Gates 21649 Radiator Coolant Hose - Upper

Overview of Gates Molded Coolant Hose 21649

The Gates Molded Coolant Hose 21649 is designed for reliable cooling system performance in select Chevrolet and GMC trucks and SUVs. Engineered with durable EPDM material, this radiator coolant hose ensures proper coolant flow and heat dissipation for vehicles like the Chevrolet C20 and GMC K3500.

• Constructed from high-quality EPDM for heat and chemical resistance
• Molded design for precise fit and secure connections
• End 1 inside diameter: 1.26 inches (32 mm)
• End 2 inside diameter: 1.5 inches (38 mm)
• Centerline length of 29.4 inches (747 mm)
• Compatible with multiple Chevrolet and GMC truck models
• Does not contain internal springs or quick connect fittings

About the Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates focuses on delivering hoses that are pre-formed to exact specifications, reducing installation time and improving coolant system reliability. This product line uses EPDM material known for its resistance to heat, ozone, and coolant chemicals, making it suitable for heavy-duty applications in trucks and SUVs. The molded construction ensures consistent shape and fitment, which is critical for maintaining proper coolant flow and preventing leaks.

Detailed Product Description

The Gates Molded Coolant Hose 21649 is a radiator coolant hose specifically designed for use in Chevrolet and GMC vehicles including the C20, C20 Suburban, C30, C2500, C2500 Suburban, C3500, K20 Suburban, K30, K3500, R30, and R3500 models. Made from EPDM, this hose offers excellent resistance to heat and coolant fluids, helping to maintain system integrity under demanding conditions. The molded design provides a precise fit with an inside diameter of 1.26 inches (32 mm) on one end and 1.5 inches (38 mm) on the other, with a centerline length of 29.4 inches (747 mm). This hose does not include springs or quick connect fittings, simplifying installation and reducing potential failure points.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in Chevrolet and GMC trucks
• Prevention of coolant leaks caused by hose degradation or improper fit
• Restoration of proper coolant flow to avoid engine overheating
• Addressing hose swelling or softening due to heat exposure
• Eliminating coolant contamination from hose material breakdown

Installation Notes and Tips

• Ensure the engine is cool before removing the old hose to prevent burns
• Check hose connections and clamps for corrosion or damage and replace if necessary
• Verify the correct orientation of the molded hose before installation
• Use proper tools to avoid damaging the hose or fittings during installation
• Inspect the cooling system for leaks after installation and during initial operation

Quality Assurance and Warranty

Gates Molded Coolant Hose 21649 is manufactured to meet or exceed OEM specifications for durability and performance. The EPDM material and molded construction provide resistance to heat, ozone, and coolant chemicals, ensuring long service life. 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.