CSF 3936 Radiator
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CSF

CSF 3936 Radiator

Brand CSF 3936
Core Thickness 1 1/4
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) 19
Box Width (in) 23 3/4
Hazardous Material No
Inlet Length (in) 20 7/8
Inlet Width (in) 2 3/16
No. Of Rows 1
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 · 14 vehicles

OE-style replacement. Plastic tank and aluminum core match the original design.

Heavy-duty core. 11% thicker than OEM for improved cooling performance.

Cross-flow design. Engineered for efficient airflow and cooling validation.

Cross-references BBB Industries 13895, Mopar 68322493AA and Partslink Numbering System CH3010389 for the same application. See all 3.

$171.16Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
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Step 2 — Quantity
Order total $171.16
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Heavy-Duty Radiator for Ram 2500 and 3500

CSF 3936 is an OE-style radiator built with an aluminum core and plastic tanks for 2019-2025 Ram 2500 and 2019-2025 Ram 3500 applications. It uses a cross-flow design with a 1-row core and an upgraded heavy-duty core that is 11% thicker than the OEM 27mm unit.

Key Features

  • Fits 2019-2025 Ram 2500, N/A
  • Fits 2019-2025 Ram 3500, N/A
  • Aluminum core with plastic tank construction
  • Cross-flow radiator design
  • Core thickness: 1 1/4 in.
  • Core dimensions: 33 3/8 in. length, 20 5/16 in. width
  • Inlet diameter: 1 15/16 in., left side
  • Outlet diameter: 1 15/16 in., right side
  • Upgraded heavy-duty core for added cooling capacity
  • Wind tunnel tested for cooling performance validation

Product Details

CSF 3936 is engineered as a direct radiator replacement for Ram 2500 and Ram 3500 trucks that need OE-style fitment with a heavier-duty core design. CSF manufactures radiators to performance standards used across a wide range of vehicle applications, and this unit reflects that approach with an aluminum core, plastic tanks, and a cross-flow layout sized for the listed Ram fitments. This part cross-references Mopar 68322493AA and BBB Industries 13895 for the same application.

Common Cooling Issues It Can Address

  • Leaking radiator tanks or core seams
  • Restricted coolant flow from an aging radiator
  • Reduced cooling efficiency under towing or heavy-load use
  • Overheating caused by a worn OE radiator
  • Cooling system service needs on Ram 2500 and Ram 3500 trucks

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet orientation, and vehicle fitment before installation. This radiator does not include a radiator cap, and the listing notes no oil cooler. Inspect hoses, clamps, and coolant condition during replacement to help ensure proper system operation. Confirm the truck is one of the listed 2019-2025 Ram 2500 or Ram 3500 applications before ordering CSF 3936.

Quality Assurance

CSF states that its radiators are manufactured in ISO/TSO-certified facilities and validated through laboratory testing for cooling performance. The brand has supplied radiators worldwide for more than 50 years and produces a broad catalog of radiator models for leading vehicle platforms.

Related reading

This part fits 14 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2025Ram25006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2025Ram35006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2024Ram25006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2024Ram35006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2023Ram25006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2023Ram35006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2022Ram25006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2022Ram35006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2021Ram25006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2021Ram35006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2020Ram25006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2020Ram35006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2019Ram25006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2019Ram35006.4LV8N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 13895Mopar — 68322493AAPartslink Numbering System — CH3010389