Gates 21948 Radiator Coolant Hose - Upper

Overview of Gates Molded Coolant Hose 21948

The Gates Molded Coolant Hose 21948 is designed for reliable cooling system performance in select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent coolant flow and heat resistance for models like the Lumina APV, Lumina Van, Riviera, Silhouette, and Trans Sport.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Molded design for precise fit and secure installation
• Centerline length of 16.4 inches (417 mm) for accurate routing
• Inside diameter of 1.3 inches (33 mm) on both ends for consistent coolant flow
• Compatible with multiple GM makes and models including Buick, Chevrolet, Oldsmobile, and Pontiac

Details on the Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates focuses on delivering hoses that are pre-formed to match specific vehicle cooling system layouts. This eliminates the need for bending or shaping during installation, reducing the risk of kinks or leaks. The molded construction of part number 21948 ensures a precise fit for the intended applications, improving durability and system efficiency.

Technical Description and Specifications

This radiator coolant hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals. Both ends of the hose have an inside diameter of 1.3 inches (33 mm), providing consistent flow capacity. The hose measures 16.4 inches (417 mm) in centerline length, designed to fit the cooling system routing of compatible vehicles without modification. The hose does not contain any internal springs or quick connect fittings, simplifying installation and maintenance.

Applications and Common Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in Buick Lumina APV and Lumina Van
• Restoring proper coolant flow in Chevrolet Silhouette and Trans Sport cooling systems
• Fixing leaks caused by hose degradation in Oldsmobile Riviera models
• Preventing overheating issues related to damaged or collapsed hoses
• Ensuring secure coolant circulation in Pontiac vehicles requiring a molded hose design

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Ensure the cooling system is cool and depressurized prior to hose removal
• Inspect hose connections and clamps for wear and replace if necessary
• Align the molded hose carefully to avoid twisting or kinking during installation
• Check for leaks after installation by running the engine and monitoring coolant flow

Quality Assurance and Warranty Information

Gates Molded Coolant Hose 21948 is manufactured to meet or exceed OEM specifications 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 here, Gates products typically come with a limited warranty against defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.