welding in new body panels

[Rustbucket]

I have a 91 blazer with the normal floorboard rust. I have a little century 110 wire feed welder with no gas. I just use flux core wire. I can weld fairly decent with it on thicker stuff, but when it comes to the floor, it just burns through. Right now , I'm just practicing by patching up the holes, but soon I want to buy some replacement floor pans for it and do it right. I have new rockers ready to put in, but don't want to burn them up. Please don't tell me it's because I have a cheap welder, I know, it was free. Any hints or suggestions would be great. Thanks in advance.

 

[Don]

Try one little spot weld, let it cool a little, spot again, let it cool, spot again, cool, spot, cool, spot, cool on and on.

Turn the heat down a little. /forums/images/graemlins/grin.gif

 

[gravdigr]

You really need a true mig for thin patch panels. Gasless flux core only comes in .30 and higher. That is a bit too much heat. I have a cheap craftsman welder that can use gas or flux core. The only time I use the gas is when welding patch panels as I can use the thinner wire, .25 or .23 I can't remember which it is off hand.

Just try to run the lightest heat you can and do the small spot welds.

 

[K5MONSTERCHEV]

Stich welds work really good, go from the thick metal, to the thin metal. Thats how I did mine and no problems with blowing holes.