Gates 20390 Radiator Coolant Hose - Lower or Upper

Reliable Radiator Coolant Hose for Select GM and Jeep Models

The Gates Molded Coolant Hose 20390 is engineered to provide dependable cooling system performance for a range of Buick, Chevrolet, GMC, Jeep, Oldsmobile, and Pontiac vehicles. Designed with precision molding and durable EPDM material, this radiator coolant hose ensures a secure fit and long-lasting service.

Key Features of Gates Molded Coolant Hose 20390

• Constructed from high-quality EPDM material for heat and chemical resistance
• Molded design for precise fit and reliable sealing
• Centerline length of 18.5 inches (470 mm) for accurate installation
• End 1 inside diameter: 1.5 inches (38 mm); End 2 inside diameter: 1.75 inches (44 mm)
• Does not contain a spring or quick connect fittings, ensuring compatibility with traditional cooling systems

About the Molded Coolant Hose Product Line

The Gates Molded Coolant Hose line focuses on delivering hoses that are pre-formed to exact specifications, reducing installation time and improving fitment accuracy. This product line is designed to meet the demands of various cooling system applications, providing consistent performance and durability. The 20390 part number is part of this line, offering a molded solution tailored for specific GM and Jeep models.

Detailed Product Description

This radiator coolant hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals. The molded construction ensures the hose maintains its shape and fits precisely between radiator and engine components. With a centerline length of 18.5 inches (470 mm), it is designed to match OEM specifications for vehicles such as the Chevrolet Camaro, Buick Skylark, GMC G20, Jeep CJ5, and Pontiac Firebird. The hose features two different inside diameters on each end—1.5 inches (38 mm) and 1.75 inches (44 mm)—to accommodate varying connection points within the cooling system.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in Buick, Chevrolet, GMC, Jeep, Oldsmobile, and Pontiac vehicles
• Resolving coolant leaks caused by hose degradation or improper fit
• Preventing overheating issues due to compromised coolant flow
• Maintaining proper coolant system pressure and flow with a molded, OEM-style hose
• Eliminating hose collapse or kinking with a molded design

Installation Notes and Tips

Ensure the engine is cool before removing the old hose to avoid burns. Verify the hose orientation matches the molded shape for proper fitment. Use appropriate clamps to secure each end of the hose, matching the specified inside diameters of 1.5 inches (38 mm) and 1.75 inches (44 mm). Inspect surrounding components for wear or damage during installation. No spring or quick connect fittings are included, so compatibility with traditional clamp systems is required.

Quality Assurance and Warranty

Gates Molded Coolant Hose 20390 is manufactured to meet or exceed OEM standards for durability and performance. The EPDM material and molded construction provide resistance to heat, pressure, and coolant chemicals. While specific warranty details are not provided, Gates products typically come with a limited warranty against defects in material and workmanship.