Brake pad wear at a slanted angle
03-13-2008, 09:55 AM
#1
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Brake pad wear at a slanted angle
My front brake pads were installed couple month ago without glueing it to the caliper. I noticed that the pads were wearing away at an angle (more wear on far edge when looking from the center of the hub).
My car was in the shop for other repair yesterday and my mechanic kindly put some glue on the pads so that it sticks to the caliper. Now the inner edge of the pad (with less wear) is the surface that gets worn (touches the rotor) first, but it makes a very very annoying screeching sound when driving (except when braking). It makes enough noise to draw attention from everyone in the block.
Should I just un-glue the pads and let it wear out at an angle without any noise? Is that bad for the rotor? Or is there a way to get rid of the noise? Thanks
My car was in the shop for other repair yesterday and my mechanic kindly put some glue on the pads so that it sticks to the caliper. Now the inner edge of the pad (with less wear) is the surface that gets worn (touches the rotor) first, but it makes a very very annoying screeching sound when driving (except when braking). It makes enough noise to draw attention from everyone in the block.
Should I just un-glue the pads and let it wear out at an angle without any noise? Is that bad for the rotor? Or is there a way to get rid of the noise? Thanks
03-13-2008, 10:18 AM
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I have never seen a brake pad glued before, are you talking about brake squeel gels and such?
Sounds like they didn't put the pads in correctly to start, or you have a piston that is not working or the guide pins are not moving to let the pads seat flush.
03-13-2008, 10:41 AM
#4
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"Pad glue" will not hold the pad to the caliper faces under braking forces. It is only...
intended to be a vibration damper. Your caliper piston return distance is insufficient to retract your canted pad from the rotor.
What is the caliper's preventative maintaince history, regular biennial fluid flushes? If not, you need a four wheel caliper overhaul, fluid flush, and new square pads.
What is the caliper's preventative maintaince history, regular biennial fluid flushes? If not, you need a four wheel caliper overhaul, fluid flush, and new square pads.
03-13-2008, 10:49 AM
#5
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Something is wrong. Start over.
Glue or no glue--and I take it you mean the anti-squeal type stuff you put on the metal backing--they should not wear off angle to any measurable degree.
If they are, causes could be a basic misinstall of the pads, a badly worn rotor, or maybe a failing wheel bearing that has enough play there is a pretty serious wobble. Low probability stuff are things like the capier somehow being cracked or the caliper bracket being misinstalled or loose, or the whole hub housing to which it bolts being bent or flawed. Hard to say without going over it live, but your description says something is clearly wrong. Glues or duct tape aren't the solution, especially on failure critical components like brakes.
If they are, causes could be a basic misinstall of the pads, a badly worn rotor, or maybe a failing wheel bearing that has enough play there is a pretty serious wobble. Low probability stuff are things like the capier somehow being cracked or the caliper bracket being misinstalled or loose, or the whole hub housing to which it bolts being bent or flawed. Hard to say without going over it live, but your description says something is clearly wrong. Glues or duct tape aren't the solution, especially on failure critical components like brakes.
03-13-2008, 11:15 AM
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i do have a bad rotor. I had ceramic pads on..
soft stock rotors, and the pads must have eaten into the rotor. The rotor has uneven grooves now. I just ordered a new set of rotors.
New rotors with the slanted-worn brake pad: would that be fine?
New rotors with the slanted-worn brake pad: would that be fine?
03-13-2008, 11:27 AM
#7
AudiWorld Super User
New, previously undisclosed info! Soft stock rotors, you're guessing! Don't change rotors with...
new pads until you overhaul your calipers. You need to find a new wrench!
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