Dayco 70638 Radiator Coolant Hose - Lower

Overview of Dayco Curved Radiator Hose 70638

The Dayco Curved Radiator Hose 70638 is designed to provide reliable coolant flow for select Ford, Mercury, and Pontiac vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent performance in demanding engine environments.

• Constructed from high-quality EPDM for heat and chemical resistance
• Black single inside diameter hose with 1 3/4 inch ends
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards
• Trunk height measures 16 3/4 inches for precise fitment
• Compatible with Ford Bronco, F-100, F-150, F-250, F-350, Mercury LTD, Montego, and Pontiac Firebird models

Detailed Product Description

The Dayco Curved Radiator Hose line focuses on delivering hoses that meet strict SAE specifications for coolant system durability and performance. Part number 70638 is a single inside diameter hose made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals. Both ends of the hose have an inside diameter of 1 3/4 inches, making it suitable for radiator connections requiring this size. The hose’s trunk height of 16 3/4 inches ensures proper routing and fitment in the engine bay without interference.

This hose does not include a heat shield or protective sleeve, which is typical for many radiator coolant hoses designed for standard engine compartments. Its black color and curved design help maintain coolant flow efficiency while fitting the contours of the specified vehicle models.

Compatible Vehicles and Applications

• Ford Bronco (various years)
• Ford F-100, F-150, F-250, F-350 trucks
• Mercury LTD and Montego models
• Pontiac Firebird

Dayco part number 70638 is intended for use in radiator coolant systems where a curved hose with these dimensions and specifications is required. It helps maintain proper engine temperature by facilitating coolant circulation between the radiator and engine.

Installation Notes and Tips

• Ensure the hose ends match the 1 3/4 inch inside diameter fittings on your vehicle
• Inspect clamps and radiator connections for wear before installation
• Replace any damaged or brittle hoses to prevent leaks
• Verify hose routing to avoid contact with moving parts or excessive heat sources
• Use appropriate coolant compatible with EPDM hoses

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70638 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for coolant hoses. While specific warranty details are not provided here, Dayco products typically come with manufacturer-backed quality assurance to support durability and performance in automotive cooling systems.