Dayco 71231 HVAC Heater Hose

Overview of Dayco Curved Radiator Hose 71231

The Dayco Curved Radiator Hose 71231 is designed to provide reliable coolant flow for various vehicle models including Chevrolet Silverado 2500 HD, Jeep Cherokee, and Dodge Ram 50. Constructed from durable EPDM material, this black single inside diameter hose ensures consistent performance under typical engine operating conditions.

• Made from high-quality EPDM material for heat and chemical resistance
• Black color with 5/8 inch inside diameter on both ends
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Single inside diameter hose type with a trunk height of 6 1/2 inches
• Compatible with multiple makes and models including Chevrolet, Chrysler, Dodge, GMC, Hyundai, Jeep, Mazda, Mitsubishi, Plymouth, and Pontiac

Detailed Product Description

The Dayco Curved Radiator Hose 71231 is engineered to meet stringent SAE standards, specifically SAE J20R4 Class D-1 and SAE J1684 Type EC, ensuring it withstands the demands of automotive HVAC systems. Its EPDM construction offers excellent resistance to heat, ozone, and coolant chemicals, making it suitable for use in heater core and radiator connections. The hose features a consistent 5/8 inch inside diameter on both ends, facilitating a secure fit and efficient coolant flow. The black finish provides a professional appearance and durability against environmental factors. This hose does not include a heat shield or protective sleeve, which is typical for this hose type and application.

About the Curved Radiator Hose Product Line

Dayco's Curved Radiator Hose line focuses on delivering hoses with precise bends and dimensions to fit specific vehicle applications without modification. This product line is designed to maintain proper coolant flow and system integrity by matching OEM specifications for curvature and size. The 71231 part number is part of this line, ensuring compatibility and performance for vehicles requiring a curved radiator hose with a 5/8 inch inside diameter.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator hoses in Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD
• Resolving coolant leaks in Jeep Cherokee and Dodge Ram 50 heater hose connections
• Maintaining proper coolant circulation in Hyundai Equinox and Mazda MPV HVAC systems
• Preventing overheating caused by deteriorated or collapsed hoses in Mitsubishi Montero and Plymouth Voyager
• Ensuring secure hose fitment in Pontiac Torrent and Chrysler Sebring cooling systems

Installation Notes and Tips

• Verify hose inside diameter and length match vehicle specifications before installation
• Inspect hose clamps and replace if corroded or damaged to ensure a tight seal
• Drain coolant system prior to hose removal to prevent spills
• Check for proper hose routing to avoid kinks or contact with moving parts
• After installation, refill coolant and bleed air from the system as recommended by the vehicle manufacturer

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71231 to meet SAE standards, ensuring consistent quality and durability. While specific warranty details are not provided, Dayco products typically come with a limited warranty against defects in material and workmanship. Users should consult Dayco or their vehicle service manual for warranty terms and installation guidelines.