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U-Bolts and Engine Mounting/ Specs

Discussion in 'Flat Fender Tech' started by sammy, Sep 3, 2007.

Page 2 of 2
  1. Sep 5, 2007
    sammy

    sammy Coca-Cola?

    Albuquerque, NM
    Joined:
    Jul 1, 2007
    Messages:
    1,577
    If I may ask, how /where did it break in the bolt? Just wondering. Pretty much sold on "Buy new ones Sammy!!" lol, just wondering for some reference, maybe if I need to spat out info on it, it's nice to know ;)
     
    sammy, Sep 5, 2007
    #21
  2. Sep 6, 2007
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
    Messages:
    5,469
    It broke right at the spring plate. The axle didn't come totally free, just loose enough to slide along the springs and change the direction it was pointing at random times. Most Ubolt breakage I have seen have been at the point where it shears with the spring plate. U bolt skid plates help some with this as it keeps the impacts down at the critical point of the nut and bolt.

    Once I did see one pop at the upper end of the U - I believe that one was due to hard twisting of the drive train.
     
    Warloch, Sep 6, 2007
    #22
  3. Sep 6, 2007
    CJ-X

    CJ-X Member

    Ohio
    Joined:
    Aug 6, 2006
    Messages:
    816
    Two things.
    1) I re-use decent u-bolts. They can be re-torqued. Think about it. You have to re-torque them after you drive them for a while anyway. You can't just keep putting new ones on!
    2) When mounting an L-head on an engine stand, space it out far enough so that you can rotate the crankshaft with the bolts still in it.
     
    CJ-X, Sep 6, 2007
    #23
  4. Sep 6, 2007
    sammy

    sammy Coca-Cola?

    Albuquerque, NM
    Joined:
    Jul 1, 2007
    Messages:
    1,577
    On my way to get new ones now....
    CJ-X, what hardware do I use to mount, what holes?
     
    sammy, Sep 6, 2007
    #24
  5. Sep 6, 2007
    Vanguard

    Vanguard Take Off! Staff Member

    Vista, CA USA
    Joined:
    Aug 30, 2006
    Messages:
    2,259
    You should always use new U-bolts. It's what the manufacturer recommends.

    http://www.eatonsprings.com/ubolttorques.htm

    If you need part numbers do a search on "Dorman" and U-bolt. You'll find the appropriate part numbers for a CJ-5 and these should be the same for a flatty. I got mine from the local Carquest.

    Finally, watch your post content. I edited your last post because it's not consistent with the forum rules and agreement.
     
    Vanguard, Sep 6, 2007
    #25
  6. Sep 6, 2007
    sammy

    sammy Coca-Cola?

    Albuquerque, NM
    Joined:
    Jul 1, 2007
    Messages:
    1,577
    Like my post had said, got new ones, I'll be going with those go with that, I even talked to the man and he told be what torque, so I'm set. No need to go to that and order new ones...Again... Since I got mine...Today.
    -Sammy
     
    Last edited by a moderator: Sep 6, 2007
    sammy, Sep 6, 2007
    #26
  7. Sep 7, 2007
    CJ-X

    CJ-X Member

    Ohio
    Joined:
    Aug 6, 2006
    Messages:
    816
    Typically you just install long enough bolts that will reach through the holes on your stand and through the holes on your engine that the bellhousing bolts to. The bolts do not have to fit perfect. On my stand, I need spacers inbetween so I can rotate the crankshaft if it has bolts in it.
     
    CJ-X, Sep 7, 2007
    #27
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