Dayco 89684 No Slack Automatic Belt Tensioner Assembly

The Dayco 89684 No Slack automatic belt tensioner assembly is engineered to resolve common accessory belt drive issues including belt squeal, improper tracking, and accessory system failures. This tensioner features Dayco's patented flat spring technology that maintains constant tension throughout the belt's service life, compensating automatically for belt stretch and wear.

Key Features:

• Heavy-duty cast aluminum housing and arm construction resists cracking and fatigue
• Specially coated flat wire spring provides concentric internal tension for even, constant belt tension
• 5-rib serpentine pulley design
• Steel locator pins and arm plates for precise installation
• Built to OE specifications for exact fit and function
• Engineered to outperform and outlast original equipment parts

Each Dayco No Slack tensioner is designed to endure demanding conditions while promoting quieter operation and extended service life. The innovative flat spring design allows torque to be transmitted to the belt when needed, maintaining optimal belt performance across all operating conditions.