one thing you might want to check is too see if that big plastic peice that covers the underneath of the rad and part of the engine at the front of the car is on or not. I flushed my rad a month ago and never put back that shroud and well wouldnt ya know the temp went up about a letter or so on the gauge! Im due for an oil change in the next couple days, probably will have time fridaay, so the shroud is going back on, I bet ya any money it goes down.