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Hi
Bill,
Not to worry, this is the classic pattern of
a worn out master cylinder, the little rubber sealing cups in the cylinder bore
are no longer sealing well. If there is little or no corrosion in the bore
just disassemble, clean, hone the cylinder and replace the cups. Worst
case, the acid that collects in the bottom of the cylinder etches it beyond what
a hone can clean up and you will have to replace it.
Regards,
John / 82 Imp
List,
A problem surfaced today on my 1968 Crown Coupe, as you might
guess, it concerns the brakes. This car has always had excellent
brakes, which never caused a problem, until today. Here is what happened
today, the car had good brakes at the start of the drive, but when I
stopped for any reason, stop light, etc, noticed that the brake pedal would
slowly sink toward the floor from the pressure of my foot. At first, a
couple of rapid pumps gave a hard pedal, but then the pressure of my foot
again caused the pedal to go lower, which allowed the car to creep
forward. Just as I arrived home, had hardly any brakes left at all, more
pumping of the brake pedal had no effect. Of course, I checked the
master cylinder for fluid level, and found both compartments full to the brim,
The engine runs smooth, which makes me doubt if there is a vacuum
leak. I need your suggestions as to what caused this problem and
the fix you might recommend. I have owned this car for fourteen years
and the calipers had been converted to stainless steel sleeves prior to
that.
Thank you,
Bill/Imp, 68's
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