Dayco 89733 No Slack Automatic Belt Tensioner Assembly

The Dayco 89733 No Slack Automatic Belt Tensioner Assembly is engineered to maintain constant tension on serpentine belt drives, ensuring optimal performance of your engine's accessories. This premium tensioner assembly is designed to outperform and outlast competitive OE parts with its innovative flat spring technology that compensates for belt stretch and wear throughout the life of your drive belt.

Key Features:

• Heavy-duty cast aluminum spring case and arm for superior crack and fatigue resistance
• Steel locator pin and pivot tube for enhanced strength and durability
• Flat spring technology with PTFE strip wound within the spring to resist abrasion
• Rust-resistant coated flat spring for extended service life
• Lubricated nylon pivot tube bushing and spring bushing for quiet operation
• Thermoplastic rubber spring slot plug to exclude harmful contaminants
• Rubber O-ring seal to protect against dust particles
• Zinc-coated mounting bolt for corrosion resistance

This tensioner assembly is designed to resolve common belt-related issues including belt squeal, improper tracking, and accessory performance problems. The innovative flat spring design provides less operating range variation in tension, reducing the risk of premature accessory bearing failure from excessive tension when a new belt is installed, while preventing belt noise and slippage from low tension as the belt stretches over time. Backed by Dayco's reputation for quality since 1905, this tensioner assembly delivers reliable performance for daily driving conditions.