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Gates 51861 Radiator Coolant Hose - Lower, Lower - Engine To Tee or Outlet Tee To Connecting Pipe
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.
| Brand | Gates |
| Part Number | 51861 |
| Position | Molded Coolant Hose, Lower - Engine To Tee, Lower, and Outlet Tee To Connecting Pipe |
| Material | Epdm |
| End 1 Inside Diameter | 1.25 |
| End 1 Inside Diameter | 32 |
| End 2 Inside Diameter | 1.31 |
| End 2 Inside Diameter | 33 |
| Contains Spring | No |
| Centerline Length | 21.16 |
| Centerline Length | 537 |
| Branch Quantity | 0 |
| 9839 | Yes |
| 9845 | 0 |
| 9940 | No |
This part fits 15 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2025 | Cadillac | XT5 | 3.6L | V6 | GAS | Lower - Engine To Tee | Molded Coolant Hose |
| 2025 | Cadillac | XT6 | 3.6L | V6 | GAS | Lower - Engine To Tee | Molded Coolant Hose |
| 2022 | Chevrolet | Blazer | 3.6L | V6 | GAS | Lower | W/Trlr. Tow. Pkg.; Molded Coolant Hose |
| 2021 | Cadillac | XT5 | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2021 | Cadillac | XT6 | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2021 | Chevrolet | Blazer | 3.6L | V6 | GAS | Lower | W/Trlr. Tow. Pkg.; Molded Coolant Hose |
| 2021 | GMC | Acadia | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2020 | Cadillac | XT5 | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2020 | Cadillac | XT6 | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2020 | GMC | Acadia | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2019 | Chevrolet | Blazer | 3.6L | V6 | GAS | Lower | W/Trlr. Tow. Pkg.; Molded Coolant Hose |
| 2019 | GMC | Acadia | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2018 | GMC | Acadia | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2017 | GMC | Acadia | 3.6L | V6 | GAS | Lower | W/H.D. Cool.; Molded Coolant Hose |
| 2017 | GMC | Acadia Limited | 3.6L | V6 | GAS | Outlet Tee To Connecting Pipe | Molded 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.