This 8PK multi-ribbed belt transmits power from the engine crankshaft to the drive-system accessories, including the alternator, water pump, and fan. It sits in the front-end accessory drive, routing around multiple pulleys to maintain tension across the system. A worn or glazed belt slips under load, causing undercharging, overheating, or erratic fan speed. The belt is manufactured to the original profile and rib geometry, which keeps it seated in the pulley grooves without requiring tensioner adjustment beyond the standard range. On installation, verify that the belt tracks straight across all pulleys and that the tensioner is within its working arc.