What I mean is, gravity definitely has an effect on how it works. Just faces it uphill at 1500 RPM could not get over 175 degrees. Downhill, 2000 RPM 190-200. Sorry for the multiple posts, keep updating this as I mess with it. Phone will not let me edit posts. Anyway, final plan - take it apart and add pump. I'll go from there. I have a feeling that should do it. But again, just in case head gasket is bad - will I not hurt anything if I keep an eye on my temps while operating just in case it is?