Dorman 300-857 Alternator Pulley

Durable Alternator Pulley for Hyundai and Kia Vehicles

The Dorman 300-857 alternator pulley is designed to provide reliable performance for select Hyundai and Kia models. Featuring a bolt-on attachment and a serpentine design, this pulley ensures proper belt alignment and smooth operation in your vehicle's charging system.

• Finish: Black for corrosion resistance
• Attachment Type: Bolt-on for secure installation
• Outside Diameter: 2.52 inches
• Type: Serpentine pulley compatible with serpentine belts
• Contact Surface Material: Steel for durability
• Bore Size: 0.57 inches
• Flanged End: No
• Installation Hardware: Not included
• Package Contents: 1 alternator clutch pulley

Technical Details and Compatibility

This Dorman alternator pulley (part number 300-857) is engineered to meet the specifications required for proper alternator function in Hyundai and Kia vehicles. Its steel contact surface and black finish provide resistance to wear and corrosion, helping maintain consistent belt tension and alignment. The bolt-on attachment type allows for straightforward replacement without the need for specialized tools. The pulley’s 2.52-inch outside diameter and 0.57-inch bore size are designed to match original equipment dimensions, ensuring compatibility and reliable performance.

Compatible Hyundai and Kia Models

This alternator pulley is compatible with the following vehicles:

• Hyundai Forte, Forte5, Forte Koup
• Hyundai Sonata
• Kia Optima
• Kia Rondo
• Kia Sportage
• Kia Tucson

Common Issues Addressed by the Alternator Pulley

• Alternator belt slippage causing charging system inefficiency
• Noise or squealing from worn or damaged pulley surfaces
• Misalignment of serpentine belt leading to premature belt wear
• Failure of the alternator clutch pulley affecting belt tension
• Corrosion or wear compromising pulley performance

Installation Notes and Tips

Installation of the Dorman 300-857 alternator pulley requires removal of the old pulley and securing the new one using the bolt-on attachment method. Note that installation hardware is not included, so retain original bolts or acquire appropriate replacements. Ensure the serpentine belt is properly aligned and tensioned after installation to avoid premature wear or noise. It is recommended to inspect the belt and related components during replacement.

Quality Assurance and Warranty

Dorman alternator pulleys are manufactured to meet or exceed OEM standards for fit, form, and function. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. This ensures that the 300-857 alternator pulley provides dependable service when installed according to manufacturer guidelines.