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328 Braking question/ concern

Discussion in 'Technical Q&A' started by spirot, Dec 14, 2006.

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  1. spirot

    spirot F1 World Champ

    Dec 12, 2005
    15,176
    Atlanta
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    Tom Spiro
    #1 spirot, Dec 14, 2006
    Hi all, I have an 86 328 with about 29K miles and was driving on the highway yesterday and noticed when I put my brakes on the pedal feels like its vibrating a bit.. this is a Non ABS car, so I know its not that... seems like the disks may be warped.... but from what ... its been sitting for about a week... never noticed it before...

    question is - brake issue or wheels needing balanced? only notices on the highway coming down from anywhere above 65 70mph????

    Any ideas?
     
  2. tamf328

    tamf328 Formula Junior

    Mar 9, 2005
    477
    #2 tamf328, Dec 14, 2006
    I had a problem like that on few cars.
    from high speed lightly press on the brake pedal if the front rotors are
    warpped you can kind of feel it in the steering wheel. a slight juttering.

    also driving slowly and bringing the car to a stop with light pressure on the
    brake can some times show up a warpped rotor. the car will surge.

    may be there is rust or dirt on the rotors....
     
  3. miketuason

    miketuason F1 World Champ
    Owner Silver Subscribed

    Feb 24, 2006
    15,828
    Cerritos, CA.
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    Mike
    #3 miketuason, Dec 14, 2006
    Tom, mine had the high speed brake vibration, after having it resurfaced (front rotors only) No more vibration at any speed. So yours probably just need resurfacing, make you check for minimum thickness.
     
  4. DGS

    DGS Seven Time F1 World Champ
    Rossa Subscribed

    May 27, 2003
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    DGS
    #4 DGS, Dec 14, 2006
    If it just happened a couple of times, it might be surface rust -- especially if the brakes were wet when it was put away. That should rub off after a few stops.

    If it persists, you need to look further.
     
  5. Dino2010

    Dino2010 F1 Rookie
    BANNED

    Nov 20, 2006
    4,852
    Belgium
    #5 Dino2010, Dec 15, 2006
    Normally the rustcoat should really be gone after few times hard breaking! The rotors are probably worn, beware they are very expensive when you buy them at an official dealer!
    Regards!
     
  6. spirot

    spirot F1 World Champ

    Dec 12, 2005
    15,176
    Atlanta
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    Tom Spiro
    #6 spirot, Dec 15, 2006
    Thanks guys, I drove the car to work today and it dose not seem so bad... I stomped on the brakes a couple of times you can feel it just barely... most likely is the disks are a bit warpped...I'll have them machined ... was just wondering if this is common or not... I had a 300ZX TT with the big brembo brake kit on it and they used to warpp every spring - stored the car in an un heated garage in PA...Nissan used to machine them for me for free...

    I know what you mean about the dealer prices... labor is not $125/ hr!!!
     
  7. John Harry

    John Harry Formula Junior

    Sep 8, 2005
    328
    Pittsburgh PA
    Full Name:
    John Harry
    #7 John Harry, Dec 15, 2006
    Also, make sure the wheel bolts are torqued to spec or a little higher. Excess and/or uneven torque contributes to warped rotors.
     

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