I have finally made part 4 of the video. I got a little behind on the videos because I was working on the tractor in my free time rather than making videos, but this video just about catches me up. Since this video, I ave removed the valves and cleaned them. Note that at the end of the video when I am showing the clank, once I removed the piston, I still hear it. So I believe it is the cams (is that what they are called??) that make the valves go up and down.
Check it out, tell me what you think and PLEASE correct anything I have wrong in either this thread or int he comments of the video.
http://www.youtube.com/watch?v=rIqhCKrt9HE