welding in floor pans... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Blizz · 11-05-2006, 02:08 PM

with a mig....gas or gasless?

71swb4x4 · 11-05-2006, 02:09 PM

I have always thought MIG/gas was the easiest to work with.

*72CSTC5* · 11-05-2006, 02:35 PM

mig with gas, the easiest by far.

krue · 11-05-2006, 02:37 PM

Cleaner welds by far.

vtblazer · 11-05-2006, 05:07 PM

Yep, all the above.

71swb4x4 · 11-05-2006, 07:49 PM

I assume you are welding inside. If you are outside and there is a breeze then gasless is the way to go.

Blizz · 11-05-2006, 08:19 PM

i was sold on gas until the last post. so why gas or why not gas? i don't have any tanks right now so i'd have to buy one and the gas. i can weld inside or outside.

71swb4x4 · 11-05-2006, 10:18 PM

If it's windy the shielding gas can blow away and then you will have a terrible time welding. By far the best scenario is inside with gas. If you have to weld outside in wind I would use gasless. I welded with gasless first, and once I picked up the gas it was amazing how easy it was to lay a good bead.

**raggedjim** · 11-06-2006, 10:07 AM

If you're like me, when you bought your welder you got some free flux-core. I used that to put in my floor pans. It was free (kinda) and the welds would never be seen.

I bought .023 esab ezgrind and a bottle for the exterior body work, but I figured why use the $$$tuff on things that wouldn't be seen.

The gas and thinner wire is easier but you can do it with the flux-core.

jmho, Rg

WORNBRAKES · 11-07-2006, 11:33 PM

You get a lot of spatter with flux and it is a pain to clean up. I would use gas and do short lines so the metal dont overheat or warp.

DURRTY · 05-22-2007, 04:32 AM

When welding MIG (with gas and hard wire) you do have to be careful of wind and also the metal needs to be clean. Any rust, old paint, durt ETC will cause the weld to have porosity and incomplete fusion. Use a wire wheel on your grinder and clean it as best as you can. If there is rust that goes deep and wont clean off with the wire wheel, MIG wont do it, yes it might stick it together but you cant get a good weld.
The flux core wire(gas less) rules when it comes to durrty metal. You should still clean it but it wil burn through the paint and rust pretty well.

For the spatter there is some help out there. There are products called anti-spatter that you spray on before you weld. It makes the clean up much easier.

MIG looks good but looks don't mean that its a good weld.
If you can have both types of wire around (and some gas) you cant go wrong.

BLUE THUNDER · 05-24-2007, 12:27 AM

i'm ready to help out blizz. let me know when and we'll have a work day.

11-05-2006, 02:08 PM	#1
Blizz Registered User Join Date: May 2006 Location: San Antonio, Texas Posts: 372	welding in floor pans... with a mig....gas or gasless? __________________ '72 K5 CST Blazer 4x4 in perpetual progress '96 2dr Tahoe 4x4 daily driver, Black Bear Performance tune, 285-75-16 Nitto Grapplers, Magnaflow muffler, K&N Air filter, Bilstein Shocks.........E-fan, DT Tri Y or Pacesetter LTs coming soon

11-05-2006, 02:09 PM	#2
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: welding in floor pans... I have always thought MIG/gas was the easiest to work with. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

11-05-2006, 02:35 PM	#3
72CSTC5 Account Suspended Join Date: Nov 2004 Location: Deer Park, Tx. Posts: 2,522	Re: welding in floor pans... mig with gas, the easiest by far.

11-05-2006, 02:37 PM	#4
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Re: welding in floor pans... Cleaner welds by far. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

11-05-2006, 05:07 PM	#5
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: welding in floor pans... Yep, all the above. Last edited by vtblazer; 11-05-2006 at 05:08 PM.

11-05-2006, 07:49 PM	#6
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: welding in floor pans... I assume you are welding inside. If you are outside and there is a breeze then gasless is the way to go. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

11-05-2006, 08:19 PM	#7
Blizz Registered User Join Date: May 2006 Location: San Antonio, Texas Posts: 372	Re: welding in floor pans... i was sold on gas until the last post. so why gas or why not gas? i don't have any tanks right now so i'd have to buy one and the gas. i can weld inside or outside. __________________ '72 K5 CST Blazer 4x4 in perpetual progress '96 2dr Tahoe 4x4 daily driver, Black Bear Performance tune, 285-75-16 Nitto Grapplers, Magnaflow muffler, K&N Air filter, Bilstein Shocks.........E-fan, DT Tri Y or Pacesetter LTs coming soon

11-05-2006, 10:18 PM	#8
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: welding in floor pans... If it's windy the shielding gas can blow away and then you will have a terrible time welding. By far the best scenario is inside with gas. If you have to weld outside in wind I would use gasless. I welded with gasless first, and once I picked up the gas it was amazing how easy it was to lay a good bead. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

11-06-2006, 10:07 AM	#9
raggedjim Senior Member Join Date: Jun 2002 Location: Murray, Kentucky Posts: 3,476	Re: welding in floor pans... If you're like me, when you bought your welder you got some free flux-core. I used that to put in my floor pans. It was free (kinda) and the welds would never be seen. I bought .023 esab ezgrind and a bottle for the exterior body work, but I figured why use the $$$tuff on things that wouldn't be seen. The gas and thinner wire is easier but you can do it with the flux-core. jmho, Rg __________________ Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer '70 GMC Jimmy 2wd '73 Firebird - https://67-72chevytrucks.com/vboard/...d.php?t=853203

11-07-2006, 11:33 PM	#10
WORNBRAKES Senior Member Join Date: Jul 2001 Location: Hughesville, MD Posts: 1,350	Re: welding in floor pans... You get a lot of spatter with flux and it is a pain to clean up. I would use gas and do short lines so the metal dont overheat or warp. __________________ Mario and Mandy Hughesville, MD 20637 69 C10 305/350 71 K5 Basket case 75 K10 Rescue Parting out 77 MG Midget Parting out 15 6.7L Cummins

05-22-2007, 04:32 AM	#11
DURRTY USMC Join Date: May 2007 Location: SLc,UT Posts: 300	Re: welding in floor pans... When welding MIG (with gas and hard wire) you do have to be careful of wind and also the metal needs to be clean. Any rust, old paint, durt ETC will cause the weld to have porosity and incomplete fusion. Use a wire wheel on your grinder and clean it as best as you can. If there is rust that goes deep and wont clean off with the wire wheel, MIG wont do it, yes it might stick it together but you cant get a good weld. The flux core wire(gas less) rules when it comes to durrty metal. You should still clean it but it wil burn through the paint and rust pretty well. For the spatter there is some help out there. There are products called anti-spatter that you spray on before you weld. It makes the clean up much easier. MIG looks good but looks don't mean that its a good weld. If you can have both types of wire around (and some gas) you cant go wrong. __________________ Semper Fi

05-24-2007, 12:27 AM	#12
BLUE THUNDER Registered User Join Date: May 2007 Location: San Antonio Posts: 993	Re: welding in floor pans... i'm ready to help out blizz. let me know when and we'll have a work day.

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