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what will cause this???????

Discussion in 'The Hokey Ass Message Board' started by slamdpup, Jan 15, 2007.

  1. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    check this out ..i have a damn near a full bottle of gas ..never had this happen before?..anyone have any ideas????????its only doing it in certian spots..not everywhere...its 16 gauge patch metal
     

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  2. budd
    Joined: Oct 31, 2006
    Posts: 3,478

    budd
    Member

    could be the little bit of oxadization still on the metal, i`d try giving it a better grind job, say about 1/4" on both sides of your seam.
     
  3. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    i dont think its that...its clean ..it just looks that way in the pic..some spots are darker because of the shrinking disk marks
     
  4. 392_hemi
    Joined: Jun 16, 2004
    Posts: 1,737

    392_hemi
    Member

    Could be unclean surface, no gas (kink in hose, etc.) or bad gas.
     

  5. Royalshifter
    Joined: May 29, 2005
    Posts: 15,509

    Royalshifter
    Moderator
    from California

    Do you have any air moving the gas? As in a fan.
     
  6. metalman
    Joined: Dec 30, 2006
    Posts: 3,284

    metalman
    Member

    I had a pinhole in the line from tank to welder once, drove me crazy till I found it. I could hear the gas at the tip but was losing enough pressure my welds looked like crap.
     
  7. MercMan1951
    Joined: Feb 24, 2003
    Posts: 2,654

    MercMan1951
    Member

    You sure you got the + and - leads on the handle wired to the box right?
     
  8. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    no no moving air
     
  9. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    yea i have been welding all day..with no problems at all..same welder same gas..same wire..like i said it only does it in certian spots around the gas door...its clean ...the tacks on the other side came out good..its mainly that 1 side..
     
  10. budd
    Joined: Oct 31, 2006
    Posts: 3,478

    budd
    Member

    try another piece of metal as a test, grind it down to bare metal and do a few tacks right in the middle away from any seams.
     
  11. xlr8
    Joined: Jun 26, 2006
    Posts: 698

    xlr8
    Member
    from Idaho

    Gas door? If the area has been contaminated for years with leaded gas the lead will imbed itself in the iron. Might be a possibility.
     
  12. Gumpa
    Joined: Jan 19, 2006
    Posts: 601

    Gumpa
    Member

    I agree with xlr8 on the gasolline issue. I chased this same problem on the bed of an old pickup used by a maintenence crew for logging equiptment until I just gave up and got another bed.
     
  13. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    ok i have been welding on other panels with no problems at all..then i get back on the gas door to finish the welding and again this shit happens again...im sure now its the lead that you were talking about...how do i clean it off so i can get a good clean weld there??????????????..any ideas..anybody else ever have this happen to them???????
     
  14. Soviet
    Joined: Sep 4, 2005
    Posts: 729

    Soviet
    Member

    Just like xlr8 stated, it's possible that the area directly around the gas door is heavily contaminated with lead. It might be easiest to cut out an area around the door opening that has not been contaminated - it will me more work now, but you won't have to keep messing with contaminated welds. Just a thought.
     
  15. williebill
    Joined: Mar 1, 2004
    Posts: 2,802

    williebill
    Member

    sounds like the lead is causing this,but I had a similar problem the other night while welding plain old mild steel...thought WTF?? then realized when I popped the nozzle off to clean the slag out of it,I didn't push it all the way back on,so I'm guessing it was drawing air through the gap..welds bubbled up like hell,full of air pockets,voids,shit...30 years of welding,and this is the first time i've ever done that..sometimes it is the simple stuff
     
  16. 49ratfink
    Joined: Feb 8, 2004
    Posts: 18,097

    49ratfink
    Member
    from California

    when in doubt, crank up the amps....

    it has been my experience when the metal is dirty a little boner appears on the weld. looks to me like you have an indent. I would rule out dirty metal.

    how's your nozzle? full of junk? clean it out. tip screwed on tight? nozzle screwed on tight?
     
  17. cheaterslick
    Joined: Nov 2, 2003
    Posts: 808

    cheaterslick
    Member

    Well if the welds are fine on another piece of metal, it's obviously a contamination issue on the car. Welds with no gas don't look like that, they are usually more crusty and full of tiny air bubbles. Those look like melted lead! You'll have to find a way to find out where the contamination is, then remove it. Maybe a light 120 grit DA, wipe clean, change disk, repeat. Might clean it up enough to get a good weld.
     
  18. xlr8
    Joined: Jun 26, 2006
    Posts: 698

    xlr8
    Member
    from Idaho

    I'm not sure you can clean it. From what I understand the lead and steel become fused together. It might be possible to sweat the lead out with a torch, that's about all I've got for ideas.
     
  19. MercMan1951
    Joined: Feb 24, 2003
    Posts: 2,654

    MercMan1951
    Member

    I would think about a respirator at this point, I hope you're not breathing that shit....
     
  20. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    yes all clean
     
  21. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    i have corrected the problem...not the traditional way ..but its fixed...i grinded all the welds down and cleaned it again front side and back side and panel glued it(duramix) front and back..i didnt really want to do it this way but that stuff is very strong so i trust it..used it alot in the past on other vehicles..so i know it works..thats also how i was gonna peak my hood anyways..NO HEAT envolvled...but i am pretty damn sure it was from the lead gas...i hit the welder on some lead that i havent dug out yet on the car and the puddles looked the same..so im convinced..so problem solved..moving on to the next mod...thanks all for the replys
     
  22. Danimal
    Joined: Apr 23, 2006
    Posts: 4,131

    Danimal
    Member

    Thanks for sharing the problem. Now I know what to look for. I never would have thought about the lead in the gas.
     
  23. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    yea i didnt have a clue what the hell was goin wrong...its on there now tho...i think it might even be stronger than weld now...i put a thick coat of duramix around the seam inside and out and put a head lamp on it for 20 hours...filed down the excess tonight and put the heat lamp back on it for couple hours...i dont think there will be a problem..i will be peaking my hood with that stuff as well..dont have to worry about warping at all....thanks for all the replys and help
     
  24. tragic59
    Joined: Sep 16, 2002
    Posts: 766

    tragic59
    Member


    Slamdpup, I wanna see a tech post on peaking your hood with that duramix stuff.

    Can you swing one? With pics and step by step?
     
  25. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    im not ready at this point to do the hood...its abit to cold outside to use that duramix on a large area..but when i do it i will take pics and post them..the temp. needs to be at least 65 to 85 degrees..
     
  26. butch27
    Joined: Dec 10, 2004
    Posts: 2,847

    butch27
    Member

    Hell: all of my welds end up looking like that.(Flux core 110 welder only).
     
  27. slamdpup
    Joined: Apr 27, 2005
    Posts: 1,094

    slamdpup
    Member

    i tried that once...WILL NEVER FUCKIN DO IT AGAIN...lol
     

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