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Welding rust?

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Tom D. Smith

02-27-2001 12:39:44




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Have a question as what to do I have a 68 1tn truck with alot of rusted out places worst is where the wiper motor mounts in the cowl behind the dash,very little metal left to hold the motor. Would a little brazing be good and then "J-B weld" type epoxy and a tin patch. It is tight unless I cut out some of the cowl. thank you Tom (with a rust bucket)




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Fred OH

02-28-2001 07:25:03




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 Re: welding rust? in reply to Tom D. Smith, 02-27-2001 12:39:44  
Have any of you guys ever heard of a tool called a pop rivet gun? Maybe you better get acquainted. L8R----Fred OH



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Tom D. Smith

02-28-2001 12:59:07




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 Re: Re: welding rust? in reply to Fred OH, 02-28-2001 07:25:03  
Mr.Fred,

Yes I know the beast quite well have 3 of them the problem is access in the tight space and wanting the rivet head to be on the outside under the wiper arms assembly could do it on the inside of the truck and try to seal the rivet.

thanks Tom



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T_Bone

02-28-2001 07:34:16




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 Re: Re: welding rust? in reply to Fred OH, 02-28-2001 07:25:03  
Hi Fred, but a pop rivet will not be completely tight to the base metal and will loosen to some extent because of viberation. A weld will be tight and sealed.

T_Bone



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Fred OH

03-01-2001 04:12:55




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 Re: Re: Re: welding rust? in reply to T_Bone, 02-28-2001 07:34:16  
Hi T_Bone, Too hard to seal with welding on old rusty metal and a mig will burn through it too. Also too much risk of setting something on fire under dash. Should be pop riveted or bolted and sealed with RTV (room temperature vulcanizing) L8R----Fred OH



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Tom D. Smith

02-28-2001 05:53:33




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 Re: welding rust? in reply to Tom D. Smith, 02-27-2001 12:39:44  
Thanks to you all for the good tips the biggest problem I have is access to area. A friend has a wire welder will check what size of wire he is using and will get the "heat dam" stuff.

Tom



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T_Bone

02-28-2001 04:22:10




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 Re: welding rust? in reply to Tom D. Smith, 02-27-2001 12:39:44  
Hi Tom, Besure and tack weld the SM every 1/2" so when you weld the patch won't warp away from the base metal. I like to braze weld patchs in because the base metal usually has alot of stress and the brazing relieves the stress. Tie/bailing wire works good for a filler rod. Sounds like this patch is not going to be a work of art, so consider running the new patch edge to where the base metal makes a bend and put your joint there as it's stronger.

T_Bone

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Steve U.S. Alloys

02-27-2001 14:02:00




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 Re: welding rust? in reply to Tom D. Smith, 02-27-2001 12:39:44  
Hi Tom,
If you have a wire welder with .023" wire that should allow for a nice sheet steel patch to be placed. You could size the patch so the original metal can be left in place. Just make the patch big enough to weld to good clean metal on the edge and seal it afterwards. (I personally would cut out the old rusty stuff.) A tube of heat fence will prevent warpage whether you wire weld or braze it in place. Heat fence on the back side will help prevent heat damage on the back side of the fire wall.

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