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#1 |
Registered User
![]() Join Date: Jul 2014
Location: Queen Creek AZ
Posts: 37
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Little Help... Cracks on front upper portion of crossmember
Hello all
I was cleaning my front Crossmember when I saw these cracks. They are on both sides of the plate and on both plates if that makes sense. So the question is, Do I need a new crossmember or will welding the cracks be sufficient? Or do I need to even be worried about it? Thanks in advance for any advice.
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1970 C10 4.5/6 drop from ECE Body off restomod that seems to be never ending. Mama Tried... |
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#2 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Little Help... Cracks on front upper portion of crossmember
Find a welder who has a clue and weld them and be done with it . 75 % of the posters in here don't know what a mig welder is the other 25 % are divided in to 3 groups ...
the other 10 percent -- 1) I've seen a mig welder the other 10 percent -- 2) I have a mig welder from harbor freight it's 80 amps and doesn't need that pesky argon gas and the 5% who have a clue 3 ) I use a mig welder every day it's 220 and will weld anything I want . no disrespect to anyone but some types of welding require a pro .... |
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#3 | |
Account Suspended
Join Date: Jan 2007
Location: Tucson
Posts: 2,183
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Re: Little Help... Cracks on front upper portion of crossmember
Quote:
![]() Seriously though, that is a high stress area, that's why it cracked. Welding with a MIG will just cause two new cracks, one on each side of the weld. If The OP decides to repair the crossmember he needs to fab a splice plate to strengthen that area. A piece of 12 GA Hot rolled, not cold rolled, steel will do the job nicely then get it TIG welded by a pro! |
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#4 |
Registered User
![]() Join Date: Jul 2014
Location: Queen Creek AZ
Posts: 37
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Re: Little Help... Cracks on front upper portion of crossmember
Well that sucks...
Wish I would have seen these before spending two weekends grinding and cleaning. ![]() Thanks for the responses guys...
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1970 C10 4.5/6 drop from ECE Body off restomod that seems to be never ending. Mama Tried... |
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#5 | |
Account Suspended
Join Date: Jan 2007
Location: Tucson
Posts: 2,183
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Re: Little Help... Cracks on front upper portion of crossmember
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#6 | |
Registered User
![]() Join Date: Jul 2014
Location: Queen Creek AZ
Posts: 37
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Re: Little Help... Cracks on front upper portion of crossmember
Quote:
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1970 C10 4.5/6 drop from ECE Body off restomod that seems to be never ending. Mama Tried... |
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#7 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: Little Help... Cracks on front upper portion of crossmember
They can be welded. You'll need to grind a shallow groove along the cracks to get good penetration. That's a pretty straight forward easy weld job.
But like GOM said... I'd weld it with a GOOD mig welder with gas. The cheapo harbor freight wire feeds are good for body panels and the like. Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#8 |
Registered User
Join Date: Oct 2014
Location: Mesa AZ (Near Phoenix)
Posts: 2,302
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Re: Little Help... Cracks on front upper portion of crossmember
What year is the truck? if it didn't come with disc brakes it would be a great time to slide a newer crossmember under there with discs and a nice sway bar. Suburban donors are plentiful in our area and cheap.
I'm in Mesa so not very far.
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"Life is too short to drive a boring vehicle". Later, Wayne ![]() |
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#9 |
Registered User
![]() Join Date: Jul 2014
Location: Queen Creek AZ
Posts: 37
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Re: Little Help... Cracks on front upper portion of crossmember
Its a 70, so no discs. I almost went that route a while back anyway but after speaking with a few board members and didn't do it because I found with the aftermarket stuff it wasn't going to be a big cost difference. But with my situation changing I might just do that. I will have to jump on Craig's list and see whats out there. Thanks for the info...
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1970 C10 4.5/6 drop from ECE Body off restomod that seems to be never ending. Mama Tried... |
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#10 |
Born Psycho
![]() Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,884
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Re: Little Help... Cracks on front upper portion of crossmember
if you decide to weld repair, drill a small hole at the end of each crack. this will stop the crack from "running" after the repair. i have never used a tig but i use a mig every day and for frame repairs i say let a professional do the job. i've done repairs on my own vehicles with my mig and never had any issues.
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jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
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#11 | |
Registered User
![]() Join Date: Jul 2014
Location: Queen Creek AZ
Posts: 37
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Re: Little Help... Cracks on front upper portion of crossmember
Quote:
__________________
1970 C10 4.5/6 drop from ECE Body off restomod that seems to be never ending. Mama Tried... |
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#12 |
Registered User
Join Date: Jun 2013
Location: Carlsbad, California
Posts: 165
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Re: Little Help... Cracks on front upper portion of crossmember
A stamped part like that has a lot of residual stress built into it which is not usually a problem. But after many stress cycles the metal eventually gives up. I would not hesitate to repair those cracks. A skilled welder/fabricator with the right tools can make them like new or better. The original stresses have been relieved somewhat, so part of the problem is solved.
Russ |
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#13 | |
Registered User
![]() Join Date: Jul 2014
Location: Queen Creek AZ
Posts: 37
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Re: Little Help... Cracks on front upper portion of crossmember
Quote:
__________________
1970 C10 4.5/6 drop from ECE Body off restomod that seems to be never ending. Mama Tried... |
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#14 |
Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: Little Help... Cracks on front upper portion of crossmember
Get them welded, the X member will never fall out. Its not that big of a deal as every ones making it, unless you're taking it to the moon....
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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#15 |
Registered User
![]() Join Date: Apr 2007
Location: Foster Rhode Island
Posts: 1,176
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Re: Little Help... Cracks on front upper portion of crossmember
Just get someone to weld it. Id grind it out a bit and stick weld it if it was mine and I used to be certified in in stick tig and mig. That giant V in the middle of that bracket has so much strength on its own I seriously doubt you will ever have a problem in your lifetime as in that bracket breaks and your front K frame falls out going down the road. Those cracks are tiny now and they had 45 years getting that far. Even if the crack came back its not going to snap off all of the sudden. Just my opinion.
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