Uneven break pad wear.
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Uneven break pad wear.
On my left wheel, the inner pad is wearing slanted. The bottom part where the warning clip isn't is warn more than the top part where the clip is. If it keeps wearing like this, the metal of the pad will contact before the safety clip.
Is it because I wasn't running shims? Everything was cleaned properly. The outer pad is perfect btw, suggesting a piston problem perhaps. The rotors are brembo and the pads are nissin/aem, which didn't come with shims.

Is it because I wasn't running shims? Everything was cleaned properly. The outer pad is perfect btw, suggesting a piston problem perhaps. The rotors are brembo and the pads are nissin/aem, which didn't come with shims.
Last edited by Cleft_Asunder; Nov 17, 2009 at 03:36 PM.
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Re: Uneven break pad wear.
I lubed up everything with brake grease because I seem to have not done it upon install, perhaps causing the inner pads to rub when not braking. Both the inner pads are worn exactly the same way.
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Re: Uneven break pad wear.
u dont need to run shims if they didnt come with them. you should have HAWKS HPS pads a try. they are the best pads ive used (that are quiet and low on dust). (all shims do is take the vibration and quiet the braking process, but only if they are applied with grease correctly)
as for rotors, do u have slotted or drilled rotors? because if u do, THAT is ur reason.
what you can do is take ur caliper apart (the pistons, etc) and give them a nice deep clean with strong degreaser, let them dry and put everything back together)
as for rotors, do u have slotted or drilled rotors? because if u do, THAT is ur reason.
what you can do is take ur caliper apart (the pistons, etc) and give them a nice deep clean with strong degreaser, let them dry and put everything back together)
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Re: Uneven break pad wear.
u dont need to run shims if they didnt come with them. you should have HAWKS HPS pads a try. they are the best pads ive used (that are quiet and low on dust). (all shims do is take the vibration and quiet the braking process, but only if they are applied with grease correctly)
as for rotors, do u have slotted or drilled rotors? because if u do, THAT is ur reason.
what you can do is take ur caliper apart (the pistons, etc) and give them a nice deep clean with strong degreaser, let them dry and put everything back together)
as for rotors, do u have slotted or drilled rotors? because if u do, THAT is ur reason.
what you can do is take ur caliper apart (the pistons, etc) and give them a nice deep clean with strong degreaser, let them dry and put everything back together)
Re: Uneven break pad wear.
When u put the slide pins back make sure that they actually work. Sometimes the boots get air pockets in them. I dont know any other possibilities. You can try new pads like sleepy said. Btw, how are those rotors, do you like them?
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Re: Uneven break pad wear.
humm i didnt notice u took out thsoe two pins.
curious, why did u take out those pins? it is unnecessary. remove the other two bolts instead and u wont have to mess with it.
if u took em out, u needa really rebleed ur system well (preferably with a vacuum pump to get all the air bubbles out)
those air bubbles are what is probably causing the uneven pressure, and thus resulting in uneven pad wear.
curious, why did u take out those pins? it is unnecessary. remove the other two bolts instead and u wont have to mess with it.
if u took em out, u needa really rebleed ur system well (preferably with a vacuum pump to get all the air bubbles out)
those air bubbles are what is probably causing the uneven pressure, and thus resulting in uneven pad wear.
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Re: Uneven break pad wear.
humm i didnt notice u took out thsoe two pins.
curious, why did u take out those pins? it is unnecessary. remove the other two bolts instead and u wont have to mess with it.
if u took em out, u needa really rebleed ur system well (preferably with a vacuum pump to get all the air bubbles out)
those air bubbles are what is probably causing the uneven pressure, and thus resulting in uneven pad wear.
curious, why did u take out those pins? it is unnecessary. remove the other two bolts instead and u wont have to mess with it.
if u took em out, u needa really rebleed ur system well (preferably with a vacuum pump to get all the air bubbles out)
those air bubbles are what is probably causing the uneven pressure, and thus resulting in uneven pad wear.
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Re: Uneven break pad wear.
humm i didnt notice u took out thsoe two pins.
curious, why did u take out those pins? it is unnecessary. remove the other two bolts instead and u wont have to mess with it.
if u took em out, u needa really rebleed ur system well (preferably with a vacuum pump to get all the air bubbles out)
those air bubbles are what is probably causing the uneven pressure, and thus resulting in uneven pad wear.
curious, why did u take out those pins? it is unnecessary. remove the other two bolts instead and u wont have to mess with it.
if u took em out, u needa really rebleed ur system well (preferably with a vacuum pump to get all the air bubbles out)
those air bubbles are what is probably causing the uneven pressure, and thus resulting in uneven pad wear.
It is a very strange thing. Both inner pads are wearing at exactly the same rate but mirroring each other.
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Re: Uneven break pad wear.
u dont need to run shims if they didnt come with them. you should have HAWKS HPS pads a try. they are the best pads ive used (that are quiet and low on dust). (all shims do is take the vibration and quiet the braking process, but only if they are applied with grease correctly)
as for rotors, do u have slotted or drilled rotors? because if u do, THAT is ur reason.
what you can do is take ur caliper apart (the pistons, etc) and give them a nice deep clean with strong degreaser, let them dry and put everything back together)
as for rotors, do u have slotted or drilled rotors? because if u do, THAT is ur reason.
what you can do is take ur caliper apart (the pistons, etc) and give them a nice deep clean with strong degreaser, let them dry and put everything back together)
I wanted to mention that sometimes when I brake, the peddle fluctuates and feels like my rotors are warped, but of course they aren't. Does that indicate air in the system?
Last edited by Cleft_Asunder; Nov 20, 2009 at 10:48 PM.
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Re: Uneven break pad wear.
The rotors work fine and I like them. I don't think they are any better or worse than OEM, so if you have stocks then just resurface them because they are quality. (that's what I should have done) No reason to get excited about rotors unless you race.
Re: Uneven break pad wear.
I did some research on this because I found it interesting. The slider pins are what center the caliper, so what may have happened is because you did not grease them during the pad change it caused the caliper not to center properly. Which would cause uneven wear on both pads. Also, when you remove the pins make sure they are free from scuff marks, rust, and corrosion. And use some kind of synthetic brake grease when you do lube them. Also, they recommend that if you do find uneven wear early on to switch the inner/outer brake pads to even it back out, but your pads may be beyond that point. I'd hate to try and help you and mess up your rotors.
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Re: Uneven break pad wear.
I did some research on this because I found it interesting. The slider pins are what center the caliper, so what may have happened is because you did not grease them during the pad change it caused the caliper not to center properly. Which would cause uneven wear on both pads. Also, when you remove the pins make sure they are free from scuff marks, rust, and corrosion. And use some kind of synthetic brake grease when you do lube them. Also, they recommend that if you do find uneven wear early on to switch the inner/outer brake pads to even it back out, but your pads may be beyond that point. I'd hate to try and help you and mess up your rotors.
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Re: Uneven break pad wear.
the pins i was talking about have that rubber part accordion thing. it wasnt necessary to take out. the other 2 bolts would have been better
Re: Uneven break pad wear.
Sleepy if your talking about the same pins on the caliper as I am you definitely don't need to bleed your brake system after.
Here is the pins I'm talking about. It's from an F250 but you get the idea.
http://images.google.ca/imgres?imgur...%3Den%26sa%3DG
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Re: Uneven break pad wear.
Ohhh, very interesting. No I've never taken those out! I always thought they were referring to the "pin" that the caliper slides on and off on. I'm doing a trany swap today so I will check and clean those pins. Thanks again.
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Re: Uneven break pad wear.
On my model, there is only one removable pin located on the bottom. The top part is a similar design but the pin is attached to the bracket with a bolt. (see second pic on top) I lubed up both.
Other than that, when I get some time I will undo both pistons and clean them. Perhaps they are dirty or the grease is too old on both.
Thanks.
Other than that, when I get some time I will undo both pistons and clean them. Perhaps they are dirty or the grease is too old on both.
Thanks.
Re: Uneven break pad wear.
Yes, those are the bolts I mentioned in my first post. They are slide pins, if you over grease them or get too much grease in those black boots sometimes it causes them to not work correctly. The pins are supposed to push in and spring out, but sometimes if there is too much grease they dont spring out again and cause problems.
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Re: Uneven break pad wear.
The slide pins had a bit of grease in there but I added more. Any way, I'm waiting till the pads wear out before taking the piston apart, so it will be a while before I can update this post.
Re: Uneven break pad wear.
I don't think it's a piston thing. I don't hear too often of people taking it apart and cleaning it. It's worth a shot though if they are still wearing uneven.
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Re: Uneven break pad wear.
Ahh, finally found this post. That's what happends when you spell "brake" wrong.
So, I cleaned the calipers yesterday then did a complete bleeding. I cleaned the calipers because I was confident they were binding because of being dirty. I installed new boots over the pistons, a new o-ring and a metal clip. After the install, the car was very responsive --no more brake binding. As hard as it is to believe, the brakes have been slowing my car down for years, though I was still getting good MPG. But now my car feels so peppy it's great. Not only that, but my alignment issue has been solved. The car goes straight on the freeway now instead of left.
The question is, will the uneven brake pad wear correct itself? Obviously, this is what caused it. The piston was resting on the inner pads. I will update this post in the future to answer the question.
So, I cleaned the calipers yesterday then did a complete bleeding. I cleaned the calipers because I was confident they were binding because of being dirty. I installed new boots over the pistons, a new o-ring and a metal clip. After the install, the car was very responsive --no more brake binding. As hard as it is to believe, the brakes have been slowing my car down for years, though I was still getting good MPG. But now my car feels so peppy it's great. Not only that, but my alignment issue has been solved. The car goes straight on the freeway now instead of left.
The question is, will the uneven brake pad wear correct itself? Obviously, this is what caused it. The piston was resting on the inner pads. I will update this post in the future to answer the question.
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Re: Uneven break pad wear.
FYI, an alignment costs 186 at honda, a total ripoff. It's part of her maintenance plan. It's probably aligned correctly, just that the brakes are throwing it off.
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Re: Uneven break pad wear.
new pads will bed into the rotor over 500-1000 miles, even if you dont machine it. in your case tho, i think its too extreme and you will need new pads.
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Re: Uneven break pad wear.
seems like that would be caused by sticking calipers, if those pins are too tight or binding. but im not exactly sure. ive also seen cheap pads cause this because they are slightly too thick. and once you use them and they get worn down, the rubbing goes away. but i dont think its a good idea to drive with dragging brakes like that. how bad is it, can you still turn the front wheels with your hand? does it turn fairly well but you hear some scraping? that is not as big a deal.



Now get that Element all fixed up!