Dayco 89254 No Slack Automatic Belt Tensioner Assembly

The Dayco 89254 No Slack Automatic Belt Tensioner is engineered to maintain constant tension on serpentine belt drives, eliminating belt squeal, improper tracking, and accessory failures. This premium tensioner features Dayco's patented flat spring technology that provides less operating range variation compared to conventional designs, reducing the risk of premature accessory bearing failure from excessive tension while preventing belt noise and slippage from insufficient tension.

Key Features:

• Patented flat spring design increases torque transmission and compensates for belt stretch and wear
• Heavy-duty cast aluminum spring case and arm resists cracking, fatigue, and distortion
• PTFE string wound within spring resists abrasion and dampens noise for quieter operation
• Steel locator pins and arm plates provide enhanced stability and durability
• Premium thermoplastic rubber spring slot plugs and O-ring seals keep contaminants out
• Zinc-coated mounting bolts resist rust and corrosion
• Lubricated bearings with high-temperature seals ensure peak performance

Designed to outperform and outlast OEM parts, this automatic belt tensioner maintains optimal tension throughout the life of your belt, ensuring reliable operation of air conditioning compressors, alternators, power steering pumps, water pumps, and other critical engine accessories. Each tensioner is built with superior resistance to dirt, salt, chemicals, and harsh under-hood conditions.