More Information for DAYCO 89399
{Alternate Inventory Numbers: 89399FN}
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DAYCO 89399  
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DAYCO 89399 Specifications
Belt TypeSerpentine
DirectionCounter Clock Wise
Number of Pulleys1
Pulley 1 Diameter70 mm
Pulley 1 FlatY
Pulley 1 Width26 mm

Dayco's belt tensioner features a patented "flat spring" design that's engineered to provide less operating range variations in tension. This reduces the risk of premature failure due to high tension when a new belt is installed. It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear.

Features & Benefits:
  • Patented flat spring provides less operating range variations in tension for longer life and quieter performance
  • Heavy-duty cast aluminum offers additional strength and less fatigue or distortion
  • Steel locator pin and pivot tube (where the application demands) provide additional support for critical torque requirements
  • Thermoplastic rubber "spring slot plug" keeps out harmful contaminants
  • Zinc coated mounting bolt (where included) resists rust, and is concentric for a more even degree of constant tension
Service Tip: Always replace belts and tensioners together. Old tensioners will reduce a belt's lifespan, and can lead to issues such as overheating, a dead battery, diminished power steering, or poor air conditioning performance.

Features and Benefits of Dayco Tensioners

OEM / Interchange Numbers: 11287530314

Warranty Information:
12 Months/12,000 Miles