Dayco 89715 Automatic Belt Tensioner Assembly

The Dayco 89715 is a hydraulic-type automatic accessory drive belt tensioner assembly designed for automotive and light truck applications. This complete assembly includes the tensioner, mounting bracket, and smooth pulley, fully assembled and ready for installation.

Key Features:

• Hydraulic shock-type design maintains constant tension throughout belt life
• Proprietary flat spring technology compensates for belt stretch and wear while reducing tension variations
• Cast aluminum housing and arm construction for superior durability and resistance to cracking
• Steel locator pins and arm plates provide additional strength for critical torque requirements
• Rust-resistant components with PTFE-coated spring for extended service life
• Smooth pulley design ensures proper belt routing and reduces vibration
• Clockwise rotation direction

This tensioner is engineered to eliminate common serpentine belt problems including belt squeal, improper tracking, and accessory performance issues. The hydraulic design promotes quieter operation while resisting the harsh conditions of the engine bay. By maintaining proper belt tension, this assembly helps protect accessory bearings from premature failure caused by excessive tension when new belts are installed, while preventing belt noise and slippage as belts age.

OEM Cross-References: Honda 31170-5G0-A01, Honda 31170-5G0-A02, Gates 39331