Go to RockAuto Home Page
More Information for DAYCO 89133
Import Line Designed for Foreign Nameplate Vehicles

Dayco® No Slack™ Idler/Tensioner Pulleys

Dayco Automatic Belt Tensioner features the original flat spring design engineered to provide less operating range variations in tension. This innovative design reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed and lessens the risk of belt noise and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A PTFE strip wound within the spring resists abrasion and the flat spring is coated to resist rust.

Features include:

  • Steel locator pin (where the application demands).
  • Heavy duty cast aluminum spring case that resists cracking and fatigue.
  • Heavy duty cast aluminum arm offers additional strength and less distortion.
  • Steel pivot tube (where the application demands) provides additional strength for critical torque requirements.
  • Thermoplastic rubber spring slot plug (where applicable) helps keep out harmful contaminants.
  • Lubricated nylon pivot tube bushing and spring bushing for quieter performance.
  • Rubber “O” ring which seals against dust and grime (where applicable).
  • Zinc-coated mounting bolt that resists rust.
Bearing Inner Diameter 117
Bearing Width14
Belt TypeSerpentine
Max Belt Width06 Rib
Number of Bearings1
Pulley Outside Diameter70
Pulley Width24.5
Alternate/OEM Part Number(s): 231133, 89133FN

DAYCO Warranty Information
12 months/12,000 miles. Timing Belt Component Kits/60,000 miles, or the life of the automotive manufacturer's original recommended replacement interval.