ok, nerih has said the worse case scenario there, but somtimes its not so bad...my head was fine after my h/g went, but it is true that vr6's tend to warp their heads when the h/g goes. get all the tests done first to confirm it is h/g. if you have to drive it to a garage to get the tests done keep a close eye on your temp guage, second it goes upto 100 turn the car off.