Well, this isint exactly a beginner question but I am posting here for the benefit of anyone else with the problem.

Last week I broke-in and flew a OS FS110A on a Reactor Bipe. Having not touched the airplane all week, I took it out yesterday to fit the cowl. Then I found it had no compression whatsoever. After much breaking my head over what could be wrong, I opened the valve cover and found that the cam pushrod for the suction valve that goes to the tappet was no longer connected under the tappet. Further, when the crank was turned, it wouldnt move either. That prompted a complete engine disassembly, my first on a 4c. I found that the cam follower for the same valve was stuck in the engine casting. A firm tap with a nose plier handle and it dropped into the cam case and I was able to take it out. I found it had a dark circle of rust all around. The exhaust side follower was also rusted in the same place but less so. Also the crank part that meshes with the cam gear was very dark brown in colour. Dont know what I could have done with the crank, but I lightly polished the followers with sandpaper and the rust band was gone. Then simply oiled and reinstalled everything and now the engine has a LOT more compression. In fact its so tight, I can only just about turn the prop over compression by hand. Is there some issue with this engine and has anyone com across such a problem before?

Ameyam