Dayco 87774 HVAC Heater Hose

Durable HVAC Heater Hose for Chevrolet, Ford, GMC, Mazda, and Mitsubishi

The Dayco Small I.D. Heater Hose 87774 is engineered to provide reliable performance in your vehicle's heating system. Designed with quality EPDM material and a protective sleeve, this hose ensures durability and resistance to heat and wear for models like the Chevrolet Silverado 2500 HD and Ford Sierra 3500 HD.

• Constructed from durable EPDM material for heat and chemical resistance
• Black color with a 5/8 inch inside diameter on both ends
• Single I.D. hose design with protective sleeve for added durability
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Compatible with multiple makes and models including Chevrolet, Ford, GMC, Mazda, and Mitsubishi

About the Dayco Small I.D. Heater Hose Product Line

The Small I.D. Heater Hose line by Dayco focuses on delivering precise fitment and reliable performance for HVAC systems requiring smaller inside diameter hoses. This product line emphasizes quality materials and compliance with SAE standards, ensuring compatibility and durability for a range of vehicle applications. The 87774 hose is part of this line, offering a single inside diameter hose with a protective sleeve to enhance longevity in demanding engine environments.

Product Details and Specifications

The Dayco 87774 heater hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. Both ends of the hose have a 5/8 inch inside diameter, making it suitable for HVAC systems requiring consistent hose sizing. The hose includes a protective sleeve to guard against abrasion and environmental damage, although it does not contain a heat shield. It complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for heater hoses.

Common Applications and Problem Solving

• Replacement of worn or cracked heater hoses in Chevrolet Silverado 3500 HD and Sierra 2500 HD models
• Resolving coolant leaks in HVAC systems of Ford Sierra 3500 HD and GMC Sierra 2500 HD vehicles
• Upgrading aging heater hoses in Mazda MX-6 and Mitsubishi Galant for improved durability
• Addressing heater hose failures that cause insufficient cabin heating
• Maintaining proper coolant flow in HVAC systems of Mitsubishi Millenia and Ford Probe

Installation Notes and Tips

Ensure the engine is cool before removing the old heater hose to prevent burns. Verify the 5/8 inch inside diameter matches your vehicle’s specifications. Inspect hose connections and clamps for corrosion or damage and replace if necessary. The protective sleeve on this hose helps reduce abrasion, but proper routing away from sharp edges is recommended. Tighten clamps securely to prevent leaks without over-tightening, which can damage the hose.

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 87774 to meet strict SAE standards, ensuring reliable performance in HVAC applications. The use of EPDM material and protective sleeve enhances durability against heat and environmental factors. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls and are backed by the brand’s commitment to automotive component standards.