HomeBelts and Cooling > Hoses and PipesGates 51861 Radiator Coolant Hose - Lower, Lower - Engine To Tee or Outlet Tee To Connecting Pipe
Part #: 51861

Gates 51861 Radiator Coolant Hose - Lower, Lower - Engine To Tee or Outlet Tee To Connecting Pipe

Molded Coolant Hose, Lower - Engine To Tee, Lower, and Outlet Tee To Connecting Pipe
⚙️ 15 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Molded Coolant Hose, Lower - Engine To Tee, Lower, and Outlet Tee To Connecting Pipe
🚗Fitment: Cadillac, Chevrolet, and GMC, Acadia, Acadia Limited, Blazer, XT5, and XT6
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Reliable Radiator Coolant Hose for Cadillac, Chevrolet, and GMC

The Gates Molded Coolant Hose 51861 is engineered to provide dependable cooling system performance for select Cadillac, Chevrolet, and GMC models. Designed with precision and durable EPDM material, this radiator coolant hose ensures a secure fit and long-lasting service life.

  • Constructed from high-quality EPDM material for heat and chemical resistance
  • End 1 inside diameter: 1.25 inches (32 mm)
  • End 2 inside diameter: 1.31 inches (33 mm)
  • Centerline length of 21.16 inches (537 mm) for accurate fitment
  • Does not contain a spring, ensuring consistent flexibility and durability

About the Gates Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates focuses on precision-molded hoses designed to meet exact OEM specifications. These hoses are manufactured to provide reliable coolant flow and maintain system integrity under varying temperature and pressure conditions. The 51861 part is part of this line, offering a molded design that fits specific vehicle applications without the need for additional modifications.

Detailed Product Description

This radiator coolant hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. The hose features two different inside diameters at each end—1.25 inches (32 mm) and 1.31 inches (33 mm)—to accommodate specific radiator and engine connections. With a centerline length of 21.16 inches (537 mm), it is designed to fit the cooling systems of Cadillac Acadia, Acadia Limited, Chevrolet Blazer, and GMC XT5 and XT6 models precisely. The absence of a spring inside the hose allows for consistent flexibility and reduces the risk of internal damage or collapse.

Compatible Vehicles and Common Applications

  • Cadillac Acadia and Acadia Limited radiator coolant replacement
  • Chevrolet Blazer cooling system hose repair
  • GMC XT5 and XT6 radiator hose maintenance
  • Replacement for worn or cracked radiator coolant hoses
  • Addressing coolant leaks and overheating issues related to hose failure

Installation Notes and Tips

Ensure the engine is cool before removing the old hose to prevent burns or injury. Verify the hose orientation and connection points match the original part. Use proper clamps to secure the hose ends and check for leaks after installation. The molded design of the Gates 51861 hose simplifies installation by providing an exact fit for the specified vehicle models.

Quality Assurance and Warranty

Gates Molded Coolant Hoses are manufactured to meet or exceed OEM standards for durability and performance. The EPDM material offers resistance to heat and automotive fluids, contributing to a longer service life. While specific warranty details are not provided, Gates products typically come with manufacturer-backed quality assurance to support reliable operation in the vehicle's cooling system.

BrandGates
Part Number51861
PositionMolded Coolant Hose, Lower - Engine To Tee, Lower, and Outlet Tee To Connecting Pipe
MaterialEpdm
End 1 Inside Diameter1.25
End 1 Inside Diameter32
End 2 Inside Diameter1.31
End 2 Inside Diameter33
Contains SpringNo
Centerline Length21.16
Centerline Length537
Branch Quantity0
9839Yes
98450
9940No

This part fits 15 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2025CadillacXT53.6LV6GASLower - Engine To TeeMolded Coolant Hose
2025CadillacXT63.6LV6GASLower - Engine To TeeMolded Coolant Hose
2022ChevroletBlazer3.6LV6GASLowerW/Trlr. Tow. Pkg.; Molded Coolant Hose
2021CadillacXT53.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2021CadillacXT63.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2021ChevroletBlazer3.6LV6GASLowerW/Trlr. Tow. Pkg.; Molded Coolant Hose
2021GMCAcadia3.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2020CadillacXT53.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2020CadillacXT63.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2020GMCAcadia3.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2019ChevroletBlazer3.6LV6GASLowerW/Trlr. Tow. Pkg.; Molded Coolant Hose
2019GMCAcadia3.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2018GMCAcadia3.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2017GMCAcadia3.6LV6GASLowerW/H.D. Cool.; Molded Coolant Hose
2017GMCAcadia Limited3.6LV6GASOutlet Tee To Connecting PipeMolded Coolant Hose

* 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:

5186184006779F11571

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