Dayco 88404 HVAC Heater Hose - Heater Outlet

Overview of Dayco Small I.D. Heater Hose 88404

The Dayco Small I.D. Heater Hose 88404 is designed specifically for HVAC systems in select INFINITI and Nissan vehicles. Engineered with durable EPDM material and a protective sleeve, this hose ensures reliable heater core performance in your Pathfinder or QX4.

• Constructed from high-quality EPDM for heat and chemical resistance
• Black color with 3/4 inch inside diameter on both ends
• Single I.D. hose type with protective sleeve included
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Compatible with INFINITI QX4 and Nissan Pathfinder models

Dayco Small I.D. Heater Hose Product Line Details

The Small I.D. Heater Hose line by Dayco focuses on delivering precise fitment and durability for HVAC applications requiring smaller inside diameter hoses. This product line emphasizes compliance with SAE standards such as J20R3 Class D-1 and J1684 Type EC, ensuring hoses like the 88404 maintain proper heat resistance and flexibility. The inclusion of a protective sleeve enhances hose longevity by guarding against abrasion and environmental damage.

Technical Description and Specifications

The Dayco 88404 heater hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals. Both ends of the hose have a 3/4 inch inside diameter, making it suitable for specific HVAC connections in the Nissan Pathfinder and INFINITI QX4. The hose is black in color and features a protective sleeve to prevent wear from contact with other engine components. It does not include a heat shield but meets SAE J20R3 Class D-1 and SAE J1684 Type EC standards, which define performance criteria for heater hoses in automotive applications.

Applications and Common Issues Addressed

• Replacement of worn or cracked heater hoses in Nissan Pathfinder HVAC systems
• Repair of leaks causing loss of heater core coolant flow in INFINITI QX4
• Prevention of hose failure due to abrasion with protective sleeve
• Restoration of proper heater core function to maintain cabin heating
• Addressing hose degradation from heat and chemical exposure

Installation Notes and Tips

When installing the Dayco Small I.D. Heater Hose 88404, ensure the vehicle is cool and the cooling system is depressurized. Verify the 3/4 inch inside diameter matches the heater core and HVAC pipe fittings on your Nissan Pathfinder or INFINITI QX4. Use appropriate clamps to secure the hose ends and inspect the protective sleeve for proper positioning to avoid abrasion. Check for leaks after installation by running the engine and monitoring heater core operation.

Quality Assurance and Warranty

Dayco manufactures the 88404 heater hose to meet stringent SAE specifications, ensuring consistent quality and durability. The EPDM material and protective sleeve contribute to extended service life under typical operating conditions. While specific warranty details are not provided here, Dayco products generally come with manufacturer-backed quality assurance to support reliable HVAC system performance.