Tensioner Pulley Replacement

Remove the auto-tensioner (see DRIVE BELT AUTO-TENSIONER REPLACEMENT ).
Secure the auto-tensioner in a vise with soft jaws. To prevent damage to the tensioner, always use soft jaws or equivalent materials between the tensioner and the vise.

Fig 1: Identifying Auto-Tensioner
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the pulley bolt (left-hand threads), and remove the tensioner pulley.

Fig 2: Pulley Bolt And Tensioner Pulley With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the new tensioner pulley in the reverse order of removal.