Dayco 70637 Engine Coolant Bypass Hose

Overview of Dayco Curved Radiator Hose 70637

The Dayco Curved Radiator Hose 70637 is engineered for reliable engine coolant bypass in select Chrysler, Dodge, Nissan, and Plymouth vehicles. Designed with durable EPDM material, this black single inside diameter hose ensures consistent performance under typical engine operating conditions.

• Constructed from EPDM for heat and chemical resistance
• Black color with 1 inch inside diameter on both ends
• Single i.d. hose type for precise fitment
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk height of 5 7/8 inches for proper routing

Detailed Product Description

This engine coolant bypass hose, part number 70637, is part of Dayco's Curved Radiator Hose line, designed to provide a reliable coolant path in various vehicle cooling systems. The hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, making it suitable for extended use in automotive cooling applications. Both ends feature a 1 inch inside diameter, ensuring compatibility with corresponding fittings on the engine and radiator. The hose does not include a heat shield or protective sleeve, which is typical for this type of bypass hose. It complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive coolant systems. The trunk height of 5 7/8 inches allows for proper installation and routing within the engine bay.

Compatible Vehicles and Applications

This Dayco Curved Radiator Hose 70637 is compatible with a range of Chrysler, Dodge, Nissan, and Plymouth models, including but not limited to the Nissan 200SX and 300ZX, Dodge Challenger, Charger, Dakota, and Ramcharger, as well as Plymouth models like the B100 through B350 series and the Dodge D100 through D350 series. It is designed specifically for engine coolant bypass applications in these vehicles, ensuring proper coolant flow and temperature regulation.

• Replaces worn or cracked engine coolant bypass hoses
• Prevents coolant leaks and overheating issues
• Restores proper coolant circulation in the radiator system
• Addresses hose swelling or softening due to age or heat exposure
• Eliminates coolant contamination from hose deterioration

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 70637, ensure the engine is cool to avoid burns or injury. Verify that the hose diameter matches the vehicle’s fittings and that the hose routing follows the original path to prevent kinks or interference with other engine components. Use appropriate clamps to secure both ends firmly, and inspect the cooling system for leaks after installation. No heat shield or protective sleeve is included, so take care to avoid contact with sharp edges or excessive heat sources during installation.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose line to meet SAE specifications, ensuring consistent quality and performance. The 70637 hose is built to withstand typical automotive coolant system conditions. While specific warranty details are not provided here, Dayco products generally come with manufacturer-backed quality assurance. For warranty information, refer to Dayco’s official documentation or contact authorized distributors.