Sprockets, hydraulic tensioner, chain guide and tensioner arm
1. Check the camshaft and crankshaft sprocket teeth for excessive wear, chipping and damage. If necessary, replace sprockets with new ones.
2. Check the tensioner arm chain contact surface and guide for excessive wear and damage. If necessary, replace with new ones.
3. Check the stroke of the hydraulic tensioner plunger and the smoothness of its movement. If any defects are found, replace the tensioner assembly.
Accessory drive belt and pulleys
1. Check idler pulley for oil leaks and excessive wear and damage. If defects are found, replace with a new one.
2. Check the drive belt for excessive wear. If necessary, replace with a new one.
3. Check the pulleys for vibration while rotating. If necessary, replace the pulley with a new one.