Dayco 89701 No Slack Automatic Belt Tensioner Assembly

The Dayco 89701 No Slack Automatic Belt Tensioner Assembly is engineered to resolve common belt system issues including belt squeal, improper tracking, and accessory component failures. This heavy-duty tensioner assembly features advanced flat spring technology that automatically increases torque transmission to the belt when needed, compensating for stretch and wear while maintaining constant tension throughout the belt's service life.

Key Features:

• Cast aluminum housing and arm construction for maximum durability and resistance to cracking and fatigue
• Steel locator pins and arm plates ensure precise positioning and long-term reliability
• Smooth pulley design for optimal belt routing and reduced vibration
• Lifetime-lubricated bearings with high-temperature seals for peak performance
• Superior resistance to dirt, salt, chemicals, and harsh under-hood conditions
• Smoother surfaces and tighter dimensional tolerances extend belt service life

Designed to meet or exceed OEM specifications, this tensioner assembly assists critical engine accessories including air conditioning compressors, alternators, power steering pumps, and water pumps. The Dayco 89701 provides an exact OE replacement solution that delivers reduced wear, friction, vibration, and harshness for reliable long-term performance.