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Clutch Trouble

Discussion in '348/355' started by loumarch, May 17, 2011.

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  1. loumarch

    loumarch Rookie

    Oct 17, 2008
    1
    #1 loumarch, May 17, 2011
    I have done an exhaustive job bleeding the clutch in my 348.
    The fluid was ink black at first, then turned nicely clear by the end of the second bottle of DOT 3/4 fluid !
    The original problem was with the clutch pedal depressed, the clutch would slowly engage even though there was still "normal" pedal pressure pushing back on my foot.
    Recently there have been occasions when I let the clutch up, it would not have pressure for about 1/4 of the travel for 1 or 2 seconds.
    Has anyone heard of or experienced this problem ... ANY help would be SO greatly appreciated !!!
    I can easily handle the repairs if I know where the problem is !!
     
  2. yelcab

    yelcab F1 World Champ
    Consultant

    Nov 29, 2001
    13,667
    San Carlos, CA
    Full Name:
    Mitchell Le
    #2 yelcab, May 17, 2011
    may be you should change the slave cylinder.
     
  3. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,232
    Mount Isa, Australia
    Full Name:
    Pap
    #3 PAP 348, May 17, 2011
    Do you think the throwout bearing may be sticking? :):)

    Could be, perhaps it could an issue with the master cyl sticking. I have seen that before but have never heard of the t/o bearing causing this issue. :):)

    Also, if the fluid was THAT black, there could be sludge/gunk in the brake fluid resivior which is getting into the system causing this issue. :):)

    Ive seen that before also. Usually pull the master cyl out and clean all the crap out. Refit and re-bleed the system usually fixes it. :):)

    Have you seen any improvement since bleeding the old fluid out?? Or you still have the issue? :):)
     
  4. Dave Monk

    Dave Monk Karting

    Apr 23, 2010
    213
    SW Virginia
    Full Name:
    David Monk
    #4 Dave Monk, May 17, 2011
    Could be, perhaps it could an issue with the master cyl sticking. I have seen that before but have never heard of the t/o bearing causing this issue. :):)

    I agree with Pap on the master cylinder, if the clutch was slowly engaging while depressed it sounds like the fluid is bypassing the plunger. It is pretty easy to remove the master cylinder, two bolts on the firewall and a bolt on the pedal (which you have to stand on your head to remove). When you get it out there is a circlip that holds the whole thing together. Disassemble, clean and see if anything is torn or gouged.
     
  5. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,620
    The Brickyard
    Full Name:
    The Bad Guy
    #5 ernie, May 18, 2011
    Last edited: May 18, 2011
    I agree with what others have said, it sounds like a problem with the clutch master cylinder. Pull it out and rebuild it. Plugzit bought a rebuild kit from GT Car Parts for $30. Here is his thread with some pics. http://ferrarichat.com/forum/showthread.php?t=310129

    Oh yeah, and welcome to Ferrarichat, and the 348 Brotherhood.
     

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