Proper clutch diagnosis?

Discussion in '6.9L IH & 7.3L IDI Diesels' started by chillman88, Dec 4, 2018.

  1. jwalterus

    jwalterus Made in America

    Posts:
    2,491
    Likes Received:
    616
    Joined:
    Feb 11, 2010
    Location:
    Minot, ND
  2. Shadetreemechanic

    Shadetreemechanic Full Access Member

    Posts:
    1,484
    Likes Received:
    77
    Joined:
    Sep 16, 2007
    Location:
    Monteagle, TN
    The heim joint is a great mod, but if you get in a pinch and cant keep the pushrod on a small pair of needle nosed vice grips clipped onto the end of the pedal stub will hold everything in place and get you shifting again.
    I have new bushings and vice grips on all three of my IDIs. One has had it now for 5 years. If the shaft is worn on the pedal so that it doesn't hold the factory bushing, the vice grip will fix that as well.
    Ill do the heim joint mod eventually, if not sooner.
     
    The_Josh_Bear and chillman88 like this.
  3. tjsea

    tjsea Full Access Member

    Age:
    30
    Posts:
    463
    Likes Received:
    231
    Joined:
    Jan 8, 2007
    Location:
    Lickdale, PA
    If your new master cyl is cocked off on an angle I'm willing to bet it's for the wrong year. The earlier master cylinders had the bolts straight up and down and the later ones were angled a little. Either way the masters still work fine. This also probably explains the difference in pushrod length.
     
    chillman88 likes this.
  4. chillman88

    chillman88 Supporting Member Supporting Member

    Posts:
    1,779
    Likes Received:
    957
    Joined:
    Feb 22, 2017
    Location:
    Central NY
  5. 79jasper

    79jasper Chickenhawk

    Age:
    26
    Posts:
    15,803
    Likes Received:
    1,173
    Joined:
    Oct 13, 2012
    Location:
    Collinsville, Oklahoma
    Yup. I had a brick master on my obs, sat exactly the same. Tilted towards the engine.
    If tilted towards the brake master, it must be a obs master in a brick truck. Lol

    Sent from my SM-N960U using Tapatalk
     
  6. chillman88

    chillman88 Supporting Member Supporting Member

    Posts:
    1,779
    Likes Received:
    957
    Joined:
    Feb 22, 2017
    Location:
    Central NY
    Exactly, Thanks! I was wondering if that was the case.
     
  7. freebird01

    freebird01 Post Turtle!

    Posts:
    2,892
    Likes Received:
    39
    Joined:
    Oct 31, 2007
    Location:
    Fort Wayne, IN
    the 83-86 and 87-91 clutch master cylinders are different. it has to do with how the mount is rotated.either should work..just a pain to fill the one laid on its side.
     
    tjsea and chillman88 like this.
  8. DrCharles

    DrCharles Full Access Member

    Posts:
    466
    Likes Received:
    212
    Joined:
    Dec 18, 2017
    Location:
    West Plains, MO
    Today I got under my truck and looked... no obvious leaks or stains, the fluid in the clutch master was just a hair below the inside step and I topped it off. The pedal linkage does not have any unusual slack, no deflections or creaks/pops, firewall is not visibly moving.

    But the end of the fork is moving only half an inch (or even a bit less) with the pedal to the floor. And since the inspection cover is missing, I can see the pressure plate is barely twitching. Obviously not disengaging the clutch since it won't go into gear sitting still (and grinds reverse). I suspect it's time to get a prebled master/slave setup and pop it on.

    Meanwhile, does anyone know what the fork travel should be? :dunno

    In my experience most clutches need the outer end of the fork to move closer to 1". If what I'm seeing is normal then the problem may be inside the bellhousing :(
     
    Last edited: Dec 8, 2018 at 4:17 PM
  9. jwsfarrier

    jwsfarrier Full Access Member

    Age:
    49
    Posts:
    77
    Likes Received:
    3
    Joined:
    Sep 21, 2014
    Location:
    Wilsonville,OR
    Hi all! I have been following this post and have similar issues with my clutch. I have been looking at my local auto parts stores and no one can get a set with the master/ slave cylinder in a set . let alone one that is pre- bled. Also looked at summit . Nada. I know the rock auto one will fit but it doesnt seem to be the right year. I guess i can always by them separately but the pre- bled set seemed like the way to go. Any recommendations would be of help. Thanks a bunch
     
  10. chillman88

    chillman88 Supporting Member Supporting Member

    Posts:
    1,779
    Likes Received:
    957
    Joined:
    Feb 22, 2017
    Location:
    Central NY
    As of right now my recommendation is to buy them separately and bleed them. I have second thoughts about mine simply because I'm worrying about the line not fitting right. I also might have to pull this master back off and see if that rear seal slips off. I'm not sure it's sitting flush on the firewall like it should. But I'm a worrier anyway...
     
  11. DrCharles

    DrCharles Full Access Member

    Posts:
    466
    Likes Received:
    212
    Joined:
    Dec 18, 2017
    Location:
    West Plains, MO
  12. 79jasper

    79jasper Chickenhawk

    Age:
    26
    Posts:
    15,803
    Likes Received:
    1,173
    Joined:
    Oct 13, 2012
    Location:
    Collinsville, Oklahoma
    Just get the individual. These really aren't that hard to bleed.


    Sent from my SM-N960U using Tapatalk
     
    jwalterus likes this.
  13. jwsfarrier

    jwsfarrier Full Access Member

    Age:
    49
    Posts:
    77
    Likes Received:
    3
    Joined:
    Sep 21, 2014
    Location:
    Wilsonville,OR
    Thanks for the replies guys. I have a 1989 with the zf-5. Talked to AutoZone and they didn't have the set for that year. No worries, I can just do separately. I am curious if that 93 kit will work on the 89 though.
     
  14. 79jasper

    79jasper Chickenhawk

    Age:
    26
    Posts:
    15,803
    Likes Received:
    1,173
    Joined:
    Oct 13, 2012
    Location:
    Collinsville, Oklahoma
    As already stated, it will be cocked sideways.

    Sent from my SM-N960U using Tapatalk
     

Share This Page