Recently I purchased a GTS because my old celi was destroyed due to a reckless driver on the road and this new one has been overheating since I got it earlier this week. At first it was overheating when I turned on the A/C but now it looks like it is overheating without the A/C. The symptoms so far have been that the needle gets to the middle and then eventually goes back down to normal, only once has it hit the "H" and then went back down. My guess is air in the system because 1. I already added coolant and 2. it cools back down eventually (fans stay running though so its still above normal temps) The problem with this though is that I was reading the manuals and I am unsure of where to bleed the coolant from and when should the bleeder plug be on and when should it be off to avoid more air getting in during the flushing process. If anyone has any tips on the procedure that would be very helpful. This is my 3rd Celi and all 3 of them have had overheating issues when I bought them.