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Weld diff plug with fluid in or out?

Discussion in '40- & 55-Series Tech' started by cruiserhead, Aug 14, 2006.

  1. cruiserhead

    cruiserhead

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    A friend of mine wants me to weld up his drain plugs.Not because they are leaking,but they lossen up when wheelin`(dragged on rocks).He`s running synthetic in the housings.I`ll be tig weldn` them.Yes I`ll clean any oil off.Just wondering if anyone see a problem with doing it with the oil in.Thanks in advance.
     
  2. HawkDriver

    HawkDriver

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    One problem really... Are you serious, does he not want to ever change the oil again?

    Why don't you just add some protection to the plugs, like found on most LC axles, and get new seal rings and maybe even add some sealant. You know, like add a ring around the plug. Then you could remove the oil, weld it, then refill it.
     
  3. Nomis

    Nomis

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    Before you weld it - be sure and back out one of the upper studs and replace it with a bolt, so he can fill it in the future. Or since you have your TIG handy - just weld one of the bolts on to the stud for him and he'll be all set. Although, I'm curious what happened to the original diff plug protective ring as well? If it has been ground down - just weld another one on - like the Hawkdriver said.

    Oh, and I don't see a problem doing it with the oil in it - it should act like a heat sink.
     
    Last edited: Aug 15, 2006
  4. cruiserhead

    cruiserhead

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    Yup,original ring ground off by rocks.And that was the answer I was looking for,"should be fine".I appreciate your feedback as usual.
     
  5. camcruiser13

    camcruiser13

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    put some thread lock on there or somethin, why weld it. im with hawk on this one
     
  6. Nagalfar

    Nagalfar

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    There might be one problem, you are welding steel to Alum. the cooling rates on these is a lot different, and the expansion/contraction rates might actually tear away the Alum from the steel plug after "X" times of cooling and heating up.. at the very least I am sure over time it would fatigue the area around the plug making it weak..
     
  7. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

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    :confused:


    Where is the aluminum on an axle housing or drain plug?


    Further,

    Cooling rates do not make any difference; you cannot weld aluminum to steel.
     
  8. Nagalfar

    Nagalfar

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    Poser your right about the housings I miss read the thread.. but, Aluminum can be welded to steel.. I think it was Honda or Mazda that developed how to do it a while back...
     
  9. wantatlc

    wantatlc

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    so wait, the high heat generated by welding something that is a closed environment will not cause a speedy or instant deterioration of the liquid within that enclosure more so than what it was designed for? I woud think that heat would cause some kind of reaction to the oil and make it seperate or brake down or curdle in some way?? or heat up in such a way it gets so hot it bubbles and creates pressure in that enclosed enviornment??
     
  10. 2badfjs

    2badfjs

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    are you looking to weld it up completly or just tack it so it doesnt back out?

    either way, make sure you disconnect your battery so you dont fry it.

    ask me twice how i figured that out :doh:
     
  11. pygpen

    pygpen

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    I've welded the drains on all of my rigs for just that reason; they fall out on the trail. Don't worry about drining the oil to weld, there is not enough heat being generated to have any effect on a gallon of gear oil. As for driaining the diff, I replace the bottom stud with a longer stud and put two nuts on it so the stud backs out. Shure it takes a little longer to drian, but it beats draining it fast across the slabs of the rubicon or some other trail.
    just my opinion, yours may be different.
    PMK
     
  12. pbgbottle

    pbgbottle Forum Lifer

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  13. 2badfjs

    2badfjs

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  14. Mace

    Mace rock scientist.. Staff Member s-Moderator

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    Just weld the bastage. The oil dissapates the heat fast enough that you will not burn it.
     
  15. WES1977

    WES1977

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    I would weld with oil in, and then change the oil afterwards to be safe.
     
  16. kdink79

    kdink79

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    Paragon eats drain plugs


    lost mine twice at Paragon, try the ones that have the allen head.
    They do not stick out as far.

    www.marlincrawler.com/images/plug&socket_250.jpg
     
  17. dacicci

    dacicci

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    I DRILLED BOTH OF MINE OUT AND WELDED IN A PLATE SMOOTH AS SILK NO PLUGS FALLING OUT OR ANYTHING TO GET HUNG UP UN:banana:
     
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