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Uneven Front Pad Wear

pwsigmund

By pwsigmund
in Ask A GM Technician

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pwsigmund Enthusiast

pwsigmund

Posted
Posted

When I changed my front brakes a couple weeks ago, this is what I found on the right front. If you look closely, you can see the pads are worn to the metal on one end, and almost unworn on the other. At first I assumed the pads had just gotten hung up on one side and wore unevenly. I cleaned and lubricated everything, replaced pads and rotor and put it all back together. When I compressed the (dual) pistons with clamps, they pushed right in and were not stuck. Now I'm wondering if there's a bigger problem. I am hearing a grinding sound when I come to a stop, in the front, and am beginning to think I've got bad bearings.

 

Has anyone seen anything like this? I didn't notice excessive looseness in the wheel. What do you think?

 

IMGP0010-vi.jpg

Nytemare Senior Enthusiast

Nytemare

Posted
Posted

Looks like sticking slider pins or uneven pressure in the pistons. I would say your caliper is toast. Keep an eye on the new brakes, this could be the cause of your grinding.

 

I haven't seen bearings do this...but you never know.

minibike132 Senior Enthusiast

minibike132

Posted
Posted

The inboard pad was hung up on the slide for whatever reason. If the caliper was bad the outboard pad would be similarly worn, not as drastically but similarly with the lower portion having less pad then the upper.

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
The inboard pad was hung up on the slide for whatever reason. If the caliper was bad the outboard pad would be similarly worn, not as drastically but similarly with the lower portion having less pad then the upper.

 

True that.

I was thinking that the bottom piston was not retracting all the way actually....but I believe the out board one would be worn in that case too. You Agree?

minibike132 Senior Enthusiast

minibike132

Posted
Posted
The inboard pad was hung up on the slide for whatever reason. If the caliper was bad the outboard pad would be similarly worn, not as drastically but similarly with the lower portion having less pad then the upper.

 

True that.

I was thinking that the bottom piston was not retracting all the way actually....but I believe the out board one would be worn in that case too. You Agree?

 

 

Yes I agree.

gave20 Senior Enthusiast

gave20

Posted
Posted

You have rust and debris under your stainless steel slider clips. You need to clean all the junk off the clips and clean and remove all the rust and debris then repaint the area under the clips. If you live in the salt belt this should be done once a year.

 

Read heymccall's posts in this thread.

brake maintenance

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