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CSF 3861 Radiator
| Brand | CSF 3861 |
|---|---|
| Box Height (in) | 4 7/8 |
| Box Length (in) | 32 7/16 |
| Box Weight (lbs) | 9 |
| Box Width (in) | 19 1/4 |
| Cap Included | No |
| Core Length | 26 3/8 |
| Core Material | Aluminum |
| Core Thickness | 7/8 |
| Core Width | 15 7/8 |
| Down Flow Or Cross Flow Type | Cross Flow |
| Hazardous Material | No |
| Inlet Diameter | 1 1/2 Left |
| Inlet Length (in) | 16 9/16 |
| Inlet Width (in) | 1 3/8 |
| Oil Cooler (in) | 10 13/16 (high-efficiency Plate Type) |
| Outlet Diameter | 1 1/2 Right |
| Outlet Length (in) | 16 9/16 |
| Outlet Width (in) | 1 3/8 |
| Radiator Core Row Quantity | 1 |
| Tank Material | Plastic |
| Tech Note | O.E.M. style Plastic tanks & Aluminum core. |
| Product line | 1 Row Plastic Tank Aluminum Core |
| Fits | Toyota · 1 vehicle |
OE-style construction. Plastic tanks and aluminum core match the original design.
Cross-flow design. Promotes efficient coolant flow for consistent heat transfer.
Wind tunnel tested. Validated for cooling performance in lab conditions.
Cross-references Bosch 13685, Spectra Premium CU13685 and 16400-28591 for the same application. See all 4.
CSF 3861 Radiator for 2018 Toyota RAV4
The CSF 3861 is an OE-style radiator built for the 2018 Toyota RAV4 North America Built with Tow Package. It uses a 1-row plastic tank and aluminum core design with a cross-flow layout to support stable engine cooling in daily driving and towing conditions.
Key Features
- Fits 2018 Toyota RAV4, N/A, North America Built; w/ Tow Package
- 1-row radiator with plastic tanks and aluminum core
- Cross-flow design for efficient coolant routing
- Core thickness: 7/8 in.
- Core size: 26 3/8 in. length x 15 7/8 in. width
- Inlet: 1 1/2 in. left; outlet: 1 1/2 in. right
- Integrated high-efficiency plate-type oil cooler: 10 13/16 in.
- OE-style construction for direct replacement service
Product Details
CSF builds radiators to high-performance manufacturing standards and validates cooling performance through laboratory wind-tunnel testing. Part number 3861 follows an OE-style plastic tank and aluminum core layout, making it a direct-fit replacement for the 2018 Toyota RAV4 North America Built with Tow Package application. The cross-flow configuration, 1-row core, and plate-type oil cooler are designed to maintain consistent coolant flow and heat transfer in the factory cooling system.
This part cross-references Bosch 13685 and Spectra Premium CU13685 for the same application.
Common Cooling Issues Addressed
- Coolant leaks from a damaged or aging radiator
- Overheating caused by restricted heat transfer
- Reduced cooling performance under towing load
- Cracked or brittle plastic tank failure
- Corrosion or internal wear in the original radiator core
Installation Notes and Tips
Verify vehicle configuration before ordering: this radiator is for the 2018 Toyota RAV4 North America Built with Tow Package. Confirm inlet and outlet orientation, core dimensions, and oil cooler routing against the original unit before installation. Transfer and reconnect all factory cooling-system components according to service procedures, then refill and bleed the system to remove trapped air.
Quality Assurance
CSF manufactures radiators in ISO/TSO-certified facilities and supplies a broad range of cooling products worldwide. Part number 3861 is engineered and tested to support dependable replacement performance in the specified Toyota RAV4 application.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2018 | Toyota | RAV4 | 2.5L | L4 | N/A | North America Built; w/ Tow Package; 1 Row Plastic Tank Aluminum Core |
| No rows match your filter. | ||||||