Gates 21837 Radiator Coolant Hose - Lower or Upper

Overview of Gates Molded Coolant Hose 21837

The Gates Molded Coolant Hose 21837 is designed for reliable cooling system performance in select Chevrolet, INFINITI, Mazda, Mitsubishi, and Nissan vehicles. Engineered with EPDM material, this radiator coolant hose offers precise fitment and durability for models like the Chevrolet Corvette, Nissan Sentra, and Mazda MX-6.

• Constructed from durable EPDM material for heat and chemical resistance
• Molded design ensures exact fit and secure connections
• End 1 inside diameter: 1.25 inches (32 mm)
• End 2 inside diameter: 1.38 inches (35 mm)
• Centerline length of 22 inches (559 mm) for proper routing
• Contains no internal spring, providing consistent coolant flow
• Compatible with multiple vehicle makes and models

Details on the Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates focuses on precision-engineered radiator hoses that are molded to exact specifications. This approach eliminates the need for multiple hose clamps and reduces the risk of leaks. The molded construction of part number 21837 ensures a secure, leak-resistant fit tailored for specific vehicle applications, enhancing cooling system reliability.

Product Description and Specifications

Part number 21837 is a radiator coolant hose made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals. The hose features a molded design with two different inside diameters: 1.25 inches (32 mm) on one end and 1.38 inches (35 mm) on the other, accommodating specific radiator and engine connections. With a centerline length of 22 inches (559 mm), this hose is designed to fit the cooling system layout of vehicles such as the Chevrolet Corvette, Nissan Sentra, Mazda MX-6, Mitsubishi Diamante, and INFINITI G20 and NX models. The hose does not contain an internal spring, which helps maintain consistent coolant flow without restriction.

Common Applications and Problem Solving

• Replacement for cracked or leaking radiator coolant hoses
• Restores proper coolant flow in overheating vehicles
• Prevents coolant leaks caused by hose deterioration or swelling
• Ensures secure connections in cooling systems with molded hose requirements
• Addresses fitment issues in Chevrolet Corvette, Nissan Sentra, and Mazda MX-6 cooling systems

Installation Notes and Tips

• Verify compatibility with your vehicle make and model before installation
• Ensure all old hose clamps and fittings are removed and cleaned
• Use proper coolant system pressure testing after installation to check for leaks
• Do not reuse old clamps; use new clamps sized for the hose diameters
• Follow vehicle manufacturer torque specifications for hose clamps

Quality Assurance and Warranty

Gates Molded Coolant Hose 21837 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, 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 authorized distributors for exact warranty terms.