Ok so im new to this post and like what im reading. But I have a question??? I just bought an 98 outback with 2.5 and im sure the hg is bad, so I wanted to try the cheap way first just to see if it would help, in doing this.....i flushed my rad, twice....both times with the thermostat out car didnt get hot???? put in the blue devil head sealer car ran for 1 1/2 hr with out over heating...I drain it, fill it with coolent, put in a new thermostat with in 6 mins its HOT...I DON'T GET IT....any words good bad or ugly for me