Tell ya what happened to me. First, the fascia overflow bottle was leaking from the screw puncture syndrome. Fixed that but she kept sending fluid to the overflow and wasn't sucking it back in. It had a new radiator cap (crappy one), so I got the factory one everybody recommended here. Problem 2 solved. Now with the system under full pressure, the next weakest link was a pinhole in the radiator. Pulled it and had a pro radiator shop pressure test it and repair. Threw in some new hoses and the Roe Radiator Bleeder on the reinstall. She's tight now!