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Thread: I just noticed the slots on my Rotors

  1. #1
    Join Date
    May 2006
    Location
    NH
    Posts
    2,062

    Default I just noticed the slots on my Rotors

    Are they supposed to be pointing the other way? Did the guys i had put them on put them on the wrong sides? Without looking at the other side I just thought going in to the spin like that is probably why i get some slight humm when braking.. Not neccesarliy wearing the pads more but While I'll look at the driver's side tomorrow to se e if they are pointing into the spin too and if so try swapping them so they trail the spin

    1995 540i Manual build 1/95

  2. #2
    Join Date
    Oct 2004
    Location
    Honolulu
    Posts
    3,105

    Default Chronic

    Buwhahahahaaaa.

    step away from the bong

    Relax....


    Vee ave vays of dealing vid your kind...........

  3. #3
    Join Date
    May 2006
    Location
    NH
    Posts
    2,062

    Default

    Seriously though my hub centers are faded... where's my metric ruler....
    1995 540i Manual build 1/95

  4. #4
    Join Date
    Sep 2007
    Location
    Seattle, WA
    Posts
    1,036

    Default

    Not all slotted rotors are directional. Meaning you might've gotten a set that's got identical right & left rotors. The nicer, more expensive ones have mirror matched slots so that there's a proper left and right rotor. And yeah, they're usually installed so that the slot sweeps back, not forward.
    Cosmos Black/Black 1995 540iA M-Sport
    BMW Individual Exclusive Edition, 1 of 65 total, 9/25/95 Build

  5. #5
    Join Date
    Feb 2007
    Location
    New Forest, ,UK,
    Posts
    794

    Default

    The slight hum may well be the start of a bearing going, not rotors. Try a good hard stop from 120+ and see if noise appears at about 70-ish, no noise/hum/throb, no problem.

  6. #6
    Join Date
    Dec 2003
    Location
    PA
    Posts
    5,403

    Default

    drilling and slotting rotors WILL make a noise when braking - no way around it.

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