Dayco 89743 Automatic Belt Tensioner Assembly

The Dayco 89743 is an automatic belt tensioner assembly designed to maintain constant tension on serpentine belt drive systems. Built to outperform and outlast competitive OE parts, this tensioner ensures reliable performance in demanding automotive applications.

Key Features:

• Patented flat spring design provides less operating range variation compared to traditional coil spring tensioners
• Heavy-duty cast aluminum spring case and arm resists cracking, fatigue, and distortion
• Reduces risk of premature accessory bearing failure from excessive tension
• Minimizes belt noise, slippage, and poor performance caused by improper tension
• Premium quality pulley with lifetime lubricated bearings for long-lasting service
• Zinc-coated mounting hardware resists rust and corrosion
• Rubber O-ring seals and thermoplastic plugs keep contaminants out

Dayco's engineering expertise delivers quieter operation and extended service life for serpentine belt drive systems. The flat spring design continuously adapts to operating conditions, optimizing belt tension across all engine loads and temperatures. Premium construction materials and precision manufacturing ensure dependable performance mile after mile.