Dayco 87904 HVAC Heater Hose - Heater Outlet

Overview of Dayco Small I.D. Heater Hose 87904

The Dayco Small I.D. Heater Hose 87904 is designed for reliable HVAC system performance in select Chevrolet, Pontiac, and Suzuki vehicles. Engineered with durable EPDM material, this dual inside diameter hose ensures proper coolant flow and temperature regulation for your vehicle's heating system.

• Constructed from high-quality EPDM for heat and chemical resistance
• Dual inside diameters: 19/32 inch and 23/32 inch ends for precise fit
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Black color for standard OEM appearance
• Trunk height of 9.0 inches for proper routing
• Compatible with Chevrolet Cobalt, Pontiac G5, HHR, Pursuit, and Suzuki XL-7 models

Details on the Small I.D. Heater Hose Product Line

The Dayco Small I.D. Heater Hose product line focuses on providing HVAC heater hoses with dual inside diameters to accommodate specific vehicle applications. This design allows for a secure and leak-resistant connection in heating systems where hose ends require different inside diameters. The 87904 part exemplifies this with its 19/32 inch and 23/32 inch end sizes, ensuring compatibility with the targeted vehicle models.

Technical Description and Specifications

This HVAC heater hose is manufactured from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. The dual inside diameter hose type supports efficient coolant flow between the heater core and engine, maintaining optimal cabin heating. The hose complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive heating and cooling systems. The black color matches OEM specifications, and the hose does not include a heat shield or protective sleeve, which is typical for this application.

Applications and Common Issues Addressed

• Replacement of worn or cracked heater hoses in Chevrolet Cobalt and Pontiac G5 HVAC systems
• Resolving coolant leaks causing insufficient cabin heat in Suzuki XL-7 and Pontiac Pursuit
• Addressing hose swelling or softening due to heat exposure in Chevrolet HHR models
• Fixing improper hose fitment issues with dual diameter connections in Pontiac G5 and Suzuki XL-7
• Maintaining proper coolant flow to prevent heater core damage in Chevrolet Cobalt and HHR

Installation Notes and Tips

Ensure the vehicle is cool and the cooling system is depressurized before removing the old heater hose. Verify the hose ends match the 19/32 inch and 23/32 inch inside diameters for proper fit. Use appropriate clamps to secure the hose ends and check for leaks after installation. Avoid twisting or kinking the hose during installation to maintain coolant flow integrity.

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 87904 to meet stringent SAE specifications, ensuring durability and performance in HVAC applications. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and reliability.