I'm 95% sure my head has no issues, any shop should be able to check it out and even change the valve seals (although the head didn't smoke) for around $40-$60. What do you mean size torque wrench? I'm almost positive the head bolts are 15mm. MAKE SURE YOU USE A 6 POINT SOCKET. PREF AN IMPACT SOCKET. Grab a hellacious cheater bar, make sure you're using a decent wrench, and go to town to get it off. As far as torque specs for the head botls, I'll have to check, I have them in a book back at the place (still at work)