I have removed the oil pump from my 22re to check if it is ok or needed to be replaced. When pulling it from the timing chain cover the 2 gears came apart from the oil pump housing. I was going to reinstall them and noticed that the gears have marks stamped on them to line up to something? I have looked at the FSM and it does not go into tearing apart the oil pump. Does anyone know what the marks are for?