Dayco 89751 Automatic Belt Tensioner Assembly

The Dayco 89751 is an automatic accessory drive belt tensioner assembly engineered to maintain consistent serpentine belt tension across all operating conditions. Designed as a direct OE replacement, this tensioner helps extend belt life and protect accessory drive components from the wear caused by improper or fluctuating belt tension.

Key Features:

• Patented flat spring design provides less operating range variation compared to coil-spring competitors, reducing the risk of premature accessory bearing failure
• Heavy-duty cast aluminum spring case and arm resist cracking, fatigue, and distortion under high-stress conditions
• Thermoplastic rubber spring slot plugs and rubber O-ring seals keep contaminants out of internal components
• Zinc-coated mounting hardware resists rust and corrosion for long-term durability
• Steel pivot tube (on applicable designs) provides enhanced stability during operation
• Built to meet or exceed original equipment specifications for a reliable, like-new fit

Dayco is a globally recognized leader in belt drive systems and tensioner technology, trusted by OEM manufacturers and professional technicians alike. The 89751 tensioner delivers quieter performance and longer service life, making it an ideal choice for restoring proper serpentine belt system function.