Okay does anyone know a trick on how to burp air that is trapped in your cooling system. Don't know for a fact that this is what's going on, but I'm running out of ideas. I have a brand new radiator (AFCO), new water pump,new thermostat and new water pump. All of this on a new 350/330hp crate motor. Sitting at an idle the motor runs at 180 degrees with the fan kicking on and off like its supposed to. But when driving the temp will run normal for awhile then go up to around 225-240. It won't stay there long but I don't think that this is normal. It reminds me of when a thermostat sticks, but I've put 2 new ones in.(180 degree) I've even put a new temp gauge and sending unit in. I'm running a 16 lb cap. Any ideas?