I have a '99 legacy outback w/ 125K miles, it was overheating, temeprature gage quite high, but no boil over. I noticed that the top radiator hose was collapsing. Ok, old hoses, I thought. So I replaced hoses and still it would collapse. I also noticed the coolant overflow container was quite full. I finally replaced the radior cap, even though it looked OK, and now the level in the coolant overflow container is correct and it hasn't over heated again. Has anyone seen this problem before? I added some Bar's head gasket stop leak to the collant, in hopes that I can prevent or mitigate any head gasket leaks. I'm keeping my fingers crossed.
-Nick