I have a 50cc 2 cycle engine that someone left the head off of for years and it rusted the rings in place. I have the head loose and raised off the block a bit so I know it's just the piston, not the crank.
I filled the top half of the cylinder above the piston with Evaporust and let it sit 24 hours. I repeated the process with the exhaust port and was even able to fill and soak the cylinder below the piston by turning the engine upside down.
The exposed cylinder is much cleaner but the piston rings are still stuck. Suggestions? Heat? Other chemicals that might penetrate? Brute force? I want to at least salvage the aluminum piston if possible.
I filled the top half of the cylinder above the piston with Evaporust and let it sit 24 hours. I repeated the process with the exhaust port and was even able to fill and soak the cylinder below the piston by turning the engine upside down.
The exposed cylinder is much cleaner but the piston rings are still stuck. Suggestions? Heat? Other chemicals that might penetrate? Brute force? I want to at least salvage the aluminum piston if possible.