How do you change fan belts on 3ltr hiace diesel?

To change the fan belt on a 3-liter Hiace diesel, first ensure the engine is off and cool. Remove any components obstructing access to the belt, then locate the tensioner pulley and loosen it to relieve tension on the belt. Carefully remove the old belt and install the new one, ensuring it follows the correct routing. Finally, re-tighten the tensioner and reassemble any components you removed.