HomeBelts and Cooling > Hoses and PipesGates 21891 Radiator Coolant Hose
Part #: 21891

Gates 21891 Radiator Coolant Hose

Upper - Pipe To Radiator, Lower - Pipe To Engine, Lower - Radiator To Pipe, Lower - Engine To Pipe, Lower - Pipe To Radiator, Lower - Elbow To Thermostat, Upper - Radiator To Pipe, Lower - Pipe To Pipe, Lower - Cooler To Pipe, Upper - Engine To Pipe, Lower - Engine To Radiator, Lower - Pipe To Cooler, Lower - Radiator To Cooler, Lower - Pipe To Oil Cooler, Lower - Radiator To Pipe-1, Lower - Engine To Cooler, Upper - Pipe To Engine, Upper, Lower - Water Manifold To Pipe, Lower - Heat Exchanger To Pipe, Lower - Cooler To Radiator, Upper - Engine To Radiator, Lower, Lower - Oil Cooler To Pipe, and Lower - Pipe To Radiator (Left)
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$30.43Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Radiator Coolant Hose for Efficient Cooling

The Gates Molded Coolant Hose 21891 is engineered to provide dependable performance in your vehicle's cooling system. Designed with durable EPDM material and precise molded construction, this radiator coolant hose ensures a secure fit and long-lasting service.

  • Constructed from high-quality EPDM material for heat and chemical resistance
  • Molded design for exact fit and reduced risk of leaks
  • Contains internal spring reinforcement to prevent collapse under vacuum
  • 12.9 inches (328 mm) centerline length for accurate installation
  • Consistent 2.5 inch (64 mm) inside diameter on both ends for uniform flow

About the Gates Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates focuses on precision-engineered hoses that match OEM specifications. These hoses are molded to fit specific vehicle applications, reducing installation time and improving reliability. The 21891 part benefits from this product line's emphasis on durability and exact fitment, making it suitable for various automotive cooling systems requiring molded radiator hoses.

Detailed Product Description

This radiator coolant hose features EPDM construction, known for its resistance to heat, ozone, and coolant chemicals, which helps maintain hose integrity over time. The molded design ensures the hose maintains its shape and fits securely between radiator connections. An internal spring reinforcement prevents hose collapse during engine vacuum conditions, maintaining consistent coolant flow. With a centerline length of 12.9 inches (328 mm) and matching 2.5 inch (64 mm) inside diameters on both ends, the Gates 21891 hose is designed for precise fitment in compatible cooling systems.

Common Applications and Issues Addressed

  • Replacement of worn or cracked radiator coolant hoses
  • Prevention of coolant leaks due to hose deformation or failure
  • Maintaining proper coolant flow to avoid engine overheating
  • Addressing hose collapse under vacuum conditions
  • Ensuring secure connections in molded hose applications

Installation Notes and Tips

Ensure the cooling system is cool before removing the old hose to avoid burns. Verify the inside diameter and length match your vehicle’s specifications. The molded design of the Gates 21891 hose allows for straightforward installation without modification. Inspect hose clamps and replace if necessary to secure the hose properly. Check for any signs of wear or damage on adjacent components during installation.

Quality Assurance and Warranty

Gates is a recognized manufacturer of automotive hoses with stringent quality control standards. The Molded Coolant Hose 21891 is manufactured to meet or exceed OEM specifications. While specific warranty details are not provided here, Gates products typically come with a limited warranty against defects in materials and workmanship. Refer to Gates’ official documentation for exact warranty terms.

BrandGates
Part Number21891
MaterialEpdm
End 1 Inside Diameter2.5
End 1 Inside Diameter64
End 2 Inside Diameter2.5
End 2 Inside Diameter64
Contains SpringYes
Centerline Length12.9
Centerline Length328
Branch Quantity0
9839Yes
98450
Modular HoseNo
MoldedYes
Number of Quick Connect Fittings0

This part fits 0 vehicles. Search below:

YearMakeModelPositionNotes

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

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

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.