1. Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;)

1G %#$^ Clutch - No Pressure

Posted by tsiawd90, Oct 2, 2019

Please Support Southbay Fuel Injectors
Please Support ExtremePSI
  1. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    I can not keep pressure in my clutch. I have a brand new OEM Master cylinder, Brand New OEM slave cylinder, Brand New ACT 2600 Clutch, Brand New Pivot Ball, Brand New Clutch Fork and brand new stainless clutch line.

    I have bled and bled and bled both the slave and mater cylinder. I had my clutch assembly welded and checked.

    I am thinking about ordering a new slave and master.
     
  2. ThunderChild

    ThunderChild Supporting VIP

    2,541
    712
    Joined Jan 5, 2012
    Rathdrum, Idaho
    Did you bench bleed the master? Did you try pushing the slave back into the housing to purge all the air out?

    You either have an air leak, it's not bled properly, it's not adjusted properly, or bad components. If they're new and you don't have any leaks, them I'm betting on adjustment or needs bled properly.
     

    Street Build 210  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    291  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 841  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 1K  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  3. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    I followed every recommendation for bleeding the system. I don't think I can fix it by bleeding.

    Either I have something leaking but I don't see any leaking fluid or something needs to be adjusted. I just don't know where to start.
     
  4. Vegas smith

    Vegas smith Proven Member

    2,638
    1,221
    Joined Dec 2, 2002
    Houston, Texas
    Have you adjusted the master cylinder nut for maximum travel?
     

    Street Build 3K  10

    1993 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  5. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    4,246
    1,771
    Joined Nov 14, 2013
    Independence, Kansas
    Boy isn't that always fun.......???
     

    Street Build 3K  27

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM

    258  13

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    364  17

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 518  4

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
    Loading...
  6. JAW91

    JAW91 Proven Member

    99
    4
    Joined Dec 16, 2008
    Orlando, Florida
    Have you properly bled the system? I know when I first started bleeding cars I was told taught to pump the clutch when bleeding it to “build pressure”, which I found out later makes air bubbles in the system. Your supposed to push the clutch down, open the valve, let the air come out, close the valve, lift the pedal. Repeat until only fluid comes out. While of course making sure the reservoir never goes empty.
     
    ThunderChild likes this.
  7. Lucky13

    Lucky13 Supporting Member

    97
    7
    Joined Nov 20, 2002
    Palm Beach Gard, Florida
    I found switching to a speed bleeder on the slave made bleeding clutches a 10 min one man job.
     
  8. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    I did, its backed out all the way.
     
  9. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    I'll try it out if you think it will fix it. Where can I get one?
     
  10. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    Also when I bled the slave, it was straight fluid shooting out. No bubbles or sputters.
     
  11. Lucky13

    Lucky13 Supporting Member

    97
    7
    Joined Nov 20, 2002
    Palm Beach Gard, Florida
    This is where I got mine back in the day.http://www.speedbleeder.com/size.htm They have a chart so you can get the correct size. You might be able to find them now a days at pepboys , autozone, etc.
     
  12. Vegas smith

    Vegas smith Proven Member

    2,638
    1,221
    Joined Dec 2, 2002
    Houston, Texas
    The speed bleeder shouldn't be causing this use but it defiantly helps speed up the process so much that I'll never do brakes or a clutch without them.
     

    Street Build 3K  10

    1993 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  13. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    1990TSIAWDTALON likes this.
  14. twicks69

    twicks69 Supporting Vendor

    3,230
    644
    Joined Mar 12, 2004
    Milwaukee, Wisconsin
    Have you disassembled the clutch master cylinder and looked directly at the piston seals? It sounds like a damaged bore or a defective inner piston seal on the master.
     

    Drag Race Build 7K  12  76

    1999 Mitsubishi Eclipse GSX
    9.499 @ 155.00 · 2G DSM
    Loading...
  15. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    I'll order a new master cylinder and try swapping it out.
     
  16. twicks69

    twicks69 Supporting Vendor

    3,230
    644
    Joined Mar 12, 2004
    Milwaukee, Wisconsin
    How about simply taking it out and disassembling it? Really simple.
     

    Drag Race Build 7K  12  76

    1999 Mitsubishi Eclipse GSX
    9.499 @ 155.00 · 2G DSM
    Loading...
    Mello likes this.
  17. tsiawd90

    tsiawd90 Supporting Member

    60
    10
    Joined Nov 16, 2017
    Houston, Texas
    I'll try that but am I going to be able to easily spot the problem?

    Also can I just use the same vacuum pump I use for brakes to bleed the clutch instead of pumping the pedal?
     
  18. twicks69

    twicks69 Supporting Vendor

    3,230
    644
    Joined Mar 12, 2004
    Milwaukee, Wisconsin
    Opening up the master cylinder is as easy as removing the retaining circlip, then removing the piston assembly and looking at both the inner and outer piston seals. I am suspecting a damaged inner piston seal, or damage to the cylinder bore that is bleeding off pressure.

    As for the vacuum pump, you can use it, but I typically had better luck just doing it by hand with pumping pedal manually several times slowly, then holding down the pedal and then opening up the bleeder on the slave cylinder (with a piece of silicone tubing on the bleeder nipple going into a fluid container -- bottle with a hole in the cap for example), and doing the process several times, then adjusting inward with the master cylinder adjustment rod as needed.
     

    Drag Race Build 7K  12  76

    1999 Mitsubishi Eclipse GSX
    9.499 @ 155.00 · 2G DSM
    Loading...
    1990TSIAWDTALON likes this.

Share This Page

Support Vendors who Support the DSM Community
Archer Fabrication ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications OHM Racing RockAuto SouthBay Fuel Injectors STM Tuned Track Decals Track Sculptures VR Speed Factory WheelWell.com