Dayco 89631 Automatic Belt Tensioner Assembly with Pulley

The Dayco 89631 Automatic Belt Tensioner Assembly is engineered to maintain constant tension on serpentine belt drives, eliminating belt noise and reducing slippage for optimal accessory performance. This complete assembly features Dayco's original, patented flat spring design that provides less operating range variation compared to traditional coil spring tensioners, reducing the risk of premature accessory bearing failure due to high tension while preventing belt noise and slippage from low tension.

Key Features:

• Patented flat spring design with PTFE string wound within the spring to resist abrasion and dampen noise
• Heavy-duty cast aluminum spring case and arm resists cracking, fatigue, and distortion for enhanced durability
• Premium thermoplastic rubber spring slot plugs and rubber O-ring seals keep contaminants out
• Steel pivot tube on specific designs provides enhanced stability
• Zinc-coated mounting bolts resist rust and corrosion
• 70mm pulley diameter with flat design and 26mm width
• Clockwise rotation, automatic tensioner type

OEM Cross-Reference: Replaces Ford BR3E-6B209-HA, BR3E-6B209-HC, BR3Z-6B209-H, BR3Z-6B209-B; Motorcraft BT100, BT103; Duralast 305631; Gates 39298; AC Delco 39298; Continental Elite 49821; Bando 780207; Litens 999830A.

Dayco has been a global leader in automotive belt drive systems since 1905, delivering innovative solutions that endure the toughest conditions while promoting quieter performance and longer component life.