Hayden 5986 Accessory Drive Belt Idler Assembly

Overview of Hayden Idler Assembly 5986 for BMW Models

The Hayden Idler Assembly 5986 is designed specifically for select BMW vehicles, including the 750iL, 850Ci, 850CSi, and 850i. This accessory drive belt idler assembly ensures proper tension and alignment of the back idler belt, contributing to the efficient operation of your vehicle's accessory drive system.

• Constructed from durable black plastic material
• Measures 4.66 inches in length with a 2.9375 inch outside diameter
• Features a 1.01 inch inside diameter and a single groove design
• Includes two mounting holes with 0.25 inch diameter for secure installation
• Compatible with 1.00 inch (25.4 mm) belt width, suitable for back idler belt type

Detailed Product Description and Specifications

The Hayden Idler Assembly 5986 is a precision-engineered component within the accessory drive belt system components category. Its black plastic construction offers a balance of strength and lightweight performance. The idler assembly has an outside diameter of approximately 2.94 inches (74.6 mm) and an inside diameter of 1.01 inches, designed to accommodate a 1.00 inch wide belt. The pulley width measures 0.94 inches (23.9 mm), ensuring proper belt tracking and tension. With two mounting holes sized at 0.25 inches in diameter, this idler assembly provides a secure fitment for the accessory drive system.

About the Hayden Idler Assembly Product Line

The Hayden Idler Assembly product line focuses on tensioners and pulleys that maintain optimal belt tension and alignment in automotive accessory drive systems. This line is engineered to meet the specific requirements of various vehicle makes and models, including BMW. The Idler Assembly 5986 is part of this line, designed to provide reliable performance and compatibility with the back idler belt type in select BMW vehicles.

Common Applications and Issues Addressed

• Maintains proper tension on the accessory drive belt to prevent slippage
• Reduces belt noise caused by misalignment or wear
• Prevents premature belt wear and extends belt life
• Ensures smooth operation of engine accessories such as alternator and power steering
• Replaces worn or damaged idler assemblies in BMW 750iL, 850Ci, 850CSi, and 850i models

Installation Notes and Tips

When installing the Hayden Idler Assembly 5986, ensure the mounting holes align precisely with the vehicle’s accessory drive bracket. Use appropriate torque specifications to secure the assembly without over-tightening. Inspect the belt for wear or damage during installation and replace if necessary. Proper alignment of the idler pulley groove with the belt is critical to avoid premature wear.

Quality Assurance and Warranty

Hayden manufactures the Idler Assembly 5986 to meet OEM standards for fit and function. The plastic material and precise dimensions ensure durability and consistent performance. While specific warranty details are not provided, Hayden products typically adhere to industry quality controls to support reliable operation in BMW 750iL, 850Ci, 850CSi, and 850i vehicles.