Part #: 3936

CSF 3936 Radiator

⚙️ 14 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ram, 2500 and 3500
🔄Easy Returns — Return within 60 days for a full refund
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Overview of CSF Radiator Part 3936 for Ram 2500 and 3500

The CSF radiator part number 3936 is designed specifically for Ram 2500 and 3500 models, providing reliable cooling performance. Featuring a cross flow design with an aluminum core and plastic tanks, this radiator supports efficient heat dissipation for heavy-duty applications.

  • Core thickness: 1 1/4 inches
  • Core width: 20 5/16 inches
  • Core length: 33 3/8 inches
  • Aluminum core material with plastic tanks
  • Inlet and outlet diameter: 1 15/16 inches (left inlet, right outlet)
  • Cross flow radiator type
  • Box dimensions: 44 5/8" length, 23 3/4" width, 8 1/4" height
  • Single row core design
  • Weight: 19 lbs

Detailed Product Description

This CSF radiator (part number 3936) is engineered with an OEM-style plastic tank and an upgraded heavy-duty aluminum core. The cross flow design enhances coolant flow efficiency, which is critical for maintaining optimal engine temperatures in Ram 2500 and 3500 trucks. The single-row core with a thickness of 1 1/4 inches balances cooling capacity and airflow, while the aluminum core material offers corrosion resistance and durability. Both the inlet and outlet have a diameter of 1 15/16 inches, positioned on the left and right sides respectively, ensuring compatibility with factory hose connections.

Applications and Common Issues Addressed

  • Replacement for damaged or leaking radiators in Ram 2500 and 3500 trucks
  • Resolves overheating caused by inefficient or clogged cooling systems
  • Addresses coolant leaks from cracked plastic tanks or corroded cores
  • Improves cooling performance in heavy-duty towing or hauling conditions
  • Suitable for restoring factory cooling system specifications

Installation Notes and Tips

When installing the CSF radiator 3936, ensure all hose connections match the 1 15/16 inch inlet and outlet diameters. The cross flow design requires proper orientation for optimal coolant flow, so verify inlet and outlet positions before installation. This radiator does not include a radiator cap, so reuse the existing cap or source a compatible replacement. Check for secure mounting points and inspect surrounding components for wear during installation.

Quality Assurance and Warranty

CSF radiators are manufactured to meet OEM specifications, using high-quality aluminum cores and durable plastic tanks. This radiator is designed for long-term reliability in Ram 2500 and 3500 trucks. While specific warranty details are not provided, CSF products typically come with manufacturer-backed quality assurance to support performance and durability.

BrandCSF
Part Number3936
Core Thickness1 1/4
Core Width20 5/16
Core MaterialAluminum
Tank MaterialPlastic
Core Length33 3/8
Inlet Diameter1 15/16 left
Outlet Diameter1 15/16 right
Down Flow Or Cross Flow TypeCross flow
Box Height (in)8 1/4
Box Length (in)44 5/8
Box Weight (lbs)19
Box Width (in)23 3/4
Hazardous MaterialNo
Inlet Length (in)20 7/8
Inlet Width (in)2 3/16
No. Of Rows1
Oil Cooler (in)No
Outlet Length (in)20 7/8
Outlet Width (in)2 3/16
Radiator Cap SuppliedNo
Tech NoteO.e.m. style plastic tank & aluminum core. upgraded heavy duty co

This part fits 14 vehicles. Search below:

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

* 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:

1389568322493AACH3010389

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.