General update and master cylinder question

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  • Italian_Tuneup
    Advanced Member
    • Sep 2018
    • 128

    #1

    General update and master cylinder question

    So it's largely been two years of enjoyment with my M60 swapped '85. The car has proven reliable with one quirk. I took it on a 1800 mile rally this September to Idaho and the car did great, although I did get it a little warm running it hard on a segment. The only issue I have had is intermittently having the clutch pedal go soft. The first time it happened I chalked it up to not bleeding it fully. I re-bled it and it was better. One day I noted that it felt a little spongy again but then strangely the next time I drove it it was back to being nice and firm. This happened again later and once again resolved. Now, it has happened a 4th time and did not cure itself, so I tried to bleed it. I pushed out a bunch of air, then clear fluid and the clutch felt good. After 2-3 strokes it got mushy again, but no air comes out. It's running Wilwood MC's... I inspected the MC and there is a slight dampness on the piston shaft but it;s not leaking anything.

    Do these Wilwood MC's fail often? Is it worth rebuilding or just buy a new one if this ends up being the source?
    1985 325e -> M60 swap project
    1983 GTV6
    1974 X1/9
  • It's Soda Not Pop
    E30 Modder
    • Jan 2022
    • 859

    #2


    I did a quick google search for common issues. I found this.

    88' Seta 2.7i Zinno

    https://www.r3vlimited.com/board/for...430-my-88-seta

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    • Panici
      Moderator
      • Dec 2009
      • 2316

      #3
      Originally posted by It's Soda Not Pop
      https://thefactoryfiveforum.com/show...lutch&p=501867
      I did a quick google search for common issues. I found this.
      Oof that's not encouraging feedback for a big company.
      Failures with their own Wilwood pedalbox rule out installation error.

      Hopefully it was just a bad parts run or supplier.
      Much like the guys on that forum, I would get a replacement from Wilwood and then if you have another failure switch to Tilton.

      '87 BMW E30 325is Turbo

      '99 BMW E36 M3 - - - '98 BMW E36 328i

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