Dayco 87773 HVAC Heater Hose - Heater Hose

Overview of Dayco Small I.D. Heater Hose 87773

The Dayco Small I.D. Heater Hose 87773 is designed for reliable HVAC system performance in select Ford and Mazda vehicles. Engineered with durable EPDM material, this hose ensures consistent heat transfer and resistance to automotive fluids.

• Constructed from EPDM for heat and chemical resistance
• Black color for standard OEM appearance
• 5/8 inch inside diameter on both ends for precise fit
• Includes protective sleeve for added durability
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Single inside diameter hose type
• Compatible with Ford 626, Mazda MX-6, and Ford Probe models

Detailed Product Description

The Dayco Small I.D. Heater Hose line focuses on providing high-quality HVAC heater hoses with small inside diameters suitable for specific vehicle applications. The 87773 part number features a 5/8 inch inside diameter on both ends, making it an ideal replacement hose for the heater core connections in Ford 626, Mazda MX-6, and Ford Probe models. Manufactured from EPDM, this hose offers excellent resistance to heat, ozone, and automotive fluids, ensuring long service life. The black hose includes a protective sleeve to guard against abrasion and wear, 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 HVAC system use.

Applications and Common Issues Addressed

• Replacement of cracked or leaking heater hoses in Ford 626, Mazda MX-6, and Ford Probe HVAC systems
• Resolving coolant leaks that cause insufficient cabin heating
• Preventing hose collapse or blockage that restricts coolant flow
• Addressing hose wear due to abrasion or exposure to engine heat
• Maintaining proper heater core function for consistent vehicle interior temperature

Installation Notes and Tips

• Ensure the vehicle is cool before removing the old heater hose to avoid burns
• Verify the 5/8 inch inside diameter matches the heater core and engine fittings
• Inspect hose clamps and replace if corroded or damaged
• Route the hose carefully to avoid contact with sharp edges or moving parts
• Check for leaks after installation by running the engine and monitoring the HVAC system

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 87773 to meet strict SAE specifications, including J20R3 Class D-1 and J1684 Type EC, ensuring compatibility and durability in HVAC applications. The use of EPDM material and protective sleeve enhances the hose's resistance to heat and wear. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and reliability.