Dayco 88421 HVAC Heater Hose - Heater Outlet

Overview of Dayco Small I.D. Heater Hose 88421

The Dayco Small I.D. Heater Hose 88421 is designed for reliable HVAC system performance in Acura TL and Nissan Altima vehicles. Constructed from durable EPDM material, this hose ensures consistent heat transfer and resistance to automotive fluids.

• Material: EPDM for heat and chemical resistance
• Color: Black
• Inside Diameter: 3/4 inch on both ends
• Hose Type: Single I.D. hose
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Trunk Height: 22 inches
• Compatible with Acura TL and Nissan Altima models

Detailed Product Description

The Dayco Small I.D. Heater Hose 88421 is engineered to meet stringent SAE standards, including SAE J20R3 Class D-1 and SAE J1684 Type EC, ensuring it withstands the demands of automotive heating and cooling systems. Made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids, this hose maintains flexibility and durability under varying temperature conditions. Both ends feature a 3/4 inch inside diameter, making it suitable for specific HVAC connections in Acura TL and Nissan Altima vehicles. The hose is black in color and does not include a heat shield or protective sleeve, consistent with its design as a single I.D. hose.

About the Small I.D. Heater Hose Product Line

The Small I.D. Heater Hose line from Dayco focuses on providing precise fitment and reliable performance for smaller diameter HVAC applications. This product line is tailored to meet OEM specifications for heater hoses that require a 3/4 inch inside diameter, ensuring compatibility and durability in vehicle heating systems. The 88421 part number is part of this line, offering a dependable replacement option for Acura TL and Nissan Altima models.

Common Applications and Issues Addressed

• Replacement of cracked or leaking heater hoses in Acura TL and Nissan Altima HVAC systems
• Resolving coolant leaks that affect cabin heating performance
• Preventing hose collapse or blockage that restricts coolant flow
• Addressing hose degradation due to heat and chemical exposure
• Maintaining proper heater core function by ensuring secure hose connections

Installation Notes and Tips

• Verify hose inside diameter matches the vehicle’s HVAC fittings (3/4 inch)
• Inspect surrounding components for wear or damage before installation
• Ensure clamps are properly tightened to prevent leaks without damaging the hose
• Replace hoses in pairs when possible to maintain system integrity
• Check for proper routing to avoid kinks or contact with hot engine parts

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 88421 to meet SAE specifications, ensuring consistent quality and performance. The EPDM material provides resistance to heat, ozone, and automotive fluids, contributing to long service life. While specific warranty details are not provided, Dayco products typically adhere to industry standards for durability and reliability.