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CSF 3421 Radiator
| Brand | CSF 3421 |
|---|---|
| Box Height (in) | 7 |
| Box Length (in) | 33 |
| Box Weight (lbs) | 13 |
| Box Width (in) | 21 |
| Cap Included | No |
| Core Length | 25 7/8 |
| Core Material | Aluminum |
| Core Thickness | 15/16 |
| Core Width | 16 7/8 |
| Down Flow Or Cross Flow Type | Cross Flow |
| Hazardous Material | No |
| Inlet Diameter | 1 1/2 Left |
| Inlet Length (in) | 17 7/8 |
| Inlet Width (in) | 1 7/8 |
| Oil Cooler (in) | 9 7/8 (high-efficiency Plate Type) |
| Outlet Diameter | 1 1/2 Right |
| Outlet Length (in) | 17 7/8 |
| Outlet Width (in) | 1 7/8 |
| 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 | Ford, Mercury, and Lincoln · 17 vehicles |
OE-style design. Plastic tanks and an aluminum core match the original layout.
Cross-flow construction. Promotes efficient coolant flow through the radiator.
Wind tunnel tested. Validated for cooling performance in lab testing.
Cross-references APDI 8012856, OSC 2856 and Spectra Premium CU2856 for the same application. See all 5.
OE-Style Radiator for Fusion, Milan, and Zephyr
CSF 3421 is an OE-style radiator built with a 1-row aluminum core and plastic tanks for direct replacement cooling performance. It is engineered for the 2006-2009 Ford Fusion, 2006-2009 Mercury Milan, and 2006 Lincoln Zephyr, with cross-flow construction and factory-style inlet and outlet placement.
Key Features
- 1-row cross-flow radiator design
- Aluminum core with plastic tanks
- Core thickness: 15/16 in.
- Core dimensions: 25 7/8 in. length x 16 7/8 in. width
- Inlet diameter: 1 1/2 in., left side
- Outlet diameter: 1 1/2 in., right side
- High-efficiency plate-type oil cooler section
- OE-style plastic tank and aluminum core construction
- CSF 3421 radiator for direct-fit cooling system replacement
Product Details
CSF manufactures radiators to high-performance standards using ISO/TSO-certified factory processes and validated cooling designs. The CSF 3421 follows an OE-style layout with plastic tanks and an aluminum core, making it a practical replacement for the factory radiator in the Ford Fusion, Mercury Milan, and Lincoln Zephyr applications listed below. This part cross-references Spectra Premium CU2856 and APDI 8012856 for the same application.
Fits 2006-2009 Ford Fusion, N/A. Fits 2006-2009 Mercury Milan, N/A. Fits 2006 Lincoln Zephyr, N/A.
Common Cooling Issues This Radiator Can Address
- Cracked or leaking radiator tanks
- Restricted coolant flow from an aging core
- Overheating caused by reduced heat transfer
- Corrosion or internal wear in the original radiator
- Cooling system service needs on OE-style replacement applications
Installation Notes and Fitment Tips
Verify inlet and outlet orientation before installation: this radiator uses a left-side inlet and right-side outlet. Confirm core dimensions, hose connection size, and oil cooler configuration against the original unit before removal. The CSF 3421 is designed for direct replacement in the listed Ford Fusion, Mercury Milan, and Lincoln Zephyr model years.
Quality Assurance
CSF states that its radiators are engineered and wind-tunnel tested for cooling performance validation, with manufacturing supported by ISO/TSO-certified facilities. The brand has supplied radiators worldwide for decades and produces a broad range of OE-style cooling components.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2009 | Ford | Fusion | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2009 | Ford | Fusion | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2009 | Mercury | Milan | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2009 | Mercury | Milan | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2008 | Ford | Fusion | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2008 | Ford | Fusion | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2008 | Mercury | Milan | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2008 | Mercury | Milan | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2007 | Ford | Fusion | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2007 | Ford | Fusion | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2007 | Mercury | Milan | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2007 | Mercury | Milan | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2006 | Ford | Fusion | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2006 | Ford | Fusion | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2006 | Lincoln | Zephyr | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2006 | Mercury | Milan | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2006 | Mercury | Milan | 3.0L | V6 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
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