How do you tightend a fan belt?

To tighten a fan belt, first, ensure the engine is off and cool for safety. Locate the tension adjustment mechanism, which may be a tensioner pulley or an adjustment bolt on the alternator or other component. Loosen the bolts slightly, adjust the belt tension by moving the component, and then retighten the bolts securely. Finally, check the tension by pressing down on the belt; it should have a little give but not feel overly loose.