Dayco 89712 Accessory Drive Belt Tensioner Assembly

The Dayco 89712 is a complete accessory drive belt tensioner assembly engineered to maintain proper tension on serpentine belt systems in automotive and light truck applications. This precision-engineered component ensures consistent belt performance while reducing the risk of premature accessory bearing failure, belt noise, and slippage.

Key Features:

• Patented flat spring design provides consistent operating range with less variation than competitive designs
• Heavy-duty cast aluminum spring case and arm resist cracking, fatigue, and distortion
• PTFE string wound within the spring dampens noise and resists abrasion
• Corrosion-resistant coating on flat spring prevents rust formation
• Thermoplastic rubber spring slot plugs and O-ring seals keep contaminants out
• Zinc-coated mounting bolts resist corrosion
• Lubricated bearing for smooth operation and extended service life

Dayco tensioners are designed to deliver optimal performance across the entire belt life cycle, from initial installation through replacement intervals. The advanced engineering provides proper tension when a new belt is installed while maintaining adequate tension as the belt ages, ensuring reliable operation and quieter performance throughout the service life of your serpentine belt system.