A4712020019
Water Pump Belt Tensioner Pulley (Ribbed)
Detroit Diesel

This ribbed belt tensioner pulley is designed to maintain proper tension on the serpentine belt, essential for the reliable operation of various engine accessories. With a diameter of approximately 3.35 inches and a width of 1.26 inches, the pulley features an 8-rib groove configuration to match the belt profile precisely. Made from steel, it offers robust durability to withstand the stresses of continuous operation. The tensioner pulley’s function is to absorb belt slack and compensate for wear, preventing slippage and ensuring consistent power transfer. Proper tensioning extends belt life and reduces the risk of accessory drive failure. Its strategic location and high-quality construction contribute significantly to engine efficiency and longevity. Source One Parts Center provides this component as part of their trusted inventory, recognizing its vital role in maintaining engine accessory systems and preventing costly downtime.