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CSF 3791 Radiator
| Brand | CSF 3791 |
|---|---|
| Core Thickness | 7/8 |
| Core Width | 18 5/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 26 7/16 |
| Inlet Diameter | 1 3/8 right |
| Outlet Diameter | 1 3/8 left |
| Down Flow Or Cross Flow Type | Cross flow |
| Radiator Core Row Quantity | 1 |
| Cap Included | No |
| Box Height (in) | 6 7/8 |
| Box Length (in) | 35 3/8 |
| Box Weight (lbs) | 13 |
| Box Width (in) | 25 1/8 |
| Csf Cap Number | 4503 |
| Hazardous Material | No |
| Inlet Length (in) | 19 |
| Inlet Width (in) | 1 9/16 |
| Oil Cooler (in) | 14 9/16 (high-efficiency plate type) |
| Outlet Length (in) | 19 |
| Outlet Width (in) | 1 9/16 |
| Tech Note | O.e.m. style plastic tanks & aluminum core. |
| Product line | 1 Row Plastic Tank Aluminum Core |
| Fits | Kia · 8 vehicles |
OE-style construction. Plastic tanks and an aluminum core match the original design.
Cross-flow design. Promotes efficient coolant movement through the radiator.
Wind tunnel tested. Built and validated for cooling performance.
Cross-references Bosch 13520, OSC 13519 and Spectra Premium CU13519 for the same application. See all 8.
OE-Style Radiator for Kia Sorento
This CSF radiator is built for 2016-2020 Kia Sorento applications with an OE-style plastic tank and aluminum core design. It is engineered for direct replacement use in the cooling system, with cross-flow construction and integrated oil cooler provisions for the listed vehicle fitment.
Key Features
- Fits 2016-2020 Kia Sorento, N/A
- 1-row radiator design with a 7/8-inch core thickness
- Aluminum core with plastic tanks for OE-style construction
- Cross-flow layout with right-side inlet and left-side outlet
- High-efficiency plate-type oil cooler section measuring 14 9/16 inches
- No radiator cap included
- CSF part number 3791
Product Details
CSF 3791 is a replacement radiator designed around the factory-style layout used on the 2016-2020 Kia Sorento. The aluminum core and plastic tank construction follow an OE-style format, while the cross-flow design supports efficient coolant routing through the radiator assembly. Core dimensions measure 26 7/16 inches long by 18 5/16 inches wide, with a 7/8-inch thickness, and the unit uses 1 3/8-inch inlet and outlet connections.
CSF manufactures radiators to controlled production standards and validates cooling performance through laboratory wind tunnel testing. The brand supplies a wide range of radiator applications across many vehicle platforms, and this part reflects that OE-focused approach for Kia Sorento cooling system service. If you are replacing a worn or leaking radiator on a Kia Sorento, CSF 3791 provides a direct-fit solution for the listed model years.
This part cross-references Spectra Premium CU13519 and CU13520 for the same application.
Common Cooling System Issues
- Coolant leaks from cracked or aged radiator tanks
- Overheating caused by restricted coolant flow
- Corrosion or internal wear in the original radiator core
- Reduced cooling efficiency from a damaged oil cooler section
- Fitment problems when replacing a factory-style Kia Sorento radiator
Installation Notes and Tips
Verify inlet and outlet orientation before installation, since this radiator uses a right-side inlet and left-side outlet layout. Confirm all hose connections, mounting points, and transmission or oil cooler line routing against the original unit before final assembly. Flush the cooling system and inspect related hoses, clamps, and the radiator cap condition during replacement.
Quality Assurance
CSF states that its factories are ISO/TSO certified and that its radiators are engineered to high-performance standards. The brand also notes laboratory wind tunnel testing for cooling performance validation, supporting consistent production quality for the Kia Sorento application covered by part number 3791.
| Year | Make | Model | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2020 | Kia | Sorento | — | 3.3L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2019 | Kia | Sorento | — | 3.3L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2018 | Kia | Sorento | Automatic | 2.4L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2018 | Kia | Sorento | Automatic | 3.3L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2017 | Kia | Sorento | Automatic | 2.4L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2017 | Kia | Sorento | Automatic | 3.3L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2016 | Kia | Sorento | Automatic | 3.3L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2016 | Kia | Sorento | Automatic | 2.4L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
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