How to MIG Weld Long Seams in Auto Body Repair

This video shows how to MIG weld long seams in auto body repair. Includes tips on controlling heat, preventing warping, welder settings and more.

[BobVan]

Great vid. I’ve always used a bucket of water and a wet and dry rag and back step welding to control heat spread/ warpage. But “stitching” works well too, and it’s not always necessary to have a full weld when you can plug weld or stitch weld and use sealer and filler.

[almierz]

HEY. JERRY,
IT'S been awhile, I'm seeing this the 1st week of 2023. Hope you had a Happy
Christmas and a Merry New Year .
Great video, YOU had me laughing at the end of the video where you pulled back to show the complete door . I was expecting to see a nice door but it was dented and wrinkled just above the midline . That was GREAT. !
I wish you good health and prosperity in 23, I'm still recovering and HOPE to get back to restoring my 70 Boss 429 this year, Lord Willing .
As usual, keep up the good work, I'll keep watching.
Al.

[roberttemplin]

You need to weld the hole seam shut, and after you grind the weld down .
Put a bright light behind the panel, and look for pin holes. Weld the pin holes shut. If you don't get all the holes sealed up you will get rust blisters within a year.
Moisture is in the air. It will find the pin holes. That's why putting just body filler over a rust hole doesn't work.
Body filler absorbs Moisture.
If you are going through all the work of welding a patch on. You might as. Well do it all the way, and get a lasting repair out of it.

[bjr]

Another great video! I really enjoy your videos. Especially after working from home for the last 4 weeks. Thanks! 👍🇺🇲🍻

[UndergroundPaintKing]

You make it look so easy Jerry...great video!

[frankm]

The jedi master has done it again. Looks great

[joeg]

Thank you for making very informative videos.

[paulpollack]

Always look forward to your next video. Thanks for all the information you share.

[moparnut]

Very nice I used this same process on my dart for the quarter panel but I used a blow gun in between to cool the panel down to.

[johnblackburn]

Great job very neat. Would it be worth using some seam sealer on the back if you can get at it. Or is that just belt and braces over the top

[dwaynelejeune]

Awesome vid but have a question. Would you just butt the pieces up? Or you and panel flanger tool?? What would be wiser for 1st timer??? Keep up the great vids

[brucewalters]

Excellent video... As they all are.... Thanks...

[bruceturek]

neatly done and as always very informative thanks for sharing

[jamesquilty]

Do inside to out on either side and usually 3 to 4 shots tops in each spot it will never warp .

[bobcrouch]

Do you have any tips or videos on plug/spot welding upside down. Very difficult. Any help would be greatly appreciated. Thanks.

[SirShameless]

I don't understand why you didn't weld the entire seam, short of cutting corners and saving time and materials. The patch will not be nearly as secure as the original sheet metal would have been.. If i was caught doing something like that on any panel I've sectioned together I'd lose my job.

[tooldemoguy]

Are you applying etch primer to back-side of weld to coat? Whats your process for back-side after patch/repair?

[ezelk]

Nice work. What were the settings on your Mig welder? I have a Miller 211 so I know that it will be different. Just curious.

[tony]

Can you show the rest of the process, such as tapping down the metal?

[davidalvarado]

I have a harbor freight 100 dollar welder.do you think itsa good enough.or should i upgrade