Ya, but that doesn't mean anything. Is coolant blowing out of the pressurized bottle? If it's not, measure the temp of the coolant in the bottle, the temp on the side of the block closer to the passenger side, your radiator hoses, and right where the sensor plugs in right on top of the head. It might be that your gauge is just crap. It's happened to a couple people on this board. Just eliminate the possibility that your gauge is wrong before you start freaking out like I did. If you don't have a laser thermometer use a cooking thermometer to test the temp in the plastic bottle.