Dayco 89395 Automatic Belt Tensioner Assembly

The Dayco 89395 is a heavy-duty automatic belt tensioner assembly engineered to resolve common serpentine belt issues including belt squeal, improper tracking, and accessory drive failures. This complete tensioner assembly features Dayco's patented flat spring technology that provides superior performance compared to conventional coil spring designs.

Key Features:

• Patented flat spring design provides less operating range variation throughout belt life
• Reduces risk of premature accessory bearing failure caused by excessive tension
• Minimizes belt noise, slippage, and poor performance from inadequate tension
• PTFE string wound within spring resists abrasion and dampens operational noise
• Heavy-duty cast aluminum spring case and arm resist cracking, fatigue, and distortion
• Premium thermoplastic rubber spring slot plugs and O-ring seals keep contaminants out
• Zinc-coated mounting bolts resist rust and corrosion
• 6-rib serpentine and smooth pulley design
• Steel locator pins and arm plates for enhanced durability

The Dayco No Slack tensioner automatically compensates for belt stretch and wear by maintaining constant tension throughout the belt's service life. Built to outperform and outlast OEM parts, this tensioner endures the toughest conditions while promoting quieter operation and extended component life. Cross-references to OEM part number 53030958AE and aftermarket equivalents including Gates 39120, ACDelco 39120, and Dorman 419-008.