Dayco 89736 Automatic Serpentine Belt Tensioner Assembly

The Dayco 89736 Automatic Belt Tensioner Assembly is engineered to maintain constant tension on serpentine belt drives, ensuring optimal performance of engine accessories. This tensioner features Dayco's patented flat spring design that provides superior tension consistency throughout the belt's service life, reducing operating range variations compared to conventional coil spring tensioners.

Key Features:

• Flat spring design reduces risk of premature accessory bearing failure due to excessive tension
• PTFE strip wound within spring resists abrasion and extends service life
• Heavy-duty cast aluminum spring case resists cracking and fatigue
• Steel pivot tube provides additional strength for critical torque requirements
• Rust-resistant coating on flat spring for extended durability
• Minimizes belt noise, slippage, and poor accessory performance as belt ages

This tensioner assembly helps prevent common serpentine belt system issues including belt squeal, improper tracking, and accessory failure. The innovative design compensates for belt stretch and wear while maintaining proper tension, promoting quieter operation and longer component life.

Cross-Reference Part Numbers: 2335362, 39456, 49865, 780376, 999914A, B20118