Dayco 89180 No Slack Serpentine Drive Belt Idler Pulley

The Dayco 89180 No Slack Idler Pulley is a premium accessory drive belt idler pulley engineered to maintain optimal tension and performance in serpentine belt systems. Part of Dayco's renowned No Slack series, this pulley is designed to meet or exceed OEM specifications while providing superior durability and reliability.

Key Features:

• Durable steel construction with black finish for long-lasting performance
• 7-rib serpentine groove design ensures maximum belt contact and smooth operation
• Lifetime-lubricated dual bearings (10.3mm inner diameter, 26mm width) eliminate maintenance needs
• High-temperature seals protect bearings from dirt, salt, chemicals, and under-hood contaminants
• Tighter dimensional tolerances reduce vibration and extend belt life
• Smoother pulley surfaces minimize friction and wear on serpentine belts

Dayco's No Slack idler pulleys undergo over 2,500 hours of design, development, and testing to ensure peak performance. Each pulley features advanced engineering with 3D computer-aided design for maximum structural integrity. This replacement idler pulley provides exact OE fitment and helps maintain proper tension on alternators, air conditioning compressors, power steering pumps, and other critical engine accessories.

Cross-Reference Numbers: Replaces Toyota 16603-28020, Duralast 231180, Gates 36472, ACDelco 36472, NAPA 36472, Continental 50048