[CREWZIN]

Don't know if all torque wrenches are the same but most have at least 2 different types of measurements ie: foot pounds / KPS-KGS. The tip/bottom of the wrench tightens or holds the setting, unloosen that first, then start turning the handle until the handle top is level with the marked indicator on the bar at 13 foot pounds. Tighten down the tip of the bar to lock in the setting. At least that's how mine works. [:I] 13 foot pounds is not much, don't over do it and make sure you use Anti-Seize Lubricant on the plug threads.