For a year or so, my needle has been sitting near the max line on the guage. I never paid much attention to it in the past so I'm not sure if it's normal or not. If not, what could cause that? I'm still having a really bad overheating problem, could it be related somehow?
Mine points to the L and doesn't have an overheating problem. The stock gauge is more of a dummy light. Either you have it or you don't, as long as it's in the normal range your fine.