Well my car has been running hotter than normal lately, alomost to the point of overheating. So i flushed the radiator last week and did a 50/50 mix of dexcool and water and added some water wetter. The car runs a little cooler now but it still runs hotter than it normally does. I have the 160t stat and hypertech programming. The new fluid looks dirty already so i think theres some rust in the radiator. Should i try replacing the radiator? If so how much does a new radiator go for and who should i get one from?