Remove the drive belt.
(Refer to Timing System - "Drive Belt")
Remove the idler(A).
Tightening torque :
53.9 ~ 63.7 N.m (5.5 ~ 6.5 kgf.m, 39.7 ~ 47.0 lb-ft)
Check the idler. if it is grease leak or abnormal rotation, replace the idler.
Install in the reverse order of removal.