Dayco 89720 Accessory Drive Belt Tensioner Assembly

Overview of Dayco Accessory Drive Belt Tensioner Assembly 89720

The Dayco 89720 accessory drive belt tensioner assembly is designed for Nissan Altima and Rogue models. This automatic tensioner supports serpentine belt systems, ensuring proper belt tension and smooth operation of engine accessories.

• Compatible with Nissan Altima and Rogue vehicles
• Automatic tensioner type for consistent belt tension
• Counter clockwise direction operation
• Single pulley design with a 70mm diameter
• Pulley width of 25mm with a flat surface

Technical Details and Specifications

This Dayco accessory drive belt tensioner assembly (part number 89720) features a serpentine belt type designed to maintain optimal tension automatically. The tensioner operates in a counter clockwise direction and includes one pulley with a diameter of 70mm and a width of 25mm. The pulley surface is flat, which helps reduce belt wear and ensures proper belt tracking. This assembly is engineered to fit specific Nissan models, including the Altima and Rogue, providing reliable performance in the vehicle's accessory drive system.

Applications and Problem Resolution

This tensioner assembly is used to maintain the correct tension on the serpentine belt, which drives multiple engine accessories such as the alternator, power steering pump, and air conditioning compressor. Installing the Dayco 89720 can help address issues such as:

• Excessive belt slack causing slipping or noise
• Uneven belt wear or premature belt failure
• Loss of accessory function due to improper belt tension
• Vibration or misalignment in the accessory drive system
• Difficulty maintaining consistent belt tension during engine operation

Installation Notes and Tips

When installing the Dayco 89720 tensioner assembly, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. The automatic tensioner should be installed with the pulley rotating counter clockwise as specified. Verify pulley alignment and belt tension after installation to prevent premature wear. It is recommended to inspect the belt and other drive components during replacement to maintain overall system reliability.

Quality Assurance and Warranty

Dayco manufactures this accessory drive belt tensioner assembly to meet or exceed OEM specifications for Nissan Altima and Rogue models. The part number 89720 undergoes rigorous quality control to ensure durability and consistent performance. While specific warranty details may vary, Dayco typically offers a limited warranty covering defects in materials and workmanship, providing confidence in the product’s reliability.