Check the play of the release bearing by spinning it by hand. If there is excessive play or noise, replace the release bearing.

NOTE: The release bearing is packed with grease. Do not wash it in solvent.
Rocker Arm Assembly Removal
Remove the cylinder head cover.
Loosen the rocker arm adjusting screws (A).
Unscrew the rocker shaft mounting bolts two turns at a time in the
sequence shown.
...
Adjusting the Sound
Press the (sound) button, and
rotate
to adjust the setting.
Each time you press the button, a
sound
mode switches as follows.
When the adjustment level reaches the center, you
will ...
Manual Transmission Disassembly (M/T)
Exploded View - Clutch Housing
...