Hey guys does anyone know if our valves close and stay closed when the motor shuts off only reason I'm asking is because I lost a washer possibly in my head port now I used an extremely strong telescopic magnet and I'm finding nothing I have swept and inspected all my valves they appear closed and I am seeing nothing....is it possible the washer dropped past a valve onto my piston? This would be awful...once again I am not sure the way this happened was I was removing lower intake bolts and a washer fell off a bolt got wedged inbetween lower intake and head where the gasket sits well I was taking off my kenne bell anyway I removed lower intake completely and gaskets and do not see the washers I have looked everywhere and can't find it....what are the chances it's slipped past a valve?