outside brake pad more worn?

On Thu, 31 Mar 2011 18:27:56 -0400, Nate Nagel wrote:

> On 03/31/2011 06:26 PM, George wrote:
>> ('04 Cavalier, but I think I've seen this in other Cavs over the years.)
>>
>> This car has single-piston disk brakes in the front. The piston pushes
>> on the inside pad. But, the outside pad had much more wear. For the
>> outside pad to operate, AIUI, the piston pushes the inside pad against
>> the rotor, and the reaction pushes the piston& caliper inward,
>> resulting in the outer pad pushing against the other side of the rotor.
>>
>> So, how can the outer pad wear, without corresponding wear on the inside
>> pad?
>
> sticky sliders, would be my first guess.
>
> nate


Mine, too!

On Mar 31, 8:37*pm, Tegger > wrote:

> The inner pad is his problem, not the caliper.
>
> --
> Tegger

LMAO That's funny. Are you a mechanic?!

On Thu, 31 Mar 2011 18:49:40 -0400, George wrote:

> On Thu, 31 Mar 2011 18:27:56 -0400, Nate Nagel >
> wrote:
>
>>On 03/31/2011 06:26 PM, George wrote:
>>> ('04 Cavalier, but I think I've seen this in other Cavs over the
>>> years.)
>>>
>>> This car has single-piston disk brakes in the front. The piston pushes
>>> on the inside pad. But, the outside pad had much more wear. For the
>>> outside pad to operate, AIUI, the piston pushes the inside pad against
>>> the rotor, and the reaction pushes the piston& caliper inward,
>>> resulting in the outer pad pushing against the other side of the rotor.
>>>
>>> So, how can the outer pad wear, without corresponding wear on the
>>> inside pad?
>>
>>sticky sliders, would be my first guess.
>
> ... So, the outside pad doesn't release after braking?


No, it's held in place by the fingers on the caliper. The caliper is
mounted on sliding pins. If the pins are stuck, when you hit the brakes,
the caliper squeezes. It uses the rotation of the disc to move it back
out, but if the pins are sutck, they won't.

Calipers CAN go bad, but I have some with over 200,000 miles on them
because they were maintained. You can remove them, wizz them out a little
with a Dremel and an abrasion 'drum', grease them and have them go for a
while longer.

On 03/31/2011 05:37 PM, Tegger wrote:
> > wrote in
> news >
>
>>
>> And then service the pads.
>>
>>
>>
>
>
> The inner pad is his problem, not the caliper.
>

no, if the inner was stuck, then the inner would be wearing, not causing
the outer to wear.

outers usually wear because of slider problems. and sliders are a
common issue if the slider boots were damaged on the last pad change -
as is frequently the case.

--
nomina rutrum rutrum

On Fri, 01 Apr 2011 00:36:31 +0000, Tegger wrote:

> =?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?= > wrote
> in news >
>> On Thu, 31 Mar 2011 18:27:56 -0400, Nate Nagel wrote:
>>
>>> On 03/31/2011 06:26 PM, George wrote:
>>>> ('04 Cavalier, but I think I've seen this in other Cavs over the
>>>> years.)
>>>>
>>>> This car has single-piston disk brakes in the front. The piston
>>>> pushes on the inside pad. But, the outside pad had much more wear.
>>>> For the outside pad to operate, AIUI, the piston pushes the inside pad
>>>> against the rotor, and the reaction pushes the piston& caliper
>>>> inward, resulting in the outer pad pushing against the other side of
>>>> the rotor.
>>>>
>>>> So, how can the outer pad wear, without corresponding wear on the
>>>> inside pad?
>>>
>>> sticky sliders, would be my first guess.
>>>
>>> nate
>>
>>
>> Mine, too!
>>
>>
>
> No.


It wouldn't be my first guess?

On Thu, 31 Mar 2011 19:11:32 -0500, AMuzi wrote:

> Hachiroku $B%O%A%m%/ wrote:
>> On Thu, 31 Mar 2011 18:49:40 -0400, George wrote:
>>
>>> On Thu, 31 Mar 2011 18:27:56 -0400, Nate Nagel >
>>> wrote:
>>>
>>>> On 03/31/2011 06:26 PM, George wrote:
>>>>> ('04 Cavalier, but I think I've seen this in other Cavs over the
>>>>> years.)
>>>>>
>>>>> This car has single-piston disk brakes in the front. The piston
>>>>> pushes on the inside pad. But, the outside pad had much more wear.
>>>>> For the outside pad to operate, AIUI, the piston pushes the inside
>>>>> pad against the rotor, and the reaction pushes the piston& caliper
>>>>> inward, resulting in the outer pad pushing against the other side of
>>>>> the rotor.
>>>>>
>>>>> So, how can the outer pad wear, without corresponding wear on the
>>>>> inside pad?
>>>> sticky sliders, would be my first guess.
>>> ... So, the outside pad doesn't release after braking?
>>
>>
>> No, it's held in place by the fingers on the caliper. The caliper is
>> mounted on sliding pins. If the pins are stuck, when you hit the brakes,
>> the caliper squeezes. It uses the rotation of the disc to move it back
>> out, but if the pins are sutck, they won't.
>>
>> Calipers CAN go bad, but I have some with over 200,000 miles on them
>> because they were maintained. You can remove them, wizz them out a
>> little with a Dremel and an abrasion 'drum', grease them and have them
>> go for a while longer.
>>
>>
>>
> a brake hone?
>
> http://image.moparmusclemagazine.com...inder_hone.jpg


Those cost money. I suppose if you don't have anything that's good, but I
already had the Dremel and the sanding drums...

I also used emory cloth and a metal pin before I got the Dremel.

On Fri, 01 Apr 2011 00:36:31 +0000, Tegger wrote:

> =?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?= > wrote
> in news >
>> On Thu, 31 Mar 2011 18:27:56 -0400, Nate Nagel wrote:
>>
>>> On 03/31/2011 06:26 PM, George wrote:
>>>> ('04 Cavalier, but I think I've seen this in other Cavs over the
>>>> years.)
>>>>
>>>> This car has single-piston disk brakes in the front. The piston
>>>> pushes on the inside pad. But, the outside pad had much more wear.
>>>> For the outside pad to operate, AIUI, the piston pushes the inside pad
>>>> against the rotor, and the reaction pushes the piston& caliper
>>>> inward, resulting in the outer pad pushing against the other side of
>>>> the rotor.
>>>>
>>>> So, how can the outer pad wear, without corresponding wear on the
>>>> inside pad?
>>>
>>> sticky sliders, would be my first guess.
>>>
>>> nate
>>
>>
>> Mine, too!
>>
>>
>
> No.


Oh, I read your other pad about the inner pad being stuck, but this would
mean the puck is stuck. (I saw one the other day where the puck ahd popped
out, the pad was gone, and the puck and the rotor were worn ragged...)

In the two cases it happened to me, the puck was working just fine. The
races for the sliders were so rusty that the caliper couldn't slide and
the outer pad was being held against the rotor. On the Supra it was stuck
so hard I had smoke billowing out of the fender!

"Tegger" > wrote in message
...
> "hls" > wrote in
> news >
>
>>
>> And then service the pads.
>>
>>
>>
>
>
> The inner pad is his problem, not the caliper.
>
> --
> Tegger

Think about what you have said, and I will not flame you so badly. ;>)

On Mar 31, 3:26*pm, George > wrote:
> ('04 Cavalier, but I think I've seen this in other Cavs over the years.)
>
> This car has single-piston disk brakes in the front. *The piston pushes
> on the inside pad. *But, the outside pad had much more wear. *For the
> outside pad to operate, AIUI, the piston pushes the inside pad against
> the rotor, and the reaction pushes the piston & caliper inward,
> resulting in the outer pad pushing against the other side of the rotor.
>
> So, how can the outer pad wear, without corresponding wear on the inside
> pad?

Be safe and thorough with your brakes...
Reman calipers are cheap.
Replace them both.
HTH,
Ben

"hls" > wrote in
:

>
> "Tegger" > wrote in message
> ...
>> "hls" > wrote in
>> news >>
>>
>>>
>>> And then service the pads.
>>>
>>>
>>>
>>
>>
>> The inner pad is his problem, not the caliper.
>>
>> --
>> Tegger
>
> Think about what you have said, and I will not flame you so badly. ;>)
>


I think I'm getting flamed anyway. I just washed my brain and I think it
shrank a bit. "My bad", as they say.

What I failed to think of in my reply--after almost 30-years of working on
brakes--is that, if the sliders seize, the outer pad will fail to kick away
from the rotor, and will suffer not only excessive wear, but overheating
and sometimes a burnt odor. In my reply, I was assuming the inner pad was
seized and contributing nothing to braking effort, which I have seen
numerous times on various cars, but none of them J-bodied GMs.

If the inner pad were stuck as I originally suspected, the inner rotor
surface would have rust on it, since the inner pad would never sweep that
rust away.

What the OP needs to do is pull his brakes apart and examine every part of
them: if the pins are sticking; if the pads are sticking; if the piston
does not push back in easily.

If you decide to flame me, use a votive candle or something small like
that.

--
Tegger