Dayco 86128 HVAC Heater Hose

Overview of Dayco Small I.D. Heater Hose 86128

The Dayco Small I.D. Heater Hose 86128 is designed for reliable HVAC system performance in select Buick, Mercury, Nissan, Oldsmobile, and Pontiac vehicles. Engineered with durable EPDM material, this hose ensures consistent heat transfer and resistance to automotive fluids.

• Constructed from EPDM for heat and chemical resistance
• Black single inside diameter hose with 23/32 inch ID on both ends
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Does not include heat shield or protective sleeve
• Compatible with Buick 88, 98, LeSabre, Park Avenue, Oldsmobile 88, 98, Pontiac Bonneville, Mercury Villager, and Nissan Quest

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

The Dayco Small I.D. Heater Hose line focuses on single inside diameter hoses designed for HVAC applications requiring precise fitment and durability. This product line emphasizes compliance with SAE standards such as J20R3 Class D-1 and J1684 Type EC, ensuring hoses withstand typical heater core system pressures and temperatures without degradation. The 86128 part exemplifies this line’s commitment to quality materials and exact fit for specific vehicle models.

Technical Description and Specifications

The Dayco 86128 heater hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids, making it suitable for HVAC heater core connections. Both ends of the hose have an inside diameter of 23/32 inches, providing a consistent seal and fit. This single inside diameter hose does not include additional heat shielding or protective sleeves, which is typical for applications where external heat exposure is minimal. The hose’s trunk height is 10, supporting proper routing within the engine bay.

Applications and Common Issues Addressed

• Replacement of cracked or leaking heater hoses in Buick 88, 98, and LeSabre models
• Resolving coolant leaks in Pontiac Bonneville and Oldsmobile 98 HVAC systems
• Restoring proper heater core flow in Mercury Villager and Nissan Quest vehicles
• Addressing hose deterioration due to age or exposure to engine heat
• Ensuring compliance with SAE specifications for HVAC hose performance

Installation Notes and Tips

When installing the Dayco Small I.D. Heater Hose 86128, ensure the hose is routed without kinks or sharp bends to maintain coolant flow. Verify that the 23/32 inch inside diameter matches the heater core and pipe fittings on your specific vehicle model. Use appropriate clamps to secure the hose ends and check for leaks after installation. It is recommended to inspect adjacent components for wear during replacement to prevent future HVAC system issues.

Quality Assurance and Warranty

Dayco manufactures the 86128 heater hose to meet SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring durability and performance under typical automotive conditions. While specific warranty details are not provided, Dayco products generally adhere to industry quality controls and are backed by the brand’s commitment to reliable automotive components.