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Cracked chassis motor mount

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Old Jun 10, 2024 | 04:21 PM
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Cracked chassis motor mount

My passenger side chassis motor mount has a crack in it. Would you grind a little “V” into it and weld it up, or would you replace it?

I have a 120v MIG140 with .030 flux core wire. If I weld it, that’s what I would use.

what’s everyone’s advice?

 
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Old Jun 10, 2024 | 05:27 PM
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3/32 E-7014 @ 90 amps
 
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Old Jun 10, 2024 | 05:45 PM
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Thanks for your input.
I take it that you mean stick weld it or get a new one.
 
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Old Jun 10, 2024 | 05:58 PM
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Originally Posted by HertzHound
Thanks for your input.
I take it that you mean stick weld it or get a new one.
I'd weld it with that which I'm long acquainted, I have my old box, I know it well, and 3/32 E7014 is my "preferred rod", and I'd just clean the metal and weld. It's thin enough that the weld is gonna penetrate so I'd not vee it. I have other choices, but that's what I'd do.
 
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Old Jun 10, 2024 | 06:35 PM
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I wouldn’t hesitate to weld it. Grind whatever depth is necessary for full pen. That said, know your abilities.
 
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Old Jun 10, 2024 | 07:30 PM
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“That said, know your abilities“, that’s the part that scares me . It’s such a short weld, I have to get it right quick.

I’m new to welding. At this point the only way this restoration is going to be possible, is if I try, and hopefully succeed at doing the body work. So I bought a Mig welder. I bought it earlier than I planned, because there was a crack in a weld in the rear cab mount crossmember. Since I bought it, I figured why not do one of those cab saver washers for one of the front body mounts that was questionable. I watched videos and practiced on and off for a few weeks. Then the perfect weekend came up to paint the frame. It was now or never to do the repair washer. In the end I’m fairly confident I did an ok job. I’m almost afraid to post these, just take it easy on me






 
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Old Jun 10, 2024 | 07:34 PM
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It looks like I need mor practice with painting too.
 
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Old Jun 10, 2024 | 07:56 PM
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Haha, I won’t grade you but it looks stuck together pretty effectively.
 
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Old Jun 11, 2024 | 09:39 AM
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Originally Posted by HertzHound
“That said, know your abilities“, that’s the part that scares me . It’s such a short weld, I have to get it right quick.

I’m new to welding. At this point the only way this restoration is going to be possible, is if I try, and hopefully succeed at doing the body work. So I bought a Mig welder. I bought it earlier than I planned, because there was a crack in a weld in the rear cab mount crossmember. Since I bought it, I figured why not do one of those cab saver washers for one of the front body mounts that was questionable. I watched videos and practiced on and off for a few weeks. Then the perfect weekend came up to paint the frame. It was now or never to do the repair washer. In the end I’m fairly confident I did an ok job. I’m almost afraid to post these, just take it easy on me





No shame in that. You won't learn if you don't try. That Mig welder will do just fine with that crack, especially if you v it out a little. Good thing is you can look at the backside, and if it didn't penetrate you can run a bead on the back too. I welded miles of wire with my old Lincoln 140C, never had a weld fail. Consider upgrading to a gas bottle in the future and switch to solid wire, you will enjoy it much better.
 
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Old Jun 11, 2024 | 10:25 AM
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Originally Posted by ford141
No shame in that. You won't learn if you don't try. That Mig welder will do just fine with that crack, especially if you v it out a little. Good thing is you can look at the backside, and if it didn't penetrate you can run a bead on the back too. I welded miles of wire with my old Lincoln 140C, never had a weld fail. Consider upgrading to a gas bottle in the future and switch to solid wire, you will enjoy it much better.
I feel like I’m the only guy that preaches for flux core. Lays way flatter when doing sheet metal and can handle thicker material than mig with the same machine, and it’s good enough to build buildings with. I only like mig when running spray transfer.
 
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Old Jun 11, 2024 | 10:49 AM
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What grade if steel in that washer ?

I was once told, it doesn't matter how your weld looks if you have a good grinder.. LOL..
 
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Old Jun 11, 2024 | 11:00 AM
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I welded up one I had, old Miller 120 MIG .035, been welding untrained and unprofessionally since forever ago when my dad let me use his Lincoln to fix my bike, then he kind of instructed me and let me weld some a trailer hitch he was fixing for someone. And as aquanaut20 stated, long as you have a good grinder, and your weld holds.. I've never claimed to be good, but I'm good enough for what I need done! And plenty of others I've welded/fabricated things for.. hoping to take a welding class at some point so I can find out everything I've been doing wrong for 50yrs! lol

Yours looks like it'll last another 40+ years!
 
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Old Jun 11, 2024 | 11:27 AM
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Thanks everyone.

I bought a mid size bottle 75/25 mix, and .023 solid wire when I bought the welder. But then after practicing and reading the chart, it looked like I would need the .030 flux core to do a good job on 3/16. I still wasn’t doing great, and then I saw a video about different brands of wire. So I bought a 2lb spool of Kiswel .030 made in Kentucky. I know it’s a bad craftsman that blames his tools, but this wire is nice, and I noticed a difference.

I don’t know what the repair washer is made out off. I assume mild steel?

I’m thinking of making a small arbor press with an old bed frame and a bottle Jack. Something small that I can clamp in a vice and do universals with. I usually make do with a “C” clamp or just the vice, but the universals in the front Dana 60 looks like it might need a little more, and I need the practice welding.
 
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Old Jun 11, 2024 | 07:22 PM
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Hertzhound, I like the idea you are thinking outside the box and making your own work holding device, Koodose to you. many people head for the catalogue and since each of our fixes are usually unique, you will be the guy doing the best job. I used to use flux core wire welding galv. sheetmetal. I use Lincoln/Century brand wire and couldn't be happier solid core with Argon/CO2 mix. I'm would be the last one to disagree with someone who has familiarized them selves with Flux Core, but it is not my cup a tea. I like to be able to adjust my shielding gas for different situation. I took welding back in the 1970's at Vocational School and learned some amazing characteristics of metal and application. It sounds like you may just get started and welding in restoration and general repair is a huge plus if a guy can do it himself and feel comfortable with you job when done. Looks like your job will hold but if you need a good grinder after you've done the welding, well there are some adjustments that should have been done. Yes, I have wore out a few grinder wheels myself whe i was in a hurry or positioning was an issue. Keep up the good work!
 
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Old Jun 13, 2024 | 10:44 PM
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Ran mine cracked like that and welded for 10 years until got wrecked a year ago. and wrecked it got; welded it and it cracked right next to weld soooo I welded a bunch of beads top and bottom back in 2016 and ground it on top to flush mount motor mount didn't crack, but the 400 tore the then new engine mount apart on the drivers side.
 
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