worn pads on a thin rotor result in the backing plate on the pad
jamming on the anit-rattle spring, which does not compress. This
cocks the pistons, causing them to lock in place instead of
retracting (and they DO retract on the square seal), causing dragging
brakes and eventually no rear brakes at all and damaged calipers.
Replace them if in doubt -- last time I bought some they were all of
$27 each.
Peter
On Nov 1, 2011, at 6:09 PM, Allan Streib wrote:
You can run on thin rotors as long as there is plenty of meat on the
pads. worn pads and worn rotors can lead to a very low pedal. In a
vehicle I am used to, I can tell when the pads are low by when the
pedal is low.
This doesn't make sense to me as on disc brakes the pads always
ride on
the surface of the rotor, they don't retract. A thin rotor + low pads
would cause a lower fluid level, but I don't see this causing a low
pedal.
Allan
--
1983 300D
1979 300SD
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