Grinding Brakes??

Discuss any problems, warranty, repair, or replacement issues you are having with your Vibe & Matrix
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Mr. Joe
Posts: 48
Joined: Fri Jun 01, 2007 11:46 am

Grinding Brakes??

Post by Mr. Joe »

Okay.. fist let me mention that I understand how rotors work, and I know all about how they can develop rust overnight when in very wet/humid areas, and that this can cause a grinding sound when braking.I expect this, it's normal. What I also expect is that it wears off very quickly and then dosen't cause a problem. (typically by the time I get to the end of the driveway, but at least by the time I get to the end of the road.)Problem: The grinding noise dosen't go away. I have inspected the rotors and cannot see any additional wear or unusual conditions. I haven't taken it apart yet to look at the pads, I will probably let the dealer do that because I only have 8K on the car yet.Anyone have any ideas? brakes seem a bit soft to me, but they did on the day I picked it up. (especially when compared to the performance brakes on my Vue.) I haven't noticed that they are any softer than they were originally.
2007 Frosty Pontiac Vibe, picked it up 6-01-071480 milesLife is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming..."WOW! What a ride!"
Sublimewind
Posts: 5140
Joined: Thu May 24, 2007 4:44 am

Re: Grinding Brakes?? (Mr. Joe)

Post by Sublimewind »

Is it coming from the front or the rear? Have you dissasembled them to have a good look-see? It could be a crappy pad/shoe depending on which end of the car(i'm going to say front cause you mention pads)Is there any scoring/groves on the rotors... have you looked at the BACK sides of the rotors? If you look for my front brake tutorial, you can see and I mention in one of the pics some odd wear on the back side of the rotors.... maybe something to consider... Edit, i'll do you one better... http://forums.genvibe.com/zero...69190
Mr. Joe
Posts: 48
Joined: Fri Jun 01, 2007 11:46 am

Post by Mr. Joe »

There was some pitting on both sides, but strangely, it's gone now, and brakes are behaving normally again. Just odd. Was starting to think there was a defect in the rotors, but now I dunno. Will keep an eye on them.
2007 Frosty Pontiac Vibe, picked it up 6-01-071480 milesLife is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming..."WOW! What a ride!"
ajconover
Posts: 50
Joined: Fri Apr 06, 2007 7:25 am

Re: Grinding Brakes?? (Mr. Joe)

Post by ajconover »

I too get a lot of grinding in the morning (more than other cars I've owned), especially if I haven't driven in a few days and it's been wet. However, I do notice that road salt seems to make it a lot worse. If I've been driving around on recently salted roads that were still wet, and the car sits for a weekend, then the brake grinding seems to take a lot longer to go away.( It just makes me cringe to think about what the salt is doing to the rest of my car )
2006 Stealth two-tone Vibe -- Automatic -- "Preferred Package" -- Otherwise, stock.
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