Dayco 89728 No Slack Automatic Belt Tensioner Assembly

The Dayco 89728 No Slack automatic belt tensioner is designed to maintain constant, optimal tension on serpentine belt drive systems. This tensioner features Dayco's patented flat spring design that provides less operating range variation compared to traditional coil spring tensioners, helping to reduce the risk of premature accessory bearing failure due to high tension when a new belt is installed.

Key Features:

• Patented flat spring design for consistent tension throughout the belt's service life
• Heavy-duty cast aluminum spring case and arm resists cracking and fatigue
• PTFE string wound within the spring dampens noise and resists abrasion
• Coated flat spring resists rust and corrosion
• Thermoplastic rubber spring slot plugs help keep contaminants out
• Rubber O-ring seals protect against dust and grime
• Zinc-coated mounting hardware resists rust
• Engineered to meet or exceed OE specifications

Dayco automatic belt tensioners are built to outperform and outlast competitive OE parts, enduring tough conditions while promoting quieter performance and extended service life. The flat spring design reduces belt noise and slippage while maintaining proper tension as the belt wears over time.