Gates 21648 Radiator Coolant Hose - Upper

Overview of Gates Molded Coolant Hose 21648

The Gates Molded Coolant Hose 21648 is designed for reliable cooling system performance in select Chevrolet and GMC trucks. Engineered with durable EPDM material, this radiator coolant hose ensures consistent fit and function for models including C10, C1500, K10, and R1500.

• Constructed from high-quality EPDM for heat and chemical resistance
• Molded design for precise fit and leak prevention
• Centerline length of 29.8 inches (757 mm) for accurate installation
• Inside diameter of 1.25 inches (32 mm) on both ends
• Compatible with Chevrolet and GMC truck models from C10 to V1500

Detailed Product Description

This radiator coolant hose, part number 21648, is part of the Gates Molded Coolant Hose product line, known for its molded construction that provides a secure and exact fit. The hose is made from EPDM, a synthetic rubber material that offers excellent resistance to heat, ozone, and coolant chemicals, making it suitable for demanding engine environments. Both ends of the hose have an inside diameter of 1.25 inches (32 mm), ensuring compatibility with the cooling system connections on Chevrolet and GMC trucks such as the C20, K2500, and R2500 series. The hose’s centerline length measures 29.8 inches (757 mm), which matches OEM specifications for proper routing and installation.

Compatible Vehicles and Applications

• Chevrolet C10, C20, C1500, C2500
• Chevrolet K10, K20, K1500, K2500
• Chevrolet R10, R20, R1500, R2500
• Chevrolet V10, V1500
• GMC C10, C20, C1500, C2500
• GMC K10, K20, K1500, K2500
• GMC R10, R20, R1500, R2500
• GMC V10, V1500

Common Issues Addressed by This Radiator Coolant Hose

• Coolant leaks due to cracked or worn hoses
• Overheating caused by restricted or collapsed hoses
• Improper fitment leading to coolant system pressure loss
• Degradation from exposure to heat and chemicals
• Replacement of aging or damaged OEM hoses

Installation Notes and Tips

• Ensure the engine is cool before removing the old hose
• Check all clamps and connections for wear and replace if necessary
• Verify the hose orientation matches OEM routing for proper fit
• Inspect the cooling system for leaks after installation
• Use appropriate tools to avoid damaging hose ends during installation

Quality Assurance and Warranty

Gates Molded Coolant Hose 21648 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, ensuring long service life. While specific warranty details may vary, Gates products typically come with a limited warranty against defects in material and workmanship. Refer to the manufacturer’s warranty policy for complete information.