Automatic Belt Tensioners, No Slack 89421

positive OEM
Dayco
Part# 89421
note
Automatic Belt Tensioners, No Slack 89421 - Dayco
Automatic serpentine belt tensioner maintaining no slack in cooling systems.
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Description

The Dayco Automatic Belt Tensioner No Slack (DCO 89421) is a mechanical component designed to maintain consistent tension on serpentine belts in engine cooling systems. It automatically adjusts to eliminate slack, ensuring optimal belt performance and reducing wear in heavy-duty vehicle applications.

Key Specifications

  • Application: Cooling system belt tensioning
  • Function: Maintains serpentine belt tension automatically
  • Compatibility: Heavy-duty trucks, commercial vehicles
  • Construction: Metal housing, steel pulley
  • Features: Counterclockwise rotation, single non-grooved pulley, pulley diameter 2.91 in, pulley width 1.82 in
  • Quality: Aftermarket Dayco part

Shipping Info

Next Day Air services are available for In Stock items. Our shipping cutoff time is Monday - Friday 4:30pm Eastern Standard Time (EST). 

 

For more shipping information, please see our Shipping & Delivery page.

More Information

Current Part# 89421
Type OEM
Part# variations 89421 DYC,
89421DYC,
DCO 89421,
DCO89421
Manufacturer Dayco
Warranty Standard Manufactures