When a head bolt strips out?

to replace a stripped head bolt, you will need to remove the head. very carefully you willneed to drill out the bolt hole in the head. you can then retap a thread into the new hole and use a larger headbolt, or you can use a speedythread to replace the thread to the original size.if you are not mecahanical i would have a mechanic do this. do not let them tell you that it cannot be fixed,or you will be replacing the motor or the engine block.