Tips removing seized bed bolts

Looks like you already got it but Kano Kroil is the best thing I have ever used.

Kroil Original Penetrating Oil (Drip-8oz Can-Single) | Penetrant for Rusted Bolts, Metal, Hinges, Chains, Moving Parts | Rust, Inhibitor (KL081)

https://www.amazon.com/Kano-Kroil-P...ocphy=9061155&hvtargid=pla-548961577674&psc=1

I understand about the leaking gas if it was not for that I would go with heat.
It took a while before I gave into it but now I am sold. I heat the bolt or nut just to change collor, let it cool just e little then I can ratchet them right out. The expansion and heat breaks the rust bond. I have been able to get parts loose the Mechanic said could not be done.
I also keep a fire extinguisher, and water hose on quick stand by.

 

Looks awesome. I also recently read a scientific analysis that showed a 50/50 mix of acetone and automatic transmission fluid is one of the best concoctions of penetrating fluid

 

Kroil or 50/50 acetone and trans fluid are my go-to remedies. Both are better than PB Blaster. Then, low pressure air impact and let it thud slowly on them in reverse, then a quick hit forward on some, then back into reverse.

If that fails, torch time if it can be used safely.

 

Mine is too much for lug nuts and it is a 650. How much PSI? I am running 150 and it is rediculous.

 

one trick I have for rust seized bolts and nuts is to tap them with a hammer, as it will break some of the rust in the threads. Heat sometimes work too

But sometimes rust is stubborn and there's nothing to do other than drill and tap

 

I'm working on a bed swap and the same thing happened to 2 of the bolts on my truck. The welded nuts are spinning inside the crossmember.

How should I proceed with removal?

 

living herein Pa I tried once for about 8 hours .

Now I just use the torch and don`t mess around

 

ATF with acetone works better than kroil or PB blaster, have used all three. Never heard of it till I joined this site. I mix a dab in a cup as needed and use a small paintbrush to apply. So far, hasn't failed from engine block bolts to bush hog blade bolts.