Dayco 86803 HVAC Heater Hose

Overview of Dayco Small I.D. Heater Hose 86803

The Dayco Small I.D. Heater Hose 86803 is designed for reliable HVAC system performance in various vehicles including Acura, Chevrolet, Honda, INFINITI, Isuzu, Mazda, and Nissan models. This hose ensures proper coolant flow within the heating system, maintaining cabin comfort and engine efficiency.

• Constructed from durable EPDM material for heat and chemical resistance
• Black color for standard OEM appearance
• Consistent 5/16 inch inside diameter on both ends for secure fitment
• Single I.D. hose type compliant with SAE J20R3 Class D-1 and SAE J1684 Type EC standards
• Trunk height of 5 1/4 inches for precise installation

Dayco Small I.D. Heater Hose Product Line Details

The Small I.D. Heater Hose line by Dayco focuses on delivering hoses with smaller inside diameters suitable for specific HVAC applications. This product line emphasizes compliance with SAE specifications to ensure compatibility and durability in heating systems. The 86803 hose is part of this line, providing a reliable replacement option for vehicles requiring a 5/16 inch inside diameter hose without additional heat shields or protective sleeves.

Technical Description and Compatibility

The Dayco 86803 heater hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, making it suitable for HVAC heater core connections. Both ends of the hose have a 5/16 inch inside diameter, ensuring a consistent and secure connection. This single I.D. hose does not include a heat shield or protective sleeve, which is typical for applications where additional protection is not required. It meets SAE J20R3 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive heating systems.

This hose is compatible with a range of vehicles, including Acura Integra and RSX models, Chevrolet Tracker, Honda Civic, Civic del Sol, CRX, and Prelude, INFINITI G20, Isuzu Impulse, Mazda MX-6 and RX-7, and Nissan Sentra. The part number 86803 should be referenced to ensure correct fitment.

Common Applications and Problem Resolution

• Replacement of worn or cracked heater hoses causing coolant leaks
• Restoring proper coolant flow to the heater core for effective cabin heating
• Addressing overheating issues related to HVAC system coolant circulation
• Eliminating hose collapse or blockage that restricts coolant flow
• Upgrading OEM hoses with a durable EPDM material for extended service life

Installation Notes and Tips

• Verify the 5/16 inch inside diameter matches your vehicle’s heater hose fittings
• Inspect hose routing to avoid sharp bends or contact with moving parts
• Ensure clamps are properly tightened to prevent leaks without damaging the hose
• Replace hoses when the engine is cool to avoid burns and coolant spills
• Check for compatibility with your specific make and model using part number 86803

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 86803 to meet SAE standards, ensuring consistent quality and performance. The EPDM material provides resistance to heat and chemicals commonly found in automotive HVAC systems. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls and are backed by manufacturer support for defects in materials and workmanship.