Dayco 89070 Accessory Drive Belt Tensioner Pulley

Durable Accessory Drive Belt Tensioner Pulley for Select Vehicles

The Dayco 89070 accessory drive belt tensioner pulley is engineered to maintain optimal tension on serpentine belts in various Audi, Chevrolet, Chrysler, Dodge, Jeep, Mercedes-Benz, Ram, Saturn, and Volkswagen models. Designed with a polymer material and precise dimensions, this pulley supports reliable belt operation and vehicle performance.

• Constructed from durable polymer for long-lasting wear resistance
• Features 6 grooves compatible with serpentine belt systems
• Bearing inner diameter of 17 mm and bearing width of 14 mm for smooth rotation
• Supports a maximum belt width of 6 ribs
• Single bearing design ensures efficient tensioner function

Technical Specifications and Compatibility

The Dayco 89070 tensioner pulley measures 65.4 mm in outer diameter and 26.6 mm in width, making it suitable for accessory drive belt systems requiring precise fitment. Its 6-groove design accommodates serpentine belts commonly found in vehicles such as the Audi A6 Quattro, Chevrolet Cobalt, Chrysler Town & Country, Dodge Charger, Jeep Grand Cherokee, Mercedes-Benz ML350, Ram 1500 Classic, Saturn Ion, and Volkswagen Touareg. This part number 89070 is engineered to meet the exacting standards of these makes and models, ensuring proper belt alignment and tension.

Common Applications and Problem Resolution

• Prevents belt slippage and reduces noise caused by worn pulleys
• Maintains correct belt tension to avoid premature belt wear
• Eliminates vibration issues related to faulty tensioner pulleys
• Supports smooth operation of engine accessories like alternators and power steering pumps
• Helps avoid engine overheating by ensuring proper belt-driven cooling system function

Installation Notes and Tips

When installing the Dayco 89070 tensioner pulley, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. Use appropriate tools to relieve tension from the belt tensioner assembly before removing the old pulley. Verify the bearing rotates smoothly without resistance or noise before final assembly. It is recommended to inspect the serpentine belt for wear and replace it if necessary during installation.

Quality Assurance and Warranty Information

Dayco manufactures the 89070 accessory drive belt tensioner pulley to meet OEM specifications, using high-quality polymer materials and precision bearings. This part undergoes rigorous quality control to ensure durability and reliable performance. While specific warranty details may vary, Dayco typically offers coverage against defects in material and workmanship, providing confidence in the product’s longevity and function.