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Technical Need help with clutch issue.

Discussion in 'The Hokey Ass Message Board' started by evintho, Oct 7, 2017.

  1. evintho
    Joined: May 28, 2007
    Posts: 2,380

    evintho
    Member

    2.3L turbo 4 cyl w/T5 from an '88 Turbo Coupe in my '27 roadster. It's a factory hydraulic clutch w/good working slave cyl. When pushing down pedal it takes extreme leg pressure and I can see the clutch fork move about 1/2 way. With trans out the TOB slid smoothly on the pilot shaft. I'm pretty sure the problem is in the master cyl.
    M/C from a '63 Chevy pickup. The right side is marked 'clutch' and left marked 'brake'. When I first got it I swapped the piston, spring and residual valve from the 'clutch' side to the 'brake' side and vice-versa. I thought it kinda odd the M/C was marked that way as the clutch pedal is always on the left. IIRC, I think there was a residual valve in both bores.

    Anyhow, I bench bled the M/C, installed it and I have no clutch. I pulled the hydraulilc line off the M/C, pumped the pedal and very little fluid comes squirting out of the M/C. Would it have something to do with the residual valve in the clutch bore? Something else?
    Also, I expected some sort of divider inside the M/C to separate the clutch side from the brake side but it's pretty much all one bowl. Any help is greatly appreciated, I'm kinda lost here!

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  2. If you're running the Ford slave cylinder, you need to change it to the one from the Chevy truck. I had the same problem with a car I bought years ago. It had a Datsun truck motor with the Datsun slave cylinder. The clutch was like an on/off switch. I changed the slave cylinder to the one from the Chevy truck and the clutch worked great.
     
  3. evintho
    Joined: May 28, 2007
    Posts: 2,380

    evintho
    Member

    It barely spurts out any fluid from the M/C port. I think the slave isn't getting enough fluid to operate it.
     
  4. squirrel
    Joined: Sep 23, 2004
    Posts: 56,088

    squirrel
    Member

    I think the location of the clutch and brake sides of the MC has to do with how the pedal linkage in the original truck is set up.

    I wonder if the ports connecting the reservoir to the cylinders, is different on the two sides?
     

  5. Bad clutch master? It should put out a good squirt. Did you bleed it?
     
  6. seb fontana
    Joined: Sep 1, 2005
    Posts: 8,495

    seb fontana
    Member
    from ct

    Most of those masters had at least a 1-1/8 bore, some had 1-1/4 on one side..More than enough volume so I would lean more towards a falty MC..
     
  7. evintho
    Joined: May 28, 2007
    Posts: 2,380

    evintho
    Member

    M/C is brand new and yes I bench bled it. IIRC when I swapped pistons, springs and RVs both bores were the same size.
     

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