I've had a 364 for years and I thought the same thing too when I first got it. Then, an old man told me "They just run hot," so I quite worryin' about it. I once ran it 130-135 mph for three solid hours on a backwoods two-lane hiway w/o one single issue, nor after. It never overheated and runs great. It's true however that when at operating temp, it doesn't like to sit and idle in bumper to bumper traffic at which time I have to turn on the heater full-blast (in summer) to dump the extra heat.