Ok i am having more problems out of my STI! I have researched it and still cant find an answer. So I figured id make a post to see if anyone can help me out. I have a 2004 STI and the problem is that it keeps running hot. I have replaced the thermostate and coolant lines. My radiator is staying topped off with coolant. But the canister that holds the coolant for the trubo does not stay full of coolant, and when it does run hot the coolant that is in that canister tends to cook or boil. I also believe that it takes the coolant out of the canister and dumps it in the reservoir that is next to the radiator. I have no idea what this problem is so any help would be much appreciated. Thanks for your time in reading this post!