Dayco 87870 HVAC Heater Hose - Heater To Pipe, Heater To Water Pump or Oil Cooler To Pipe

Overview of Dayco Small I.D. Heater Hose 87870

The Dayco Small I.D. Heater Hose 87870 is designed for reliable HVAC system performance in select Audi, Chevrolet, Ford, and Volkswagen vehicles. Engineered with durable EPDM material, this dual inside diameter hose supports efficient heater core operation in models like the Audi A6, Chevrolet Cavalier, Ford Mustang, and Volkswagen Passat.

• Constructed from high-quality EPDM for heat and chemical resistance
• Dual inside diameters: 5/8 inch and 3/4 inch for versatile fitment
• Complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards
• Black color for OEM appearance and easy identification
• 18-inch trunk height for proper routing in HVAC systems
• Outside diameters: 15/16 inch (End 1) and 1 3/32 inch (End 2)
• Compatible with multiple vehicle makes and models including Audi A6 Quattro and Ford Mustang

About the Small I.D. Heater Hose Product Line

The Dayco Small I.D. Heater Hose line focuses on providing HVAC heater hoses with dual inside diameters to accommodate specific OEM requirements. This product line ensures proper fit and function in various vehicle HVAC systems by offering hoses that meet strict SAE specifications. The 87870 part number is part of this line, delivering a precise fit for vehicles requiring a dual inside diameter hose without heat shields or protective sleeves.

Detailed Product Description

The Dayco 87870 heater hose is manufactured from EPDM, a synthetic rubber known for its resistance to heat, ozone, and automotive fluids, making it suitable for HVAC applications. The hose features a dual inside diameter design, with one end measuring 5/8 inch and the other 3/4 inch, allowing it to connect different HVAC components securely. Its black color matches OEM standards, and the hose length of 18 inches provides adequate reach within the vehicle’s heating system. This hose does not include a heat shield or protective sleeve, which is consistent with many factory-installed heater hoses.

Common Applications and Issues Addressed

• Replacement of worn or cracked heater hoses in Audi A6 and A6 Quattro HVAC systems
• Repair of coolant leaks in Chevrolet Cavalier and Corsica heater core lines
• Restoration of proper heater function in Ford Mustang HVAC assemblies
• Fixing heater hose failures causing insufficient cabin heat in Volkswagen Passat
• Addressing hose degradation due to heat and chemical exposure in multiple vehicle models

Installation Notes and Tips

When installing the Dayco Small I.D. Heater Hose 87870, ensure the hose is routed according to the vehicle manufacturer’s specifications to avoid kinks or interference with moving parts. Use appropriate clamps to secure each end, matching the 5/8 inch and 3/4 inch inside diameters. Inspect adjacent components for wear or damage during replacement. Since this hose does not include a heat shield or protective sleeve, verify that the installation location does not expose the hose to excessive heat sources.

Quality Assurance and Warranty

Dayco manufactures the 87870 heater hose to meet SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for HVAC hoses. The EPDM material and construction provide durability and resistance to common automotive fluids and heat. Warranty details should be confirmed with the point of purchase or manufacturer, as they may vary by region and application.