Dayco 89708 No Slack Automatic Belt Tensioner

The Dayco 89708 is a premium automatic belt tensioner designed for automotive and light truck serpentine belt drive systems. Part of Dayco's No Slack product line, this tensioner is engineered to resolve common belt-related issues including belt squeal, improper tracking, and accessory component failure.

Key Features:

• Patented flat spring technology provides consistent tension throughout belt life, compensating for stretch and wear
• Reduces risk of premature accessory bearing failure from excessive tension
• Cast aluminum housing and arm construction for superior durability and crack resistance
• Smooth pulley design for optimal belt contact and reduced wear
• Steel locator pins and arm plates for enhanced strength
• PTFE string wound within spring resists abrasion and dampens noise
• Thermoplastic rubber spring slot plugs and O-ring seals keep contaminants out
• Zinc-coated mounting hardware resists rust and corrosion

Built to outperform and outlast OEM parts, this tensioner maintains constant belt tension while promoting quieter operation and extended belt life. The flat spring design offers less operating range variation compared to conventional coil spring tensioners, ensuring reliable performance under demanding conditions. Sold individually with smooth pulley.