Dayco 87790 HVAC Heater Hose - Engine To Heater

Reliable HVAC Heater Hose for Ford Super Duty and Excursion

The Dayco Small I.D. Heater Hose 87790 is designed to provide dependable performance in your Ford Excursion, F-250 Super Duty, and F-350 Super Duty HVAC systems. Engineered with durable EPDM material, this hose ensures consistent heat transfer and resistance to automotive fluids.

• Constructed from high-quality EPDM for heat and chemical resistance
• Black color for standard OEM appearance
• 5/8 inch inside diameter on both ends for precise fitment
• Single inside diameter hose type for straightforward installation
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• 27 inches trunk height for proper routing in HVAC systems

About the Dayco Small I.D. Heater Hose Product Line

The Small I.D. Heater Hose line by Dayco focuses on delivering hoses with smaller inside diameters tailored for specific HVAC applications. This product line emphasizes compatibility with OEM standards and durability under typical engine bay conditions. The 87790 part number is part of this line, ensuring it meets the precise requirements for Ford heavy-duty trucks and SUVs.

Detailed Product Description

The Dayco 87790 heater hose is manufactured from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids, making it suitable for HVAC heater core connections. Both ends of the hose have a 5/8 inch inside diameter, providing a consistent and secure fit for Ford Excursion, F-250 Super Duty, and F-350 Super Duty models. This single inside diameter hose does not include a heat shield or protective sleeve, which is typical for this type of HVAC hose. It complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for heater hoses.

Common Applications and Issues Addressed

• Replacement of worn or cracked heater hoses in Ford Excursion and Super Duty trucks
• Resolving coolant leaks in HVAC heater core connections
• Maintaining proper coolant flow to prevent heater core failure
• Addressing hose degradation due to heat and chemical exposure
• Ensuring reliable HVAC system performance during cold weather operation

Installation Notes and Tips

When installing the Dayco 87790 heater hose, ensure the hose routing matches the original OEM path to avoid kinks or interference with other engine components. Verify that the 5/8 inch inside diameter matches the heater core and fitting connections on your Ford Excursion or Super Duty model. Use appropriate clamps to secure the hose ends firmly, preventing leaks. Inspect surrounding components for wear or damage during replacement to maintain overall HVAC system integrity.

Quality Assurance and Warranty

Dayco manufactures the 87790 heater hose to meet SAE specifications, ensuring consistent quality and durability. While specific warranty details are not provided, Dayco products typically adhere to industry standards for reliability in automotive HVAC applications.