I have a Malibu 2001 with 73k on clock. The front brakes and rotors were
replaced at 50k approx. I have now noticed that only the outboard pad on
the passenger side has wore away considerably to the point that grooves have
appeared on the rotor? What gives? Any suggestions for the uneven wear?
That car doesn't pull to any side when braking.
I spent a small fortune on Bendix parts because I had read that using the
cheaper parts ain't worth the hassle. 25k miles down the road I am needing
to fork out another small fortune.
Any thoughts appreciated.
Sounds to me as though you are getting above average
wear on your brakes. Forget about the grooves, how
thick is the pad? And make sure you check the inner
pad, because it usually wears out about twice as fast
as the outer pad on these vehicles.
I don't really know why these brakes wear out that way. But
every last one that comes in the shop is worn out this way so
we assume that it's a quirk of the design. These front calipers
don't have many problems with the slider mechanisms, I'd be
more likely to suspect a problem with the piston.
We often get vehicles that have been inspected by chain shops
and they tell the customer to bring it in to the dealership for
warranty because there is something wrong with the calipers.
We have to set them straight. I can only imagine how many
front calipers are being sold to the consumer out in "aftermarker"
land. It would be an easy sell, show the customer the two pads,
and bingo...they would think there is a problem with the caliper.
Perhaps the slides are sticking and you've got an outboard pad
sticking on. Check that your caliper slides freely & that your
piston moves back into the caliper as it should upon release of
hydraulic pressure. It is very rare that friction materials will
brake down prematurely resulting in the wear that you're describing.
But it is possible.
PS the piston return in the caliper is provided by the piston seal
deformation returning to static position. (Fractions of an inch)
I agree. That is an unusual wear pattern and the hardware could be the
cause. For some reason I end up replacing those slider pins after
about two years, even before the pads are worn out. They cost $8+ each
last time. There is so little movement there that they have plenty of
time to get dirty/rusty. When that section of the slider is needed
after some wear, the caliper gets stuck on the crud.
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