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Thread: Brake fluid

  1. #1
    Registered User jgr451's Avatar
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    Question Brake fluid

    I fixed the problem of the front brakes on my 1984 R100RT locking on by new pads and braided steel lines.In the course of the changes,the mechanic used DOT3 instead of DOT4(clearly marked thus on the front and rear master cylinders!) I drew it to his attention and have made some enquiries,the upshot of which is that this is not a big problem as the only difference is the boiling loint.
    Any opinions out there as to whether I should be concerned and immediatley flush the DOT 3?
    Thanks!!

  2. #2
    Blocking the slow lane
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    The only difference is boiling point. Then again, if you are paying for service, the least they can do is finish the job correctly.
    Jon Diaz
    BMW K75/K12GT
    BMWMOA Ambassador

  3. #3
    RIDERR1150GSADV
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    Unhappy

    I agree the least these guys can do is to make sure they put the right fluids in as the boiling point of DOT 4 is better and will prevent premature fading on hot days or sustained braking

  4. #4
    Registered User jgr451's Avatar
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    Talking

    Thanks for the advice guys.Now that you mention it,I was surprised at how quickly the back brake went away when I was in the mountains recently on a really hot day.I was not using the fronts as I did not want them to seize at a bad time and place.I believe the DOT 3 was in the back then.
    This mechanic is competent but he is young and it is not a BMW or even a bike shop!
    Still,it does say what to use on the cap,and I had supplied a can of DOT4 which he forgot about until I reminded him.He will change the fluid whenI insist.
    What's a guy to do?
    And what happened to Boxxergirrlie?

  5. #5
    Focused kbasa's Avatar
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    Originally posted by jgr451
    And what happened to Boxxergirrlie?
    I've seen her lurking here during the day.

    That picture she made of the Las Vegas thang still cracks me up.
    Dave Swider
    Marin County, CA

    Some bikes. Some with motors, some without.

  6. #6
    Registered User jgr451's Avatar
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    Yeah that was a really good one!A computer literate girrlie!

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