I know I am probably screwed because this is going to end up being a blown HG just from reading all the problems on here that ppl have with these cars. After I drive the my outback on the freeway for only 10 miles or so and then pull off onto a sidestreet, the temp. gauge shoots up and it starts overheating. If I only drive on the side streets, it never seems to over heat. I replaced the thermostat with a Subaru OEM part and also replaced the fluid. Both fans are coming on and seem to be working fine. I don't notice anything leaking. I do smell antifreeze when it overheats. I have notice that there are bubbles coming up from the overflow hose in the overflow tank when the car is running. I guess I should assume my HG is screwed and I am also. The temp. outside right now is in the low 30s so I am surprised it is overheating. What should I check first ? I really can't afford 1300 bucks to get a head gasket done !