undissolvable grunk in cylinder
Me two cylinder oil lubricated compressor seized up. So I took it apart and found some very sticky stuff in both cylinders. The grunk is softer when it is heated but it is everywhere in the piston and the piston rings and stuck in grooves. The problem is I cannot dissolve the grunk. I have tried gasoline, petrolium, ethanol and brake cleaner with no effect!
Any ideas how to dissolve it or remove it?