the pedal). This can be from worn cups or contaminated fluid (sediment allowing internal leakage past the cup).
As long as there are no external brake fluid leaks (reservior stays full), then the the master cylinder may have an internal leak (fluid is leaking past the rubber plunger cup when applying the pedal). This can be from worn cups or contaminated fluid (sediment allowing internal leakage past the cup).