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Nissan Maxima: Brake noise - slotter rotors?

  1. 06-11 03:24 AM #1
    Filipp
    Guest

    Brake noise - slotter rotors?

    '97 Maxima SE, 170k miles.

    When the car had 122k miles, I replaced the front stock rotors with
    Powerslot slotted rotors, and put in new OEM pads. All was well, until
    recently I started hearing grinding or whirring noise under braking. I
    checked the pads and the rotors, and there are no visible defects, the pads
    are worn about half way.

    I'm thinking, could this be due to the fact that the new pads have slanted
    edges, which only go approximately half way into the thickness of the new
    pad?

    Thanks for any insight!

    Fil


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  2. 06-11 06:31 AM #2
    Steve
    Guest

    Re: Brake noise - slotter rotors?

    Filipp Stepanov wrote:
     


    The leading edges of the pads are probably catching the slots, you will need
    to bevel the leading edges of the pads to stop it.

    --

    Steve

    http://www.atlantaracing.com
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  3. 06-12 02:47 AM #3
    Filipp
    Guest

    Re: Brake noise - slotted rotors?

    Thanks, that's what I was suspecting too. Is it going to affect braking if I
    leave it the way it is? I am not too worried about the noise.

    "Steve T" <com> wrote in message
    news:de... 
    slanted 
    new 
    need 


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  4. 06-12 06:30 AM #4
    Steve
    Guest

    Re: Brake noise - slotted rotors?

    Filipp Stepanov wrote:
     


    Might end up chewing up the leading edge of the pads? Then again might not
    do anything.. Drilled rotors make weird noises but don't hurt the pads.
    --

    Steve

    http://www.atlantaracing.com
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  5. 06-14 04:02 PM #5
    Nirav
    Guest

    Re: Brake noise - slotted rotors?

    Steve T <com> wrote in message news:<de>... 

    I thought the original poster stated that the pads had a beveled
    "edge" already - from the first post:
     

    This wouldn't be the first time I've read about drilled/slotted rotors
    causing clicking/grinding sounds... Not really sure that there is any
    need for that sort of rotor (anything other than a blank) on our
    cars... but thats a discussion for another day.

    Just out of curiousity, are slotted rotors directional? I can imagine
    that if the slots are cut (direction of slot) in the opposite
    direction to the rotation of the disc (going forward) - you might have
    more of a grinding/cutting effect... hard to explain in words, but I
    think you get the gist right?... (most likely I'm blowing smoke )

    Nirav
    96 Max GLE, 106k
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  6. 06-15 12:34 AM #6
    Steve
    Guest

    Re: Brake noise - slotted rotors?

    Nirav J. Modi wrote:
     

    Reread the post, the pads are now worn half way down PAST the beveled part..



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    Steve

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  7. 06-15 02:06 PM #7
    Nirav
    Guest

    Re: Brake noise - slotted rotors?

    Steve T <com> wrote in message news:<de>...
     

    Yes indeed. Thanks for setting me straight Steve.

    Nirav
    96 Max GLE, 106k
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  8. 06-16 06:29 PM #8
    Filipp
    Guest

    Re: Brake noise - slotted rotors?

    Thanks for your reply,

    Yes, they are directional, they have different part numbers, and the
    boxes were marked appropriately. Though, I do see a Saab in the
    parking lot where I work with slotted rotors that look like they are
    cut in the same direction on both sides. Could be just for looks, or
    maybe someone screwed up.

    com (Nirav J. Modi) wrote in message news:<google.com>... 
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  9. 06-20 06:04 AM #9
    Mealy
    Guest

    Re: Brake noise - slotted rotors?

    Why would direction matter? My neighbor's Mercedes (C500?) has factory
    cross-drilled rotors and they have the same directional pattern on both sides -
    i.e. driver's side 'swoops' forward and the passeger side goes backwards.

    On 16 Jun 2004 11:29:32 -0700, net (Filipp Stepanov) wrote:
     
     

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  10. 06-21 03:52 AM #10
    Filipp
    Guest

    Re: Brake noise - slotted rotors?

    I don't know if it matters. From what I've read elsewhere on the web, the
    grooves help vent the gases away from the pad surface. I am just speculating
    here, but depending on where the calipers are located (on the front side of
    the rotor, or on the back side, or, in some applications, on the bottom
    side, to lower center of gravity), it may be benefical to have grooves go in
    certain direction, so that forward movement of the car helps draw the gases
    away. It may be that this is all done just for looks on a road car, hence
    the non-directional rotors on your neighbor's Mercedes. I'd imagine, their
    engineers know better. Again, I was just speculating...


    "Mealy" <not> wrote in message
    news:com... 
    sides - 
    wrote: 


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