Dayco 71663 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 71663

The Dayco Curved Radiator Hose 71663 is designed to provide reliable coolant flow for various BMW models. Engineered with durable EPDM material, this radiator coolant hose ensures consistent performance under typical engine operating conditions.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Black single inside diameter hose with 1 19/32 inch diameter on both ends
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk height of 12 inches for precise fitment
• Compatible with multiple BMW models including 320i, 323i, 325i, 328i, 525i, 528i, 530i, M3, and Z3

Detailed Product Description

The Dayco Curved Radiator Hose 71663 is part of the Curved Radiator Hose product line, which focuses on delivering hoses shaped to fit specific engine layouts and cooling system designs. This hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, making it suitable for maintaining coolant flow in demanding automotive environments. Both ends of the hose have an inside diameter of 1 19/32 inches, ensuring a secure connection to the radiator and engine fittings. The hose does not include a heat shield or protective sleeve, which is typical for this type of single inside diameter hose. It complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive coolant applications.

Compatible Vehicles and Applications

This radiator coolant hose is compatible with a range of BMW vehicles, including the 320i, 323i, 323is, 325i, 325is, 328i, 328is, 525i, 528i, 530i, M3, and Z3 models. It is designed to replace original equipment hoses that require a curved shape and specific diameter for proper coolant system function.

• Replaces worn or cracked radiator hoses causing coolant leaks
• Prevents overheating due to coolant flow restrictions
• Restores proper coolant circulation in BMW 3 Series and 5 Series models
• Addresses hose swelling or softening from heat exposure
• Eliminates coolant contamination from hose deterioration

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 71663, ensure the engine is cool to avoid burns from hot coolant. Verify that the hose diameter matches the radiator and engine fittings for a secure seal. Use appropriate clamps to prevent leaks and check for any signs of wear on adjoining components. Proper routing is essential to avoid kinks or contact with moving parts.

Quality Assurance and Warranty

Dayco manufactures this radiator coolant hose to meet industry SAE specifications, ensuring consistent quality and performance. While specific warranty details are not provided, Dayco products typically adhere to strict quality control standards to support reliable operation in BMW cooling systems.