The overheating may have caused the brake fluid to vaporize, resulting in
the same problems as having massive air in the line.
Gary
Rod Randle wrote:
> Yesterday I was having a nice drive on the freeway when I tried to slow
> down only to find the brake went solidly to the floor. The fifth time I
> pumped the peddle I finally got about an inch of peddle, the next time I
> hit the peddle it was fine. This made for a kind of shaky situation due
> to the brake lights in front of me. For the rest of my trip it took 4
> or 5 pumps to get the peddle off the floor. When I arrived at my
> destination I had one wheel that was excessively hot. Later in the
> evening when I made my return trip home the peddle had returned to
> normal. For most of the return trip the brakes seemed ok but maybe
> dragging a little from the one wheel that had gotten hot. When I was
> almost home I felt the dragging go away! Today the brakes seem fine and
> the drag I felt earlier has completely gone away.
>
> What are the odds that overheating the caliper broke free any buildup
> and now that it is cool it is operating normally? I am going to change
> out the brake fluid in case I may have moisture or air in it which may
> have caused my failure yesterday. The important thing is no brakes in
> traffic and not getting in an accident.
>
> One more item, my '78 has very poor brakes normally. Could this be due
> to the quality of disk pads?
>
> --
> Rod Randle
>
> '77 XJ-S
> '78 Spitfire
> '93 Saturn
> '72 GMC P/U
> '73 Chev P/U
> '74 Lincoln Mk IV
>
> .
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