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CSF 3944 Radiator
| Brand | CSF 3944 |
|---|---|
| Core Thickness | 1 5/8 |
| Core Width | 20 5/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 33 3/8 |
| Inlet Diameter | 1 15/16 left |
| Outlet Diameter | 1 15/16 right |
| Down Flow Or Cross Flow Type | Cross flow |
| Box Height (in) | 8 1/4 |
| Box Length (in) | 44 5/8 |
| Box Weight (lbs) | 21 |
| Box Width (in) | 23 3/4 |
| Hazardous Material | No |
| Inlet Length (in) | 20 7/8 |
| Inlet Width (in) | 2 3/16 |
| No. Of Rows | 2 |
| Oil Cooler (in) | No |
| Outlet Length (in) | 20 7/8 |
| Outlet Width (in) | 2 3/16 |
| Radiator Cap Supplied | No |
| Tech Note | O.e.m. style plastic tank & aluminum core. upgraded heavy duty co |
| Fits | Ram · 12 vehicles |
Heavy-duty core. 17% thicker 2-row aluminum core improves cooling capacity.
Cross-flow design. Helps move coolant efficiently through the radiator.
OEM-style construction. Plastic tanks and aluminum core mirror the original layout.
Cross-references BBB Industries 13871, Mopar 68322491AA and Partslink Numbering System CH3010391 for the same application. See all 3.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Heavy-Duty Cooling for Ram 2500 and 3500
CSF 3944 is an OE-style radiator built with a plastic tank and aluminum core for 2019-2024 Ram 2500 and Ram 3500 trucks. It uses a 2-row cross-flow design with an upgraded heavy-duty core to improve cooling capacity over the original 1-row layout.
Fits 2019-2024 Ram 2500, N/A. Fits 2019-2024 Ram 3500, N/A.
Key Features
- Part number 3944 radiator for Ram heavy-duty truck applications
- OE-style plastic tank and aluminum core construction
- 2-row cross-flow design for increased cooling surface area
- 17% thicker 42mm core versus OEM 36mm 1-row core
- Left inlet and right outlet configuration
- Core dimensions: 33 3/8 in. length, 20 5/16 in. width, 1 5/8 in. thickness
- Manufactured by CSF, with ISO/TSO-certified factory processes
Detailed Description
CSF 3944 is engineered as a direct-fit radiator for Ram 2500 and Ram 3500 models from 2019 through 2024. The aluminum core and plastic tank design follows an OE-style layout while the upgraded heavy-duty 2-row core adds thickness for improved heat rejection in demanding towing, hauling, and daily driving conditions. This radiator is cross-flow configured with a 1 15/16 in. inlet on the left and a 1 15/16 in. outlet on the right. CSF states its radiators are developed to performance standards and validated through wind-tunnel testing, supporting consistent cooling performance across real-world use. This part cross-references Mopar 68322491AA and BBB Industries 13871 for the same application.
Common Issues This Radiator Can Address
- Overheating under load in Ram 2500 and Ram 3500 trucks
- Reduced cooling efficiency from a worn or clogged factory radiator
- Coolant temperature rise during towing or stop-and-go driving
- Leaks or tank deterioration associated with aging radiator assemblies
- Need for an OE-style replacement with a thicker heavy-duty core
Installation Notes and Tips
Verify radiator dimensions, inlet and outlet orientation, and vehicle application before installation. This radiator does not include a radiator cap. Inspect hoses, clamps, and surrounding cooling-system components during replacement to help ensure proper sealing and airflow. Confirm fitment for 2019-2024 Ram 2500 and 2019-2024 Ram 3500 before ordering.
Quality Assurance
CSF manufactures radiators in ISO/TSO-certified facilities 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 and performance cooling components.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2024 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2024 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2023 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2023 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2022 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2022 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2021 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2021 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2020 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2020 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2019 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
| 2019 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | Upgraded Heavy Duty 16% Stronger Core |
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