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Which motive

Discussion in '348/355' started by f360nh, May 17, 2014.

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  1. f360nh

    f360nh Karting

    Apr 12, 2014
    210
    NH
    Full Name:
    John Q.
    #1 f360nh, May 17, 2014
    I'd like to start doing my own brake flushes -- which bleeder from the Motive line-up (or other recommendations?) would work with the F355 cap size?

    Thank you...
     
  2. bosshog8

    bosshog8 Formula Junior

    Mar 13, 2011
    448
    Pinelands NJ
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    Demetrius
    #2 bosshog8, May 17, 2014
    1100 for the motive. It's 45mm but measure yours to be sure.
     
  3. f360nh

    f360nh Karting

    Apr 12, 2014
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    John Q.
    #3 f360nh, May 21, 2014
    Ok, ordered and received the 1100 and will try it shortly.

    One question -- this bleeder will put the pressure into the brake fluid reservoir, which is great -- however, how does that pressure travel through the master cylinder and into the individual brake lines? Would I not need to constantly activate the brake pedal as well to make this whole thing work?

    TY.
     
  4. WATSON

    WATSON Two Time F1 World Champ
    Owner Rossa Subscribed

    Sep 9, 2010
    23,909
    WI
    #4 WATSON, May 21, 2014
    I have tried all kinds of bleeders over the years.

    For me, the best one is a quart mason jar with 15' of clear hose coiled in it. Poke a hole in the lid and pull the tube through.

    Connect the hose to the brake bleed screw and push the pedal. Refill the reservoir as necessary. One person operation.

    The gizmos are nice, but I have two power bleeders collecting dust.

    YMMV.
     
  5. drbob101

    drbob101 F1 Rookie
    Owner Silver Subscribed

    Nov 26, 2012
    3,821
    Tinton Falls, NJ
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    Bob Ferraris
    #5 drbob101, May 22, 2014
    Griots vacuum bleeder which is nothing special in terms of uniqueness works like a charm.

    Just vacuum the reservoir out, fill it up and draw the new fluid to each wheel and clutch checking and adding fluid to the reservoir when changing locations.

    No second person and no fuss.
     
  6. bosshog8

    bosshog8 Formula Junior

    Mar 13, 2011
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    Demetrius
    #6 bosshog8, May 22, 2014
    The channel the fluid resides in and flows through is normally open to the reservoir. When you apply the brakes, a plunger first closes it and then forces the fluid into the brakes. So the Motive just pressurizes the channel without the pedal.
     
  7. f360nh

    f360nh Karting

    Apr 12, 2014
    210
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    Full Name:
    John Q.
    #7 f360nh, May 22, 2014
    Great -- that clarifies it. Thank you. I just ordered some Super Blue brake fluid and will be doing the change in the next 1-2 weeks.

    One more question -- is there fundamentally wrong to drain the entire system and having the lines dry before re-filling? I think I may have a leak around one of the brake lines that go in a union inside the front trunk (close to where the brake pressure switch connects to).

    I would assume that changing that line/union/etc. would be possible only with the system emptied out.
     
  8. f360nh

    f360nh Karting

    Apr 12, 2014
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    Full Name:
    John Q.
    #8 f360nh, May 23, 2014
    Last edited by a moderator: Sep 7, 2017
  9. bosshog8

    bosshog8 Formula Junior

    Mar 13, 2011
    448
    Pinelands NJ
    Full Name:
    Demetrius
    #9 bosshog8, May 23, 2014
    Drained is fine but "dry" is something all together different. Drain it, fix the leak and replace/flush with new fluid.
     

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