if they where only Tq to 17ftp you could would not even run,why do you think your headgasket is blown?i would have someone look at it first to check the compression and all maybe they where just not tightened do to 70Lb they should be and when it warms up may have lil leak honda motors are not known for warping im sure it could happen but is very rare,i and many have beat the hell out of some and stll nothing.try finding someone who knows hondas"maybe dealers" to find out what is wrong with your car