loose rocker arm

I have a loose rocker arm I don't know what one because I haven't pulled the valve cover off. I was told that leaving it for now isn't going to damage anything but I want to know how to tighten it when I have the time to do it because it will get done, I just cant take it apart right now because it is my only vehicle.

well IIRC your engine has Hydraulic Adjusters, so it's either stuck or collapsed. it only 2 bolts to get the cover off and it's a rubber gasket. so pull it and have a look.