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Author
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Topic: my bad luck...welding question
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Casey90GT
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Member # 6175
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posted
 
 
I just took my car to a local shop that is pretty well respected for performance oriented welding. I had them install my Maximum Motorsports full length subframe connectors, and they said they did tons of subframe connectors, no big deal. Anyway, I got the car back and as soon as I got home I got under it and looked at the work. The welds look really good, good penetration, no porosity, but they welded right through the powder coating on the connectors and the paint on the undercarriage. What should I do? Should I run it? Should I grind all of the welds off, by new connectors and find somebody else to do it? This sucks! I had a perfect notch and now I have a hack job.
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Some day I'll finish it.
Posts: 1064 | From: Santa Rosa | Registered: Nov 2005
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TOPnotch
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Member # 1340
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posted
Well you can't weld on powerd coat or paint for that matter. And last time I checked a weld with good penetration takes a little heat? Just sand off the areas of powder coat or paint that is burnt ans spray a little touch up paint on the areas. Sounds like a normal sub frame install to me? ![[patriot]](graemlins/patriot.gif)
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The bitterness of poor quality remains long after the sweetness of low price is forgoten!!!
1QWKCHP
1QWKDRP
Posts: 2255 | From: Hayward | Registered: May 2002
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Blind
2.3L
CAFords OG
Member # 3052
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posted
quote:
Originally posted by TOPnotch:
Well you can't weld on powerd coat or paint for that matter. And last time I checked a weld with good penetration takes a little heat? Just sand off the areas of powder coat or paint that is burnt ans spray a little touch up paint on the areas. Sounds like a normal sub frame install to me?
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did you expect them to glue them on?
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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Casey90GT
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Member # 6175
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posted
No, I mean that they didn't grind off any paint or powder coat before they welded the pieces together. I don't know if it is a problem or not. Like I said, the welds look pretty good, but the MM instructions say to grind off the paint and powdercoat prior to welding. Everything I have read says that if you weld on a painted surface, the paint will contaminate the weld. I guess I was wondering if this could pose a problem to the subframe connectors holding up, or if it just makes it harder to weld?
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Some day I'll finish it.
Posts: 1064 | From: Santa Rosa | Registered: Nov 2005
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91Trunkster
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Member # 6598
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posted
Sounds like they did it right.
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(510)375-1589
Posts: 1648 | Registered: Mar 2006
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66 AC COBRA
Nitrous King
Member # 904
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posted
you grind off a small part for the weled, they did that for sure, because the arc wont start on powder
its the residual heat that burnt up the rest of it, take a wire wheel to the burnt areas, good primer, good paint, by good i mean expensive srpay can stuff, not $.99, or even better yet brush on some POR15
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Casey90GT
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Member # 6175
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posted
Okay...sounds like I am alright then. Thanks for the help guys!
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Some day I'll finish it.
Posts: 1064 | From: Santa Rosa | Registered: Nov 2005
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