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360 Brake Flush Problem

Discussion in 'Technical Q&A' started by spider348, Jan 3, 2021.

  1. spider348

    spider348 Formula 3
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    Nov 3, 2003
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    MA
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    John
    Having an issue with the brake flush on my 360.
    2001 360 F1 spider.
    Motive Power Bleeder. Used multiple times on my prior F355, 348 etc with no issues. Simple and easy to set-up and use.
    My 360 appears to be a different story!
    Attach Power bleeder. Check pressure. No drift, holds.
    Brake fluid in power Bleeder. Pressure to 15psi.
    Open bleed screw. Little or no fluid.
    Repeated attempts at different wheels. Same result.
    Shop flushed 2 years ago, fluid looks fine. Everything clean.
    I assume pilot error. Help appreciated!
     
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  3. Island Guy

    Island Guy Rookie

    Feb 20, 2020
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    Island Guy
    Try the inner bleeder first. It is very common for the external cross over line to be obstructed.
     
  4. Ferrari Tech

    Ferrari Tech Formula Junior

    Mar 5, 2010
    639
    Georgia
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    Wade Williams
    It is possible that you need new rubber lines. Also as stated above, the crossover tubes clog frequently. I recommend a thorough cleaning of the calipers. Also, check the reservoir bottom and make sure you don't have a gummy build up. That is common as well and a power bleeder will just force it into the ABS unit and that is not good. I have repaired many 360s with this issue.
     
  5. spider348

    spider348 Formula 3
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    Nov 3, 2003
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    Thank you MerlinTech! I researched this on the forum and found a post from you detailing "Gel" like brake fluid in 360s about 10 years ago.
    Pro flushed the system 3 years ago, not 2(My Bad). Used Shell DOT 4 Brake Fluid.
    I bled the Master Cylinder. Fluid now clear.
    Will replace lines and flush/clean calipers.
     
  6. EastMemphis

    EastMemphis Formula Junior
    Silver Subscribed Owner

    May 25, 2019
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    Memphis, TN
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    John
    Before you go crazy replacing lines, I suggest reversing the procedure. Open one bleeder at the closest wheel to the reservoir and force the fluid backwards. Since all four of your wheels are not bleeding, the clog has to be close to the reservoir. You may be able to force the clog back into the tank and free everything up. I'd try that before replacing all the lines and finding the problem still presents itself.
     
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  8. fatbillybob

    fatbillybob F1 World Champ
    Consultant Owner

    Aug 10, 2002
    19,997
    socal
    I know people love the motive's but I have always got a better pedal doing it 2 man. If you have no fluid flow 2 man then you have a problem. Also some cars bleed better if engine on because you get more pressure. You have to be more careful. Rubber lines do fail and things can gum up but it is rare, vs. the number of cars with no problems, on even a margianlly serviced brake system.
     
  9. afwrench

    afwrench Formula Junior

    Nov 24, 2004
    551
    NY
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    Mike
    Do the brakes work when you hit the pedal? Do they release when you are off the pedal? Same on all 4 wheels? Mike
     
  10. spider348

    spider348 Formula 3
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    Nov 3, 2003
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    Afwrench, yes brakes worked fine. No issues. Hard pedal. Pad wear consistent. Same issue all 4 corners.
    Researched online. Read many makes with similar issue. Porsche, BMW, Corvette, Ducati, HD etc. all attributed problem to fluid contamination. No idea if mine is the same.
    Fluid removed is darker, appears marginally higher in viscosity.
    Fatbillybob, plan to try 2 man method next. Bled many cars this way over the years!
    Thanks to all for replies.
     
  11. garybobileff

    garybobileff Formula Junior
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    Feb 5, 2004
    741
    San Diego CA
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    Gary
    This is becoming a common problem in 360's as they get older, and we have experienced it often. The problem that we've found is that the fluid reservoir falls apart internally, and little plastic white colored pieces migrate down to the caliper crossover pipes and clog them up. Replace the reservoir, remove the cross over pipes and clean them, and the problem should go away and reoccur twenty years from now!
    Gary Bobileff
     
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  13. spider348

    spider348 Formula 3
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    Nov 3, 2003
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    Hello Gary, thank you. Will follow your procedure since based on real world experience. Not much more valuable when determining root cause of an odd problem!
    Dealt with you years ago. Helped me with a Bobileff customer's '86 Euro Black TR. Put me in touch with the owner(Qualcom exec if I recall correctly). Did the PPI. After sale, I had you do the complete major due, new tires etc. Shipping to MA. Your help was invaluable. Made the buying experience very positive!
     

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