noheat, I'm wondering that same thing but not really sure how to check it. It's all hidden inside the heater box or whatever it's called and controlled by an electrical actuator that is screwed on top.
EddieS'04, I've done that in the past too but I didn't do it with this one.
Here's a little update. My gas mileage on this last tank of gas dropped from around 17 or 18 where it normally is every time down to 12.5 mpg. I did have a good bit of idling while looking into this cooling problem though. The driving was the same type and speeds. Makes me wonder if something is wrong that is causing the drop in mileage and heat temperature. Also, while driving on the highway last night, I decided to kick it out of overdrive and let the RPMs ride a little higher. I heard a little bit of gurgling which would normally indicate air in the system. After a few minutes with the RPMs higher, I got pretty good heat again. After putting it back into overdrive though, it went back to being barely warm. So, is my water pump not moving enough water, or is my heater core partially clogged, or is there still air in my system or is it something else? Any guesses or suggestions?