exhaust studd

Discussion in 'The Garage' started by Storm Shadow, Jul 6, 2013.

  1. Storm Shadow

    Storm Shadow Thread Ninja

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    ok, changing the extractors, the studd has come out from the engine block, it wont go back in, and i cant get the bolt off the stud either...

    have i really stuffed things up?
    #1
  2. mcma111

    mcma111 Long timer

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    Tap the hole in the block and get a new stud and nut.
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  3. Storm Shadow

    Storm Shadow Thread Ninja

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    problem number two, its a vfr, its a v4, its the rear where u have trouble to even put a nut on a bolt in there. no way im able to get any helicoil into it
    #3
  4. mcma111

    mcma111 Long timer

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    I said TAP as in run a tap in the hole to clean up the threads so a new stud can be inserted. If the threads are ruined then the head will have to come off to heli coil it.
    #4
  5. Storm Shadow

    Storm Shadow Thread Ninja

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    thats going to cost me
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  6. hpsVFR

    hpsVFR Hoosier Daddy

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    There's no way of knowing whether or not you've stuffed anything up without a detailed inspection. Unfortunately, as you write later, visual inspection is exceedingly difficult in this location.

    Inspecting the exhaust stud might provide some clues about the state of the threads in the head, and the cause of your difficulties. If you can post up some photos of the stud, perhaps we can see something that can guide your efforts.
    #6
  7. Storm Shadow

    Storm Shadow Thread Ninja

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    exhaust stud looks perfectly fine,

    im going to put it in a vice, and unlock the bolt on it, then try and clean up the thred in the block, compressed air to clean anything out of it, then try to put it back in using high temp lock tight.

    then hopefully thats all thats needed.

    if i have damaged the threads on the block, will first attempt a tap, which will probably require, removing sub frame, suspension, possibly swing arm to get into it. :puke1
    #7
  8. KeithinSC

    KeithinSC Long timer

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    It may not be that bad. If you can get the stud in and out without removing all the parts, you should be able to get a tap in place.
    Remember, you are not cutting brand new threads, just cleaning up existing threads. You should be able to turn the tap in with an open end wrench, no need for the full size tap handle. Just take care to keep the tap lined up square.
    #8
  9. AustinJake

    AustinJake TE450-KLE-FXDWG

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    Good advice, +1
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  10. Storm Shadow

    Storm Shadow Thread Ninja

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    do you need heat or something when putting the studs in?

    i took the nut off the stud today, thats out, as it was seized on, needed a lot of force in a vice. and the nut wont go back on, the outside even appears slightly bent to me.

    i have new studs and bolts on the way though..
    #10
  11. KeithinSC

    KeithinSC Long timer

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    What probably happened was the nut galled or rusted onto the stud. The nut had a stronger grip on the stud than the head had on the stud. So when you turned it, you walked the stud out of the head.

    Nothing fancy about installing the new stud. Put two nuts on it, jam them tight against each other, then use your wrench on those to tighten the stud into the head. Maybe use some hi-temp loctite (??) Once the stud is 'home' use two wenches to separate the two jammed nuts from each other and remove them. Install header, go ride:clap Same method is used to remove the studs also.

    As far as the stub being bent, now that you have it our, try rolling it on a nice flat surface to see if it is bent or not. What happens a lot of times is some FORCE is needed to get a poor fitting header over the studs. A bit of persuasion is needed and a stud is bent in order to get the header flange over it.
    #11
  12. Storm Shadow

    Storm Shadow Thread Ninja

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    well, this whole issue arrose from my poor fittign after market springy stainless steel headesr, trying to lever them into place.

    eventually teh gaskets failed, on them, and i was in the process of replacing it. but im going to put the origional exhaust back on now, with cat and all.. just leave it at that, no more mods to make it go fast
    #12
  13. Bark

    Bark Panic Dancer

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    Not trying to highjack the thread but on autos I always use anti-seize in case I have to pull it apart later and have used it on some bikes. Is that a bad idea on bikes because of the vibrations?
    #13
  14. Benesesso

    Benesesso Long timer

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    Sell it and buy a Hayabusa. :1drink
    #14
  15. Storm Shadow

    Storm Shadow Thread Ninja

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    its tempting but since i only just brought it as a new bike a little more than a year ago, i think id loose too much money...
    #15
  16. Storm Shadow

    Storm Shadow Thread Ninja

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    well the embarrassment of putting the bike on a trailer and taking it an hour away to a bike mechanic, to fix what you did :-(

    i dont think i will get out of this for under 1000 bucks
    #16
  17. sieg

    sieg Long timer

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    The last place I'd use Loctite is on an exhaust stud! Anti-seize yes.
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  18. Benesesso

    Benesesso Long timer

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    Take it to a good machine shop instead. They're used to performing small miracles to save ass. They'll have a tap and get you fixed right up.

    Where are you?
    #18
  19. Benesesso

    Benesesso Long timer

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    +1, of course.
    #19
  20. Storm Shadow

    Storm Shadow Thread Ninja

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    #20