Dayco 5080790 Serpentine Belt

Dayco 5080790 Serpentine Belt Overview

The Dayco 5080790 serpentine belt is an 8-rib accessory drive belt built with EPDM and aramid reinforcement for dependable operation in demanding engine bays. It measures 78.94 inches effective length and 79.57 inches outside circumference, with a K-section cross section and straight rib profile for consistent belt tracking.

Compatible With Cummins, Freightliner, Navistar, John Deere, Daimler, and related heavy-duty accessory drive applications, this belt is specified for vehicles and equipment that require an 8-rib K-section belt. The Dayco 5080790 is also referenced by OE and aftermarket part numbers used across commercial and industrial platforms.

Key Features

• Part number: 5080790
• EPDM construction with aramid reinforcement for durability
• 8-rib design with straight rib profile
• K-section cross section for accessory drive belt systems
• Top width: 1.10 in.
• Effective length: 78.94 in. (2005.08 mm)
• Outside circumference: 79.57 in. (2021.08 mm)
• Operating temperature range: -45°F to 212°F
• Meets SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5080790 is a serpentine belt engineered for accessory drive belt system service where stable rib engagement and temperature resistance matter. The EPDM rubber compound helps the belt handle heat cycling, while aramid reinforcement adds tensile support for long-term use in heavy-duty and industrial environments. With its 8-rib K-section profile, this belt is built for applications that call for precise belt routing and reliable power transfer to driven accessories.

This part cross-references Gates K080790 for the same application. It is also associated with Cummins, Freightliner, Navistar, and John Deere part numbers used on select engine and equipment platforms. If you are searching for a Dayco 5080790 serpentine belt for Cummins, Freightliner, or John Deere equipment, verify belt length, rib count, and section before ordering.

What This Belt Helps Address

• Squealing or slipping caused by a worn accessory drive belt
• Cracking, glazing, or rib wear on the existing serpentine belt
• Loss of accessory drive consistency from belt stretch or fatigue
• Heat-related belt deterioration in high-temperature engine compartments
• Incorrect belt fitment when replacing an 8-rib K-section belt

Installation Notes and Tips

Confirm the required rib count, effective length, and cross section against the original belt before installation. Inspect pulleys, tensioners, and idlers for wear or misalignment, since these conditions can shorten belt life and affect tracking. For vehicle-specific searches, confirm the application on Cummins, Freightliner, Navistar, or John Deere equipment using the original part number and belt dimensions.

Fits select Cummins, Freightliner, Navistar, John Deere, and Daimler applications that specify an 8-rib K-section serpentine belt. Fits 2006-2011 Honda Civic is not applicable to this part; use the listed heavy-duty and industrial references instead.

Quality Assurance

Dayco manufactures accessory drive components to published dimensional and material specifications, and this belt is listed to SAE J1459 and SAE J2432 standards. The EPDM and aramid-reinforced construction supports consistent performance in the stated operating temperature range.