Dorman 419-718 Accessory Drive Belt Idler Pulley - Air Conditioning

Overview of Dorman 419-718 Accessory Drive Belt Idler Pulley

The Dorman 419-718 accessory drive belt idler pulley is engineered specifically for Nissan D21 models. Constructed from durable steel and finished in black, this pulley is designed to maintain proper tension and alignment of the serpentine belt system.

• Material: Steel construction for strength and durability
• Color: Black finish for corrosion resistance
• Inside Diameter: 17 mm
• Outside Diameter: 54.2 mm and 77 mm (dual measurements for fitment)
• Width: 11 mm and 16.3 mm (dual width specifications)
• Groove Quantity: Single groove to accommodate serpentine belts
• Mounting Hole Quantity: 1 for secure installation
• Belt Type: Designed for serpentine belt systems
• Material Thickness: 6 mm for structural integrity
• Pulley Bearing Quantity: 1 bearing included
• Pulley Bearing Width: 12 mm
• Specific fitment for Nissan D21 models

Detailed Product Description

The Dorman 419-718 idler pulley is a critical component in the accessory drive belt system of Nissan D21 vehicles. Its steel construction ensures long-lasting performance under the stress of engine operation. The black finish provides resistance against rust and wear, extending the service life of the pulley. With a single groove design, it is compatible with serpentine belts, which are common in modern accessory drive systems. The pulley features precise dimensions including a 17 mm inside diameter and dual outside diameters of 54.2 mm and 77 mm, ensuring a proper fit and smooth belt tracking. The included bearing with a 12 mm width supports efficient rotation and reduces friction, contributing to quieter operation and reduced wear on the belt.

Common Applications and Issues Addressed

• Maintains proper tension and alignment of the serpentine belt
• Prevents belt slippage and premature wear
• Reduces noise caused by worn or damaged pulleys
• Replaces worn or seized idler pulleys in Nissan D21 accessory drive systems
• Helps avoid engine accessory malfunctions due to belt misalignment

Installation Notes and Tips

When installing the Dorman 419-718 idler pulley on Nissan D21 models, ensure the serpentine belt is properly routed according to the vehicle’s service manual. Verify that the mounting hole aligns correctly and torque the pulley bolt to manufacturer specifications. Since mounting hardware is not included, reuse the original fasteners or obtain appropriate replacements. Inspect the serpentine belt for wear during installation and replace if necessary to ensure optimal system performance.

Quality Assurance and Warranty

Dorman manufactures this idler pulley to meet or exceed OEM specifications for fit, form, and function. The steel material and precision bearing contribute to reliable operation within the accessory drive belt system. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship. Consult product documentation or the supplier for exact warranty terms.