Has anyone ever heard about using Coke to loosen rusted nuts? Have you wondered why that works?
I'm with ToddA1 on the torch. Have used the torch many times to save nuts and bolts from snapping into pieces, but only after trying Coca-Cola or Pepsi.
Little known fact - Coke, Pepsi, and other sodas have Phosphoric Acid in them. When Phosphoric Acid comes into contact with Iron Oxide (rust) it immediately changes the composition to Iron Phosphate. Unlike Iron Oxide, Iron Phosphate does not stick and aids in releasing the nut from the bolt without breaking it.
My son and I used this trick to get the drums off his 1972 Chevelle that had been sitting in Kansas since the mid 80s. We tried most everything beforehand and then remembered "Grandpa" telling us about Coke on rust. When we sprayed the lug studs and center hub with the coke, let sit for about 30 seconds, maybe a minute, and the drum almost fell off the car. We were so shocked we did the same on the passenger side. Pulled on it with the slide hammer first and it didn't move. Sprayed the lug studs and center hub with coke and the passenger side came right off as well.
Forget penetrating oil to get things off. Use it to put the nut back on for lubrication. Or put on some anti-seize to prevent rusting of the threads.
Easier life through chemistry.