Dayco 89605 Drive Belt Tensioner Assembly

The Dayco 89605 Automatic Belt Tensioner is engineered to maintain constant tension on serpentine belt drive systems, ensuring optimal performance and longevity for your engine accessories. This tensioner features Dayco's patented flat spring design that provides superior consistency and reliability compared to traditional coil spring tensioners.

Key Features:

• Patented flat spring technology prevents fluctuations in tensioner body positioning under load
• Heavy-duty cast aluminum spring case and arm resist cracking, fatigue, and rust
• PTFE strip wound within the spring resists abrasion and dampens noise
• Rust-resistant coating on flat spring for extended service life
• Reduces risk of premature accessory bearing failure from excessive tension
• Minimizes belt noise, slippage, and poor accessory performance from low tension
• OE-preferred design for longer life and quieter operation

Dayco automatic belt tensioners are designed to outperform and outlast competitive aftermarket products. The innovative flat spring design ensures the tensioner footprint remains consistent under tension, reducing spring fatigue and preventing housing separation that commonly leads to premature failure. This professional-grade tensioner assembly is ideal for serpentine belt drive systems that power engine accessories including alternators, power steering pumps, air conditioning compressors, and water pumps.