After checking the fastening strength, absence of cracks, wear and tension of the auxiliary drive belt, replace the belt if necessary.
Inspect, Check: The following illustrations show the various stages of belt wear to help you decide when to replace the belt. The condition of the belt ribs is best assessed when the belt is installed on one of the large pulleys in the accessory drive system.
A - New belt
B - Low wear belt: few cracks, slight wear of ribs and grooves. Replacement is not necessary.
C - Belt with high wear rate: significant cracks of approx. 30 mm. Must be replaced before pieces of material start to come off from the belt base.
D - Belt failure: The rib material is torn away from the base. Replace the belt immediately.
(The text of the article was obtained from the website: «ChevyMan.ru»)