Rotor Squeal
Oct 13, 2014 | 08:02 AM
#1
Thread Starter
Newbie
Joined: Feb 2014
Posts: 61
Likes: 26
From: SLC Utah
Rotor Squeal
Hey,
I have an 05 Evo that had brand name slotted Rotors on it(unsure of mileage), I recently just replaced the pads with Hawk HPS. There was a slight squeal before I replaced the pads but I figured its because they were so low @ 1-2/32.
Anyways new pads, greased, installed on the old rotors, now when the brakes 'warm up' - 20min driving maybe - They start obnoxiously squealing - sounds like if the wear sensor is dragging.
Now I thought I had greased the pads and hardware up enough, and I feel like poor lubrication wouldnt cause a squeal this loud. I was thinking maybe it could be the rotors since they have life on them maybe they are starting to glaze and the new pads just made it worse?
Before I throw new rotors on it I just wanted to get some other opinions.
Should rotors on these cars be replaced more often? I am used to my hondas which if you turn the rotors last a few pad sets.
Thanks!
I have an 05 Evo that had brand name slotted Rotors on it(unsure of mileage), I recently just replaced the pads with Hawk HPS. There was a slight squeal before I replaced the pads but I figured its because they were so low @ 1-2/32.
Anyways new pads, greased, installed on the old rotors, now when the brakes 'warm up' - 20min driving maybe - They start obnoxiously squealing - sounds like if the wear sensor is dragging.
Now I thought I had greased the pads and hardware up enough, and I feel like poor lubrication wouldnt cause a squeal this loud. I was thinking maybe it could be the rotors since they have life on them maybe they are starting to glaze and the new pads just made it worse?
Before I throw new rotors on it I just wanted to get some other opinions.
Should rotors on these cars be replaced more often? I am used to my hondas which if you turn the rotors last a few pad sets.
Thanks!
Oct 14, 2014 | 02:51 PM
#4
Newbie
Joined: Aug 2014
Posts: 9
Likes: 0
From: Central Wisconsin
Hawk HPS are known for squealing, it's completely normal. If you absolutely can't stand it, I've heard of people beveling the sides of the pad to reduce noise, but haven't tried it myself. No need to buy new rotors.
Oct 14, 2014 | 06:38 PM
#5
Well I would venture a guess that the pads that you had previously were a different brake pad compound.
So whats happening is that the new brake compound is trying to transfer onto the rotor. I think this is what is causing the squealing. It wont matter how much you grease up the shims because that's not the issue. The issue is that the old brake compound has a transfer layer on the rotor which is different than your new brake compound.
Check the rotor wear if you can. Usually a rotor that has been used a lot will start to form a lip on the edge of the rotor.
Easy way to fix this would be to have all the rotors resurfaced but then you still have to go through another bedding procedure.
So whats happening is that the new brake compound is trying to transfer onto the rotor. I think this is what is causing the squealing. It wont matter how much you grease up the shims because that's not the issue. The issue is that the old brake compound has a transfer layer on the rotor which is different than your new brake compound.
Check the rotor wear if you can. Usually a rotor that has been used a lot will start to form a lip on the edge of the rotor.
Easy way to fix this would be to have all the rotors resurfaced but then you still have to go through another bedding procedure.
Oct 16, 2014 | 07:25 AM
#6
Thread Starter
Newbie
Joined: Feb 2014
Posts: 61
Likes: 26
From: SLC Utah
Well I would venture a guess that the pads that you had previously were a different brake pad compound.
So whats happening is that the new brake compound is trying to transfer onto the rotor. I think this is what is causing the squealing. It wont matter how much you grease up the shims because that's not the issue. The issue is that the old brake compound has a transfer layer on the rotor which is different than your new brake compound.
Check the rotor wear if you can. Usually a rotor that has been used a lot will start to form a lip on the edge of the rotor.
Easy way to fix this would be to have all the rotors resurfaced but then you still have to go through another bedding procedure.
So whats happening is that the new brake compound is trying to transfer onto the rotor. I think this is what is causing the squealing. It wont matter how much you grease up the shims because that's not the issue. The issue is that the old brake compound has a transfer layer on the rotor which is different than your new brake compound.
Check the rotor wear if you can. Usually a rotor that has been used a lot will start to form a lip on the edge of the rotor.
Easy way to fix this would be to have all the rotors resurfaced but then you still have to go through another bedding procedure.
I ordered a set of centric blanks for front/back & I will scuff up the pads tonight so hopefully it was just the rotors. Thanks for the input guys!!
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