Motor unfreezing

Last weekend I fabbed up this tube steel jig. The threaded rod matched the size of my largest tap - 1/2 with 13 tpi. I put a chunk of aluminum flashing under the rod so it wouldn't dig too much into the piston.

I still need to make a guide of sorts to go inside the cylinder so the rod doesn't walk, pulling the cylinder studs over. For now, the combustion chamber is soaking in a puddle of Kroil.

I don't care too much about this cylinder as there are broken fins, but it's good practice if I have one that I do care about come through...

Here you can see the two nuts and a washer I used to turn the threaded rod. This works ok, but it's too long and tends to slip under high torque. I'll probably end up cutting off a short chunk of the rod and just welding the nut onto it.