Mechanic checked the puge line and said its fine. Thermostat I changed because it was never done before and the water pump went on the car so I had to replace. Temp gauge is at the 225-250 after 15 min of driving and will go up and down. Then will go to redline after an hour. Mostly redlines on the highway and have to pull off to let it cool down. But all this varies and redlines even city driving if I've been on highway for 30 min.