olfarmer wrote:
Thanks for the replies. Those are the only reasons that I could think of too. The fluid has never been flushed to my knowledge. Wouldn't a failing master cylinder have leakage and fluid loss? Or, could the fluid pass by the piston and not leak out?
Ed
Brake fluid should be changed every 2 - 3 years, with at least DOT 4 and 5.1 would be even better, but may be hard to find.
Boiling point for new fluid is over 400F and with you obviously boiling yours, it was probably lucky to have been 212F.
Also reeducate yourself on mountain descents and if you're using the brakes much at all, going down, you need to be in low gear.