Dayco 70873 HVAC Heater Hose - Heater To Engine or Heater To Pipe

Overview of Dayco Curved Radiator Hose 70873

The Dayco Curved Radiator Hose 70873 is designed to provide reliable coolant flow in HVAC systems for select Kia, Mercury, and Toyota vehicles. Engineered with durable EPDM material, this black single inside diameter hose ensures consistent performance in demanding automotive environments.

• Constructed from 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 standards
• Single inside diameter hose type with a trunk height of 9 1/2 inches
• Compatible with Kia Sorento, Mercury Grand Marquis, and Toyota Tundra models

Detailed Product Description

The Dayco Curved Radiator Hose 70873 is part of the Curved Radiator Hose product line, which focuses on delivering precise fit and durability for HVAC heater hose applications. This hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and automotive fluids, making it suitable for maintaining HVAC system integrity. The hose features a consistent 5/8 inch inside diameter on both ends, ensuring proper coolant flow and connection compatibility. It meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, confirming its suitability for automotive HVAC systems. The hose’s black color and 9 1/2 inch trunk height provide a clean, functional fit within the engine bay.

Applications and Problem Solving

• Replaces worn or cracked heater hoses in Kia Sorento HVAC systems
• Restores proper coolant flow in Mercury Grand Marquis heater circuits
• Prevents coolant leaks and overheating issues in Toyota Tundra HVAC units
• Addresses hose degradation caused by heat and chemical exposure
• Eliminates fitment issues with a precise 5/8 inch inside diameter on both ends

Installation Notes and Tips

• Ensure the hose is routed without kinks or sharp bends to maintain coolant flow
• Verify the 5/8 inch inside diameter matches the vehicle’s heater hose fittings
• Inspect clamps and replace if necessary to secure the hose properly
• Allow the engine to cool before removing the old hose to avoid burns
• Check for leaks after installation by running the HVAC system and monitoring coolant flow

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70873 to meet stringent SAE standards, ensuring reliable performance in automotive HVAC applications. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls and are designed for durability and long service life in compatible Kia Sorento, Mercury Grand Marquis, and Toyota Tundra vehicles.