Dayco 89615 Automatic Belt Tensioner Assembly

The Dayco 89615 Automatic Belt Tensioner is engineered to maintain constant, consistent tension on serpentine belt drives throughout the life of the belt. This tensioner assembly features Dayco's patented flat wire spring design that allows internal tension to be concentric, delivering more even and constant tension compared to conventional tensioners.

Key Features:

• Heavy-duty cast aluminum spring case resists cracking, corrosion, and fatigue
• Flat wire spring construction with special coating to resist rust and abrasion
• PTFE strip wound within spring provides superior wear resistance
• Reduces risk of premature accessory bearing failure from high tension
• Minimizes belt noise, slippage, and poor accessory performance from low tension
• Patented Deflected Arm Plate dampens arm movement and extends tensioner life
• Nylon pivot bushing maintains proper alignment and internal component contact
• Metallic locator pin for accurate installation positioning

This tensioner assembly provides quieter performance and longer service life than standard aftermarket replacements. The advanced engineering delivers less operating range variation in tension, preventing belt squeal while protecting critical engine accessories including alternators, air conditioning compressors, power steering pumps, and water pumps.