Dayco 3PK784EE Serpentine Belt - Water Pump

Dayco 3PK784EE Serpentine Belt Overview

The Dayco 3PK784EE is an EPDM serpentine belt for accessory drive systems that use a 3-rib K-section profile. It is listed for the water pump position on select Hyundai Sonata and Kia Optima applications, including models that require an elastic self-tensioning belt and an installation tool.

Built to SAE J1459 standards, this black EPDM4 belt is specified with a 30.866-inch effective length and 30.1-inch free length for the listed applications. The Dayco 3PK784EE is also identified as superseding E030301.

Key Features

• Brand: Dayco
• Part number: 3PK784EE
• EPDM4 construction for accessory drive belt service
• 3-rib K-section design with straight rib profile
• Black finish
• Effective length: 784 mm / 30.866 in
• Free length: 764.540 mm / 30.1 in
• Meets SAE J1459 standards
• Water pump application for select Hyundai Sonata and Kia Optima models

Detailed Description

Dayco 3PK784EE is a serpentine belt engineered for the accessory drive belt system on specific 2011-2016 Kia Optima and 2011-2015 Hyundai Sonata water pump applications. Its elastic self-tensioning design is used where the belt is installed without a conventional tensioner, and the listed fitment notes specify that an installation tool is required. For buyers searching for a 2011-2016 Kia Optima water pump serpentine belt or a 2011-2015 Hyundai Sonata water pump accessory belt, this part number provides the exact size and rib configuration needed for the application.

The EPDM4 material supports belt service in demanding underhood temperatures, with a listed operating range from -45 to 212 degrees Fahrenheit. The 3-rib straight rib profile and K-section cross section match the specified drive layout, while the 784 mm effective length helps maintain proper routing and engagement on the water pump drive. If you are replacing a worn Dayco 3PK784EE belt or cross-checking the 3PK784EE part number for Hyundai Sonata or Kia Optima service, verify the vehicle year and water pump configuration before ordering.

What This Belt Helps Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or rib wear on the existing belt
• Loss of proper belt tension on elastic self-tensioning systems
• Water pump drive service on the listed Hyundai Sonata and Kia Optima applications
• Incorrect belt length or rib count during replacement

Installation Notes and Tips

• Compatible with 2011-2016 Kia Optima, water pump.
• Compatible with 2011-2015 Hyundai Sonata, water pump.
• Fitment notes specify an elastic self-tensioning belt.
• An installation tool is required for the listed applications.
• Confirm rib count, length, and routing against the removed belt before installation.

Quality Assurance

This Dayco belt is manufactured to SAE J1459 standards and uses EPDM4 material for the specified accessory drive application. The part number 3PK784EE supersedes E030301 for the listed fitment.