there is two ways to split a nut
you need a really sharp and hard chisel (not one for wood)
if the stud is pointing at you, put the chisel edge on the face of the nut, and hit it in towards the flange - you are splitting it in the same direction as the length of the stud.
If you cant do that, the put the edge of the chisel flat and square across one of the edges (that you would put a wrench on) and hit it firmly to imprint a line, that will be along the same line as the length of the stud. Then angle the chisel up, so its not aiming at the center of the stud, in the direction that will make the nut unscrew, and wack it good a few times.
This will either act as an impact wrench, and the shock will free the nut from the stud, and it will start to unscrew, or it will split the nut on one edge (again lengthwise with the stud) - and once the nut splits it will easily screw off the stud.
Ive done this on some nuts that are really hard to get a wrench on with some car engines. It seems like a crazy way to unbolt a nut, but it works.
this video sorta shows how to do it with a chisel: https: //www.youtube.com/watch?v=Ow5qtwRrNPU <take the space out, or seach on youtube for: 8thDec13 Split nuts with a chisel
there is also a tool you can get, if you can get the tool on the nut.
Last edited by KCW; 01-15-2019 at 05:39 PM.