Dayco 87979 HVAC Heater Hose - Heater To Valve Outlet or Pipe To Thermostat

Overview of Dayco Small I.D. Heater Hose 87979

The Dayco Small I.D. Heater Hose 87979 is designed for reliable HVAC system performance in select Cadillac, Chevrolet, and GMC vehicles. Engineered with durable EPDM material, this black heater hose ensures consistent heat transfer and fluid flow for your vehicle's heating system.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Black color for standard OEM appearance
• 5/8 inch inside diameter on both ends for precise fitment
• 31/32 inch outside diameter on both ends
• Single I.D. hose type compliant with SAE J20R3 Class D-1 and SAE J1684 Type EC standards
• Trunk height of 21 1/2 inches for proper routing

About the Small I.D. Heater Hose Product Line

The Small I.D. Heater Hose line by Dayco focuses on providing hoses with smaller inside diameters tailored for specific HVAC applications. This product line emphasizes compatibility with OEM specifications, ensuring proper fit and function in heating systems. The 87979 hose is part of this line, offering a precise 5/8 inch inside diameter that matches factory requirements for select vehicle models.

Detailed Product Description

This Dayco heater hose is manufactured from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. The hose features a consistent 5/8 inch inside diameter on both ends, with an outside diameter of 31/32 inch, making it suitable for HVAC systems requiring a single I.D. hose. It meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, ensuring it adheres to industry standards for heater hoses. The hose does not include a heat shield or protective sleeve, which is typical for this type of HVAC hose. Its 21 1/2 inch trunk height allows for proper installation and routing within the vehicle's engine compartment.

Compatible Vehicles and Common Applications

• Replacement heater hose for Cadillac SRX and STS models
• Compatible with Chevrolet Astro and Safari vans
• Suitable for GMC vehicles requiring a 5/8 inch I.D. heater hose
• Addresses issues such as heater core leaks, hose cracks, and coolant flow interruptions
• Helps restore proper heating system function and prevent coolant loss

Installation Notes and Tips

Ensure the engine is cool before beginning installation to avoid burns from hot coolant. Verify hose dimensions and fitment against the original hose to confirm compatibility. Use appropriate clamps to secure the hose ends and check for leaks after installation. Avoid twisting or kinking the hose during installation to maintain proper coolant flow.

Quality Assurance and Warranty

Dayco manufactures this heater hose to meet SAE specifications, ensuring durability and performance in HVAC applications. While specific warranty details are not provided, Dayco products typically adhere to strict quality control standards to support reliable vehicle operation.