Hello, I am farely new to the site. BUt I have a question. I recently got My 72 N600 started. Cars starts up find and actually drove it around the block. THE problem I have is that one of the cylinders has low compression. ONce has 125 the other 65. I figure the rings are stuck on the piston due to the fact that you can see smoke come out the oil cap when its off. I poor transmission oil into the cylinders to see whether that would help it but the oil drains into the crank case really quick. ON the other cylinder it doesnt. My question is whether there Is anyway that I can get the rings unstuck fromt he pistons without taking the engine apart. SOme type of chemical or anything like that. WOrst comes to worst I will take it apart.