Remove the auto-tensioner.
Remove the tensioner pulley.

Install the tensioner pulley in the reverse order of removal.
Install the auto-tensioner.
Exhaust Pipe and Muffler Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling.
...
Breather Line and Suction Line Inspection (Page-1)
Special Tools Required
Fuel Pressure Gauge Attachment Set 07AAJ-S6MA150
Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially
available
Vacuum/Pressure Gauge, 0-4 inHg 07 ...