Remove the drive belt.
(Refer to Timing System - "Dreve Belt")
Remove the drive belt idler (A).
Tightening torque :
42.2 ~ 53.9 N.m (4.3 ~ 5.5 kgf.m, 31.1 ~ 39.8 lb-ft)
Check the idler. if it is grease leak or abnormal rotation, replace the idler.
Install in the reverse order of removal.