Re: Seized Diesel engine.
Many years ago i freed a little 1970 Honda SL100 motor, it was locked solid, rusted shut. Rain through the plug hole.
I'd stripped it down, the piston was half way down the bore. I filled hole with a mix of diesel and petrol, set the thing on the dirt floor of the workshop and lit the bore on fire. I was 12, I liked playing with gas and petrol. when the flames and smoke had cleared, I used a wood block and whacked it, to my amazement it freed. I honed the bore, buffed the piston, and installed new rings as the originals had come out in pieces... many pieces.. Rode that little bike every Sat Sun for 3 years until I got my licence and a larger bike. The thing is still free and sitting in my workshop in NZ. Been another 25y now since it last ran.
Si Dieu n'existait pas, il faudrait l'inventer -- Voltaire