Hi Scotty. Happy holidays. Thanks for the helpful advise. I have a Pontiac g6 2007. The temperature gauge bounces below and above 225. I have plenty fluid. It's a pressurized reservoir. It looks empty. I take the cap off and it fills up. Someone ran a metal tee between the hoses below it. I'm sure a piece is supposed to be there. The tee connects to the hoses coming at the bottom of the reservoir.