Dayco 86819 HVAC Heater Hose

Reliable HVAC Heater Hose for Select Toyota and GM Models

The Dayco Small I.D. Heater Hose 86819 is engineered to meet the demanding requirements of HVAC systems in various vehicles including Toyota Tacoma, 4Runner, and Chevrolet Malibu. Designed with durable EPDM material and precise 5/16 inch inside diameters, this hose ensures consistent heater core performance and fluid flow.

• Constructed from high-quality EPDM for heat and chemical resistance
• Uniform 5/16 inch inside diameter on both ends for secure connections
• Complies with SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Single inside diameter hose type for streamlined installation
• Compatible with multiple makes and models including Buick, Chevrolet, Lexus, Oldsmobile, Pontiac, Saturn, and Toyota

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 diameter hoses. This product line is designed to meet SAE standards for heater hoses, providing consistent durability and resistance to heat and coolant exposure. The 86819 part number is a representative example, offering a black EPDM hose with a trunk height of 18 inches, suitable for a range of vehicle applications.

Detailed Product Description

The Dayco 86819 heater hose is manufactured from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant fluids. Both ends of the hose feature a 5/16 inch inside diameter, ensuring compatibility with HVAC fittings on vehicles such as the Toyota Supra, Lexus IS300, and Pontiac Grand Am. This single inside diameter hose does not include a heat shield or protective sleeve, making it a straightforward replacement part for HVAC heater core lines. The hose meets SAE J20R3 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive heating and cooling systems.

Common Applications and Issues Addressed

• Replacement of worn or cracked heater hoses in Toyota Tacoma and 4Runner HVAC systems
• Resolving coolant leaks in Chevrolet Malibu and Buick Skylark heater lines
• Maintaining proper heater core fluid flow in Lexus GS300 and IS300 models
• Preventing overheating issues caused by degraded heater hoses in Pontiac G6 and Saturn Aura
• Ensuring HVAC system reliability in Oldsmobile Achieva and Chevrolet Cavalier vehicles

Installation Notes and Tips

When installing the Dayco Small I.D. Heater Hose 86819, ensure the hose is cut to the correct length if necessary and securely clamped at both ends to prevent leaks. Verify that the 5/16 inch inside diameter matches the vehicle’s heater core and engine fittings. Avoid twisting or kinking the hose during installation to maintain proper coolant flow. Inspect surrounding components for wear or damage to ensure a complete HVAC system repair.

Quality Assurance and Warranty

Dayco manufactures the 86819 heater hose to meet stringent SAE specifications, ensuring durability and performance under typical automotive operating conditions. While specific warranty details are not provided, Dayco products are generally backed by quality standards that support reliable service life in HVAC applications.