Dayco 89319 Automatic Serpentine Belt Tensioner

The Dayco 89319 No Slack Automatic Belt Tensioner is engineered to maintain consistent tension on serpentine belt drives, ensuring optimal accessory performance and extended belt life. This premium tensioner features Dayco's patented flat spring design that provides superior tension stability with minimal operating range variations, reducing the risk of belt squeal, slippage, and premature accessory bearing failure.

Key Features:

• Patented flat spring design maintains constant, precise belt tension
• Teflon strip wound within the spring resists abrasion and extends service life
• Heavy-duty cast aluminum arm provides exceptional strength and minimizes distortion
• Aluminum retainer ring locks the spring case and arm together while sealing against corrosion
• Thermoplastic rubber spring slot plug keeps out harmful contaminants
• Rubber O-ring seals against dust and grime intrusion
• Lubricated nylon pivot tube bushing and spring bushing promote quieter operation
• Zinc-coated mounting bolt resists rust and ensures concentric installation for even tension distribution

Designed as an OE replacement part, this belt tensioner meets or exceeds original equipment specifications. The aluminum construction and advanced sealing system ensure reliable performance in demanding engine compartment conditions. Sold individually and backed by Dayco's limited warranty.