Dayco 89396 No Slack Automatic Belt Tensioner Assembly

The Dayco 89396 No Slack Automatic Belt Tensioner Assembly is engineered to eliminate belt squeal, improper tracking, and accessory performance issues in serpentine belt drive systems. This precision-designed tensioner maintains constant belt tension throughout the life of your belt, ensuring optimal performance of all engine accessories.

Patented Flat Spring Technology:

Unlike conventional tensioners, the Dayco 89396 features a patented flat spring design that provides less operating range variation in tension. This innovative technology allows the tensioner to increase torque transmission to the belt when needed, automatically compensating for belt stretch and wear. The result is reduced risk of premature accessory bearing failure from excessive tension when a new belt is installed, and elimination of belt noise and slippage caused by low tension as the belt ages.

Heavy-Duty Construction:

• Cast aluminum spring case and arm resist cracking, rust, and fatigue
• Steel locator pins for precise installation alignment
• Reinforced arm plates for enhanced durability
• PTFE strip wound within the spring resists abrasion and dampens noise
• Corrosion-resistant coating on flat spring extends service life

What's Included:

Complete tensioner assembly with integrated pulley, ready for installation. This is a direct-fit replacement designed to meet or exceed OEM specifications for long-lasting, reliable performance in demanding automotive applications.