Butt or lap weld floor pans?

[blubuckaroo]

Is it appropriate to butt weld the replacement floor pans, or can I just lap weld them?

 

[Scoop]

Most I've seen are lap welded - I've done all mine that way. I think it gives a stronger weld and you're not looking for perfect finished seam like you are when you butt weld in a section of body panel.

 

[jmangi62]

Most I've seen are lap welded - I've done all mine that way. I think it gives a stronger weld and you're not looking for perfect finished seam like you are when you butt weld in a section of body panel.

^^^^^ Yes this. Afterwards you can spread some seam sealer to finish it off. Good Luck.

 

[blubuckaroo]

Thanks!
Actually, this is about my Ranchero, but it's parked next to the Bronco.
I was just concerned about moisture getting between the laps and rusting.

 

[1sicbronconut]

I'd use some weld through primmer first to help protect the seam. https://rts.i-car.com/collision-repair-news/weld-through-primer-guidelines.html

 

[Broncobowsher]

Stock panels are lap joints with spot welds.
Do take precautions for water getting in and rusting.

 

[NashBronco]

I just did this and lap welded them just make sure you don't have too much of an overlap. An inch or so is good enough. I usd seam sealer on both the top side and bottom side of the joints to try to help seal it up.

Good luck.

 

[pcf_mark]

Great tips on protecting against rust with weld through primer and then seam sealer after you are done. I use Cleco pins to align and keep things positioned. When done I just weld the tiny (1/8") holes closed almost like a spot weld.

 

[Scoop]

Great tips on protecting against rust with weld through primer and then seam sealer after you are done. I use Cleco pins to align and keep things positioned. When done I just weld the tiny (1/8") holes closed almost like a spot weld.

If you don't have the Cleco pins self tapping #8 zip screws work as well. Yup, just weld up the small holes.