Dayco 89218 No Slack Automatic Belt Tensioner Assembly

The Dayco 89218 No Slack Automatic Belt Tensioner Assembly is engineered to maintain consistent tension on serpentine belt drive systems for automotive and light truck applications. This accessory drive belt tensioner helps ensure optimal performance of critical engine accessories including alternators, power steering pumps, water pumps, and air conditioning compressors.

Key Features:

• Patented flat spring design provides less operating range variation in tension compared to conventional tensioners
• Reduces risk of premature accessory bearing failure from excessive tension when new belts are installed
• Minimizes belt squeal, slippage, and poor accessory performance caused by low tension as belts stretch and wear
• PTFE strip wound within the spring resists abrasion and prevents corrosion
• Counter-clockwise rotation direction for proper belt routing
• Single pulley design with 76mm diameter and 31mm width
• Lubricated bearings and high-temperature seals for extended service life
• Smoother surfaces and tighter dimensional tolerances prolong belt life

This tensioner assembly is designed as a direct replacement for multiple OEM and aftermarket part numbers including Gates 38132, Gates 38386, ACDelco 38132, ACDelco 38386, Dorman 419-204, and numerous Ford OEM numbers. Dayco has been a global leader in automotive belt systems since 1905, delivering proven reliability and performance for demanding engine drive applications.