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CSF 3979 Radiator
CSF 3979 Heavy Duty Radiator
The CSF 3979 radiator is an OE-style replacement built with an aluminum core and plastic tanks for 2023-2026 Ford F-250 Super Duty and Ford F-350 Super Duty applications. It features a 2-row cross-flow design with a thicker core than the original equipment setup, helping support cooling performance in demanding truck use.
Key Features
- Aluminum core with plastic tank construction
- 2-row cross-flow radiator design
- Core thickness: 1 5/8 in.
- Core size: 39 3/8 in. length x 20 11/16 in. width
- 1 1/4 in. left inlet and 1 1/4 in. left outlet
- OE-style quick-connect inlet and outlet pipe design
- No radiator cap supplied
- Cross-reference: Ford PC3Z 8005 A
Detailed Description
Built for 2023-2026 Ford F-250 Super Duty and 2023-2026 Ford F-350 Super Duty trucks, the CSF 3979 radiator uses an aluminum core with plastic tanks in an OEM-style layout. The cross-flow configuration and 2-row core provide a heavy-duty cooling solution, while the 42 mm core design is listed as 24% thicker than the OEM 1-row 34 mm core. CSF manufactures radiators to high-performance standards and validates cooling performance through wind tunnel testing, with production experience across a wide range of vehicle applications. This part number, CSF 3979, is a direct-fit radiator choice for Super Duty owners seeking a replacement that matches the factory-style connection layout.
Common Reasons to Replace
- Cracked or leaking radiator tanks
- Restricted coolant flow from an aging core
- Overheating under towing or heavy-load conditions
- Damaged inlet or outlet connections
- Cooling system service on a Ford F-250 Super Duty or Ford F-350 Super Duty
Installation Notes
Verify inlet and outlet orientation before installation; this radiator uses left-side inlet and outlet connections. Confirm dimensions, hose routing, and mounting points against the original radiator before removal. Transfer any vehicle-specific components as required by the application, and inspect hoses, clamps, and coolant condition during service.
Quality Assurance
CSF states that its factories are ISO/TSO certified and that its radiators are engineered and tested for cooling performance validation. The brand has supplied radiators worldwide for more than 50 years and offers a broad catalog of radiator applications for leading vehicle platforms.
| Brand | CSF |
| Part Number | 3979 |
| Core Thickness | 1 5/8 |
| Core Width | 20 11/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 39 3/8 |
| Inlet Diameter | 1 1/4 left |
| Outlet Diameter | 1 1/4 left |
| Down Flow Or Cross Flow Type | Cross flow |
| Box Height (in) | 6 5/8 |
| Box Length (in) | 47 9/16 |
| Box Weight (lbs) | 27 |
| Box Width (in) | 24 15/16 |
| Hazardous Material | No |
| Inlet Length (in) | 21 3/8 |
| Inlet Width (in) | 2 1/8 |
| No. Of Rows | 2 |
| Oil Cooler (in) | No |
| Outlet Length (in) | 21 3/8 |
| Outlet Width (in) | 2 1/8 |
| Radiator Cap Supplied | No |
| Tech Note | O.e.m. style plastic tank & aluminum core with quick-connect inl |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2026 | Ford | F-250 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
| 2026 | Ford | F-350 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
| 2025 | Ford | F-250 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
| 2025 | Ford | F-350 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
| 2024 | Ford | F-250 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
| 2024 | Ford | F-350 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
| 2023 | Ford | F-250 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
| 2023 | Ford | F-350 Super Duty | 6.7L | V8 | DIESEL | N/A | Upgraded Heavy Duty Core. 24% Thicker, 2 Row 42mm core vs OEM 1 Row 34mm core |
* 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.