I found how to bleed the cooling system and I did that and it worked for several months. But last night I was idling and noticed it was a little over the middle. Well I shut it off and it kept creeping up. Sat there and it went all the way to just under the h. Soon as I started it back up when it was about 3 quarters of the way so I could get some air flow on it with the heater wide open it just jumped to the middle. I'm thinking it's my t-stat being stupid. Cause this is twice now it's just dropped to The middle soon as I started it.