Dayco 87917 HVAC Heater Hose - Heater To Thermostat

Overview of Dayco Small I.D. Heater Hose 87917

The Dayco Small I.D. Heater Hose 87917 is designed for reliable HVAC system performance in select Ford, Lincoln, and Mercury vehicles. Engineered with durable EPDM material, this hose supports efficient heating and coolant flow for models like the Fusion, Milan, and Zephyr.

• Constructed from high-quality EPDM for heat and chemical resistance
• Dual inside diameter hose with 5/8 inch and 3/4 inch ends
• Black color with protective sleeve for added durability
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Compatible with Ford Fusion, Lincoln Milan, and Mercury Zephyr HVAC systems

Detailed Product Description

The Dayco Small I.D. Heater Hose 87917 is a dual inside diameter hose designed to connect different sized fittings within the HVAC system. The hose features a 5/8 inch inside diameter on one end and a 3/4 inch inside diameter on the other, with corresponding outside diameters of 1 inch and 1 3/32 inches respectively. Made from EPDM (ethylene propylene diene monomer), this hose offers excellent resistance to heat, ozone, and coolant chemicals, ensuring long service life under typical engine compartment conditions.

This hose includes a protective sleeve to guard against abrasion and external damage, although it does not contain a heat shield. It complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive heater hose applications. The hose length is 26 inches, providing adequate reach for HVAC heater core connections in compatible vehicles.

About the Small I.D. Heater Hose Product Line

The Dayco Small I.D. Heater Hose line focuses on providing hoses with varying inside diameters to accommodate different HVAC system configurations. This product line is engineered to meet stringent SAE specifications, ensuring compatibility and durability for heating and cooling system repairs. The 87917 part is a representative example, offering a dual inside diameter design with protective features tailored for Ford, Lincoln, and Mercury models.

Common Applications and Issues Addressed

• Replacement of worn or cracked heater hoses in Ford Fusion, Lincoln Milan, and Mercury Zephyr
• Resolving coolant leaks within the HVAC heater core circuit
• Addressing hose swelling or softening due to heat exposure
• Improving coolant flow efficiency with properly sized hose diameters
• Preventing abrasion damage with the included protective sleeve

Installation Notes and Tips

• Verify hose diameters and length before installation to ensure proper fit
• Inspect hose connections and clamps for corrosion or damage during replacement
• Use appropriate coolant compatible with EPDM hoses to avoid premature degradation
• Ensure hose routing avoids sharp bends or contact with hot engine components
• Replace clamps if they show signs of wear to maintain secure connections

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 87917 to meet SAE automotive standards, ensuring consistent quality and performance. The EPDM material and protective sleeve contribute to durability under typical operating conditions. While specific warranty details are not provided, Dayco products generally adhere to industry quality controls and are suitable for professional HVAC system repairs on compatible Ford, Lincoln, and Mercury vehicles.