Dayco 71518 Engine Coolant Bypass Hose

Overview of Dayco Curved Radiator Hose 71518

The Dayco Curved Radiator Hose 71518 is engineered for reliable engine coolant bypass in select Ford and Mercury vehicles. Designed with durable EPDM material, this dual inside diameter hose ensures proper coolant flow and temperature regulation for models like the Ford Explorer and Mercury Mountaineer.

• Constructed from high-quality EPDM for heat and chemical resistance
• Dual inside diameters: 17/32 inch and 23/32 inch ends for precise fit
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Black color for standard OEM appearance
• Trunk height of 4 inches for optimal routing in engine bay

Detailed Product Description

The Dayco 71518 is part of the Curved Radiator Hose line, designed specifically to accommodate the unique coolant bypass requirements of certain Ford and Mercury vehicles. This engine coolant bypass hose features a dual inside diameter design, with one end measuring 17/32 inch and the other 23/32 inch, allowing for a secure and leak-free connection between different engine components. Manufactured from EPDM, the hose offers resistance to heat, ozone, and automotive fluids, ensuring durability under typical engine operating conditions. The hose does not include a heat shield or protective sleeve, which is consistent with its intended application in less exposed areas of the cooling system.

Compatible Vehicles and Applications

This Dayco Curved Radiator Hose 71518 is compatible with the following vehicles:

• Ford Cougar
• Ford Explorer
• Mercury Mountaineer
• Ford Thunderbird

It is designed to replace the engine coolant bypass hose in these models, maintaining proper coolant circulation and preventing overheating issues.

Common Issues Addressed by This Hose

• Coolant leaks due to cracked or worn bypass hoses
• Engine overheating caused by restricted coolant flow
• Hose collapse or deformation under pressure
• Premature hose failure from exposure to heat and chemicals
• Improper fitment leading to coolant system inefficiency

Installation Notes and Tips

• Ensure engine is cool before removing the old hose
• Check hose ends and clamps for corrosion or damage
• Verify correct orientation of the dual inside diameter ends during installation
• Use appropriate clamps to secure hose ends firmly
• Inspect the cooling system for leaks after installation

Quality Assurance and Warranty

Dayco manufactures the 71518 hose 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, Dayco products typically undergo rigorous quality control to maintain reliability and performance in automotive cooling systems.