Well I when in town today about 1:00pm to the skatepark about 15 miles away. About 30min later I dive about 2 miles to my buddy's work to pick him up and waited for about 5-8 min with the a/c on full 65 blast. After that we drove about another 2 miles to his house and I sat about another 5 min in the car, a/c still running. Then the a/c get warm and I look down at the temp gauge and its about 1/8in away from the top line
. I then quickly shut it off and checked everything under the hood. I then started it back up and cranked the heat on which cooled it back to normal operation temp. We then drove about 2 more miles to the skatepark and I left it sit. At about 8:30pm I started the car and cranked the a/c on again full blast to try and simulate the heating problem....nothing happened. So I drove about 15miles back to my house a/c still on and not a single problem. This didn't happen before today. The only thing I touched on the car yesterday was an oil/filter change, removed the muffler which is still off the car, and I checked the tranny/coolant lines for cracks. I squeezed the coolant lines a little top and bottom and I think some how I may have damaged the thermostat. So what do you guys think, just PLEASE DON"T SAY HEADGASKETS.