Issues with stuff stuck between brake pad and rotor? - Club Crosstrek | Subaru XV Crosstrek Forums
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Old 01-10-2016, 09:45 PM   #1
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Default Issues with stuff stuck between brake pad and rotor?

Recently I noticed a groove in my driver's side front rotor. Being still under warranty, I brought my XV in for dealer to take a look. They inspected and turned rotor to remove groove. It was covered so no $ loss there. The reason? They said "grit" got stuck between brake pad and rotor causing a groove. How does that happen? This is the first time I've ever seen that in disc brakes.

Just this week I was driving back from Mammoth on snow packed roads with gravel/cinders laid down by Caltrans. My XV is the best car I've ever owned driving in snow by far! 3/4 of way down the grade my passenger side rotor started squealing. Something was stuck in the caliper. It took awhile of braking and accelerating to break it free.

Is this a defect in the disc brake system? How is this possible that crap gets stuck between brake pad and rotor?

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Old 01-11-2016, 03:28 AM   #2
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It's not a defect. Murphy's Law applies to damn near anything, and although there's a low chance of stuff getting sandwiched between the pads and rotors, it does still happen. If you don't want that to happen, you could either custom-engineer a way to cover the rotor, however, it would cause your vehicle to be unsafe to drive as it would be detrimental to the brake system's ability to shed heat.

If it happens again, and persists, consider taking the debris out yourself (if you know enough about brakes) or take it to a reputable automotive service shop to address the problem.
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Old 01-11-2016, 05:00 AM   #3
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thanks AWDfreak,
I've worked on brakes on all my previous cars. I'm just nervous on wrenching on my XV until the warranty expires. I don't want any issues with the dealer saying I did something to void the warranty. Totally different topic. Why does the dealer tighten the oil drain plug with an impact wrench? Was in a pinch for time so I decided to change my oil myself (which I've done to every car I ever owned) and couldn't get the plug off, even with a giant torque wrench. I gave up, made a service appointment and will ask why they tighten the plug so ridiculously tight.
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Old 01-11-2016, 08:04 PM   #4
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That's an understandable viewpoint. Though the tightening of an engine oil drain plug with an impact wrench is absolutely inexcusable. The oil pan drain plug doesn't require a lot of torque, and it shouldn't take a giant torque wrench to attempt to remove it.
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