If it's not leaking too bad you can clean the surface up really good and then put some permatex form-a-gasket around the hole and let it cure before you run it again. Ideally you should take it out and redo it, but the sealer should be fine. I try not to use rtv silicone anymore. Lots better stuff out there to use.

When I installed the cam plug on my last engine I sealed the outside of the hole up with 3M fast + firm body sealer. Dries hard as a rock in a few hours and is hanging in there just fine.