Started my car and it sounded strange along with barely starting so I turned it off then restarted it. Car started fine. I turned on the AC and let the car idle. Minutes later my temp needle went to the top. I turned the car off and smelled nothing burning or nothing hot. Checked the coolant resivour and it's filled to the max like it isn't flowing down thru its areas. The upper hose is full of fluid as well. I don't get it. Is there a blockage? Could the water pump be failing? I dont have any leaks either*