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Dayco's Automatic 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 accessory bearing 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. A Teflon strip wound within the spring resists abrasion. The flat spring itself is coated to resist rust.

Other superior design features:
  • Heavy-duty cast aluminum spring case resists cracking and fatigue
  • Steel locator pin and pivot tube (where the application demands)
  • Heavy-duty cast aluminum arm offers additional strength and less distortion
  • 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
Dayco - How Quality Tensioners Are Made
TypeAutomatic, Integral
Belt TypeSerpentine
Number of Pulleys1
Pulley 1 Diameter (mm)65
Pulley 1 FlatY
Pulley 1 Width (mm)26
Alternate/OEM Part Number(s): 1128750947603, 89611FN

Warranty Information:
12 Months/12,000 Miles