I was recently given a V2203 that has sat outside for maybe 6 months. Using a screwdriver and the teeth on the flywheel, I can get the engine to rotate only 270 degrees. It makes a clink sound and stops when rotating to the right. It makes a grinding sound just before it stops when rotating to the left. I pulled the valve cover and saw no signs of a sticking valve. I fear I may have rust in the cylinders. Is it worth the effort to pull the head and look deeper into the problem or should I take it to the scrap dealer?