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Pad not biting the rotor properly

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Old Jan 27, 2012 | 11:37 AM
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Pad not biting the rotor properly

After I replaced my front pads, I did break in, it was fine. But after driving in the rain one time, I let the car sit for a few days, the rotor and caliper were seized but I manage to break them loose. But ever since that day I start noticing the driver side pads are not biting the full surface of the rotor; the outer ring don't have contact with the pads. Does anyone know why?

The shims are installed FYI.

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Old Jan 27, 2012 | 11:46 AM
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Did you get your rotors turned PRIOR to installing the new pads? Doesn't look like it in the picture but I'm not sure.

EDIT: Added below...
Through use, the rotors wear down unevenly. When you install new pads without turning your rotors, this is a common result because the new flat pads won't contact the ful surface area on the rotor. Sometimes it'll work out just fine (i've done this on an old van I owned and it worked then), but not always.

Last edited by SilverShadow03; Jan 27, 2012 at 12:00 PM.
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Old Jan 27, 2012 | 12:05 PM
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Originally Posted by SilverShadow03
Did you get your rotors turned PRIOR to installing the new pads? Doesn't look like it in the picture but I'm not sure.

EDIT: Added below...
Through use, the rotors wear down unevenly. When you install new pads without turning your rotors, this is a common result because the new flat pads won't contact the ful surface area on the rotor. Sometimes it'll work out just fine (i've done this on an old van I owned and it worked then), but not always.
NO, I didn't turn the rotor, so how do I turn the rotors, do you mean to resurface it?

Last edited by fugiwara; Jan 27, 2012 at 12:10 PM.
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Old Jan 27, 2012 | 12:15 PM
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Did you bed the pads? That will get them to wear evenly, and also get rid of any old material on the rotor.
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Old Jan 27, 2012 | 12:23 PM
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Originally Posted by tony_b
Did you bed the pads? That will get them to wear evenly, and also get rid of any old material on the rotor.
I am going to get rid of the older materials on the rotor, what do you mean by bed the pad? sorry I don't know some of the terms.
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Old Jan 27, 2012 | 12:40 PM
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Bedding Pads:
- 10 stops from 30 mph to 10 mph at half braking power.
Do not drag your pads during these stops. Drive for a few minutes.

- 5 consecutive stops from 60 mph to 10 mph under hard braking.

Once you're done. Drive home without using brakes as much as possible. Park car without the parking brake and let cool for at least 1 hour.

You may smell brake pads during bedding. Completely normal.

** try not to come to a complete stop after the hard braking. I usually do it at night on a long straight road with little to no traffic.

edit: That was taken from here:
https://www.evolutionm.net/forums/ev...ct-thread.html

Last edited by tony_b; Jan 27, 2012 at 12:41 PM. Reason: added link
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Old Jan 27, 2012 | 03:43 PM
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Thanks Tony!
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Old Jan 27, 2012 | 03:55 PM
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Originally Posted by fugiwara
Thanks Tony!
You're welcome.
I do that whenever I change pads, or if the brakes start to "shimmy" a little on the highway from pad buildup. It usually smooths things right out.
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Old Jan 27, 2012 | 06:24 PM
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If you say the caliper was seized then it could be a bad caliper not operating correctly causing your issue. In that pic it honestly looks to me like you just need to bed in the new pads a little more. Looks like it started to get a bit of transfer layer on the rotor.
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Old Jan 28, 2012 | 06:58 PM
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Originally Posted by TommiM
If you say the caliper was seized then it could be a bad caliper not operating correctly causing your issue. In that pic it honestly looks to me like you just need to bed in the new pads a little more. Looks like it started to get a bit of transfer layer on the rotor.
Tommi, it does have transfer layer on the rotor, the caliper was seized due to one day driving in the rain and I parked in the garage right after the rain and didn't drive for few days.

I am going to bed in the new pads a little more.
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Old Jan 28, 2012 | 11:18 PM
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It is interesting that the pad isn't hitting that small area on the rim of the rotor. The only way to know why is to pull the wheel and look.
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Old Jan 29, 2012 | 10:55 AM
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Make sure all the metal to metal areas are properly greased and any slides work properly.
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Old Jan 29, 2012 | 08:14 PM
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Originally Posted by AJCaron12
Make sure all the metal to metal areas are properly greased and any slides work properly.
you talking about the caliper pins and shims?
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Old Jan 29, 2012 | 08:31 PM
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It's perfectly normal ignore these people please. Does it stop? Save yourself a big headache.
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Old Jan 30, 2012 | 05:13 PM
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Originally Posted by cfdfireman1
It's perfectly normal ignore these people please. Does it stop? Save yourself a big headache.
Yes it does stop. It does give me headache
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