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CSF 3947 Radiator
| Brand | CSF 3947 |
|---|---|
| Core Thickness | 1 1/4 |
| Core Width | 27 11/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 30 3/8 |
| Inlet Diameter | 1 7/8 left |
| Outlet Diameter | 1 7/8 right |
| Down Flow Or Cross Flow Type | Cross flow |
| Box Height (in) | 10 |
| Box Length (in) | 50 1/8 |
| Box Weight (lbs) | 20 |
| Box Width (in) | 32 3/16 |
| Hazardous Material | No |
| Inlet Length (in) | 28 3/8 |
| Inlet Width (in) | 2 3/16 |
| No. Of Rows | 1 |
| Oil Cooler (in) | 12 (high-efficiency round type) |
| Outlet Length (in) | 28 3/8 |
| Outlet Width (in) | 2 3/16 |
| Radiator Cap Supplied | No |
| Tech Note | O.e.m. style plastic tank & aluminum core with quick-connect inle |
| Fits | Ford · 18 vehicles |
OE-style replacement. Plastic tank and aluminum core match the original design.
Heavy-duty core. 15% thicker than OEM for improved cooling capacity.
Cross-flow design. Engineered for efficient coolant flow and heat transfer.
Cross-references Bosch 13717, Dixie Electric Ltd 13849 and Partslink Numbering System FO3010356 for the same application. See all 7.
CSF 3947 Radiator for Ford Super Duty
CSF 3947 is a direct-fit radiator built for 2017-2025 Ford F-250 Super Duty and Ford F-350 Super Duty applications. It uses an aluminum core with plastic tanks and a cross-flow design to match OE-style packaging while adding an upgraded heavy-duty core for added cooling capacity.
Key Features
- OE-style plastic tank and aluminum core construction
- Cross-flow radiator design
- 1-row core with 1 1/4 in. core thickness
- Quick-connect inlet and outlet pipe connections
- Quick-connect oil cooler fittings with 12 in. high-efficiency round type cooler
- Inlet: 1 7/8 in. left; outlet: 1 7/8 in. right
- Upgraded heavy-duty core, 15% thicker at 31 mm versus OEM 27 mm
- Part number: CSF 3947
Detailed Description
CSF 3947 radiator is engineered for Ford Super Duty cooling systems that require an OE-style replacement with updated core construction. The aluminum core and plastic tank layout follows factory-style fitment, while the thicker heavy-duty core is designed to improve cooling performance under demanding towing, hauling, and daily driving conditions. This radiator is a strong match for owners searching for a Ford F-250 Super Duty radiator or Ford F-350 Super Duty radiator replacement with factory-style connections and integrated oil cooler fittings. CSF has manufactured radiators for decades and validates cooling performance through laboratory wind tunnel testing. This part cross-references Bosch 13717 for the same application.
Common Problems This Radiator Helps Address
- Overheating caused by a worn or restricted radiator core
- Coolant leaks from aging plastic tank and core assemblies
- Reduced cooling efficiency during towing or heavy-load use
- Fitment issues when replacing a damaged OE-style radiator
- Oil cooler connection concerns on factory-equipped cooling systems
Installation Notes and Tips
Verify inlet and outlet orientation before installation: inlet is on the left and outlet is on the right. Confirm the vehicle uses the factory-style quick-connect coolant and oil cooler connections shown in the specifications. Inspect hoses, clamps, and surrounding cooling components before installing the new radiator to help prevent repeat service. This radiator is listed for 2017-2025 Ford F-250 Super Duty and 2017-2025 Ford F-350 Super Duty applications.
Quality Assurance
CSF manufactures radiators to ISO/TSO-certified factory standards and validates cooling performance during development. The brand has supplied radiators worldwide for more than 50 years and produces a broad range of OE-style cooling components for major vehicle platforms.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2025 | Ford | F-250 Super Duty | 6.8L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2025 | Ford | F-350 Super Duty | 6.8L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2024 | Ford | F-250 Super Duty | 6.8L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2024 | Ford | F-350 Super Duty | 6.8L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2023 | Ford | F-250 Super Duty | 7.3L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2023 | Ford | F-350 Super Duty | 6.8L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2022 | Ford | F-250 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2022 | Ford | F-350 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2021 | Ford | F-250 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2021 | Ford | F-350 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2020 | Ford | F-250 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2020 | Ford | F-350 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2019 | Ford | F-250 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2019 | Ford | F-350 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2018 | Ford | F-250 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2018 | Ford | F-350 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2017 | Ford | F-250 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
| 2017 | Ford | F-350 Super Duty | 6.2L | V8 | N/A | Upgraded Heavy Duty Core. 15% Thicker 31mm vs OEM 27mm |
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