Learn some basis

來源: 於 2011-01-25 13:11:47 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

Valve face is the place where valve and valve seat meet and seal. Google valve face and see what is valve face.  For interference engine, the valve margin will hit the piston top, distorting the valve face and therefore fail to seal.  It has nothing to do with the valve stem.