Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head. (Photograph by Chris ...

A bloody hand streaks through the air, discharging the offending 1/2-inch-drive ratchet into an excursion through the garage wall. The only thing more piercing than the pain is the howl of agony that ...