i will tell you my symptoms when i had blown head gaskets. I would be driving normally watching the temp gradually go up, and if i got on it, i would see my temp gauge rise extremely fast... Also, i had allitle more smoke coming out of one tube than the other, i didnt know if this was just regular condensation or not. It was antifreeze, your exhaust will smell kindof "sweet" and "hang" in the air longer than typical condensated exhuast. I would have a bubbling radiator resevoir, this was becuase i was getting compression gases into my water jacket. I did NOT have any water in my oil, my oil was clean as could be. Also, when i tried to burp the system, it would suck it reallylow, and then push out all the antifreeze that i would try to put back in the system. I also lost my heat after a few days of driving becuase of lack of antifreeze... This isnt what i wanted to hear... I did everything before i actually did the head gasket as i would tell you to do, change your thermostat to a lower temperature, this seems to prolong the overheating. check your water pump out. try flushing your radiator, check you fan. you had the exact problems i did, and i hope the best to you...