Dayco 89379 Timing Belt Tensioner Assembly

The Dayco 89379 No Slack Automatic Belt Tensioner is engineered to maintain constant tension on serpentine belt drives, ensuring optimal performance and longevity of your engine's accessory system. This precision-engineered tensioner features Dayco's patented flat spring design that provides minimal operating range variations in tension, significantly reducing the risk of premature accessory bearing failure while preventing belt squeal, slippage, and poor accessory performance.

Key Features:

• Patented flat spring design maintains consistent tension with minimal variation
• Teflon strip wound within the spring resists abrasion and wear
• Heavy-duty cast aluminum arm provides superior strength and reduces distortion
• Aluminum retainer ring locks spring case and arm together while sealing against corrosion
• Thermoplastic rubber spring slot plug keeps out harmful contaminants
• Lubricated nylon pivot tube bushing and spring bushing promote quieter operation
• Rubber O-ring seals against dust and grime intrusion
• Zinc-coated mounting bolt resists rust and provides concentric mounting for even tension distribution
• OE replacement quality for reliable fit and function

This tensioner is designed for truck applications and is sold individually. Backed by Dayco's limited warranty, this component delivers the quality and reliability expected from a leading manufacturer of automotive belt drive systems.