Weld Patch Panel
 

I have been learning how to weld as part of the rebuild of our 65 GMC. Starting to figure some things out, but I have a long way to go.

I have welded in a few patch panels on the body and have always tack welded in different areas of the panel until I have fully welded the entire patch panel.

Unfortunately, the PO cut holes in the back interior panel to install some speakers. I am going to weld in a new patch panel. For an interior job, do you really have to tack weld the entire panel?

I figured if I tack every 1" it would hold the panel secure. Then I could skim coat the area and block sand it.

I appreciate your opinion.

Re: Weld Patch Panel
 

How about just patching the speaker holes? If you are going to weld over it, I'd weld the whole thing.

Re: Weld Patch Panel
 

That is what I am planning on doing. I will patch in new metal where the speaker holes are.

Re: Weld Patch Panel
 

I would think that if you welded sections wouldn't you get warping? Since you would be applying a lot of heat to a small area? I thought it was better to tack in alternating areas to allow the metal to cool before applying more heat. I'm just asking and not giving advice since I've only done rusted out window channels and holes in doors, fenders and pannels.

Re: Weld Patch Panel
 

That is really what I am worried about.

I cut out a square section about 6" x 24". I will have to go slow to avoid warping the metal. I am trying to find out if I have to weld 100% of the panel or if I can tack weld about every 1".

Re: Weld Patch Panel
 

I guess it all depends on what you want to do. Grind or fill with bondo. I'm thinking that over time unless it's fully welded the filler will crack or show the work done. I would weld it all the way around, grind, and fill. That way you know that you'll never have to go back and fix it later, or when if or when you sell the truck you won't have someone asking questions about it.