I was attempting to change the oil, when I realized I had removed the wrong plug, and a spring and a bullet shaped plunger fell out into the oil drain pan. I've tried to find a parts diagram, that would show how it's correctly installed. I would guess the plunger goes in first, then the spring behind it, then the plug I thought was the drain plug. This would keep tension on the plunger. Does anyone know for sure? Any help would be greatly appreciated!