Hi Guys, I have a UK spec 2.0 n/a 2003 model year Forester. The vehicle has developed a overheating problem. About two weeks ago after a 30 minute motorway journey , i noticed the gauge go up higher than normal it did not hit the red but it was way up there. On inspection i found there was like a frothy residue in the expansion bottle and no fluid. I allowed to cool down and top up the level . No overheating again , the level did seem to drop slightly but no obvious signs of leakage. I put a radiator stop leak in the system hoping that if there was a minor leak it would seal it. I have to admit that adding this did cause overfill of the expansion tank. On my first motorway journey i noticed the gauge go up again , when i pulled over the expansion tank was right to the top bubbling over. I allowed the vehicle to cool down and set the level in the bottle back to the correct level. I assumed the bottle spilled over because i had overfilled , however the vehicle did exactly the same thing this morning , gauge up and bottle level had risen right to the top again. Any ideas ?? , i am really hoping this fault is not the head gasket.