Gates 21559 Radiator Coolant Hose - Lower - Engine To Pipe, Lower - Pipe To Radiator or Upper - Pipe To Radiator

Overview of Gates Molded Coolant Hose 21559

The Gates Molded Coolant Hose 21559 is engineered for reliable radiator coolant transfer in various vehicle applications. Constructed from durable EPDM material, this molded hose is designed to maintain optimal cooling system performance under demanding conditions.

• Made from high-quality EPDM for heat and chemical resistance
• Molded design ensures precise fit and durability
• Contains internal spring to prevent collapse under vacuum
• End 1 and End 2 inside diameters both measure 2 inches (51 mm)
• Centerline length of 9.5 inches (241 mm) for accurate fitment
• No quick connect fittings or branches, simplifying installation

Detailed Product Description

This radiator coolant hose from Gates, part number 21559, belongs to the Molded Coolant Hose product line, which focuses on delivering hoses with exact molded shapes to match specific vehicle cooling system requirements. The molded construction reduces the risk of leaks and improves hose longevity by eliminating the need for multiple clamps or joints. The EPDM material offers resistance to heat, ozone, and coolant chemicals, making it suitable for extended use in automotive cooling systems.

The hose features a built-in spring to prevent collapse during engine vacuum conditions, ensuring consistent coolant flow. Both ends have an inside diameter of 2 inches (51 mm), and the hose measures 9.5 inches (241 mm) in centerline length, providing a precise fit for compatible vehicles. This hose does not include quick connect fittings or branches, which simplifies its integration into existing cooling systems.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in compatible vehicles
• Prevention of coolant leaks caused by hose deterioration
• Elimination of hose collapse under vacuum conditions due to internal spring
• Maintaining proper coolant flow to prevent engine overheating
• Ensuring a secure, molded fit to reduce coolant system failures

Installation Notes and Tips

When installing the Gates Molded Coolant Hose 21559, ensure the hose is routed according to the vehicle manufacturer’s specifications to avoid kinks or undue stress. Verify that the 2-inch (51 mm) inside diameter matches the radiator and engine fittings. The molded shape should align precisely with the cooling system layout, reducing the need for additional clamps beyond those recommended by the vehicle manufacturer. Inspect the hose ends for proper seating and secure clamps to prevent leaks.

Quality Assurance and Warranty

Gates Molded Coolant Hose 21559 is manufactured to meet stringent automotive standards for durability and performance. The EPDM material and molded design contribute to long service life under typical operating conditions. While specific warranty details are not provided, Gates products generally adhere to industry quality controls to ensure reliability in automotive cooling systems.