CSF 3666 Radiator

OE-Style Cooling Replacement

CSF radiator part number 3666 is an OE-style replacement built with a 1-row aluminum core and plastic tanks. It is engineered for direct-fit cooling performance on select Ford Explorer, Ford Flex, and Lincoln MKT applications.

The CSF 1 Row Plastic Tank Aluminum Core line focuses on factory-style construction with application-specific dimensions and cross-flow design. For buyers searching for a Ford Explorer radiator or a Ford Flex radiator replacement, CSF 3666 delivers the core layout and hose connections needed for the listed vehicles.

Key Features

• Part number 3666
• 1-row cross-flow radiator design
• Aluminum core with plastic tanks
• Core thickness: 1 1/4 in.
• Core size: 19 in. wide x 28 3/4 in. long
• Inlet: 1 1/2 in. right side
• Outlet: 1 1/2 in. left side
• OE-style plastic tank and aluminum core construction
• Cap not included

Detailed Description

CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind-tunnel testing. The brand supplies a wide range of radiator applications worldwide, and this CSF 3666 unit follows that OE-style approach with a plastic tank and aluminum core layout that matches the factory configuration for the listed vehicles.

This radiator is a direct-fit choice for 2011-2019 Ford Explorer, 2013-2019 Ford Flex, and 2013-2018 Lincoln MKT applications shown below. It is also referenced by part number 3666 for easy catalog matching when replacing an original radiator on these platforms.

This part cross-references APDI 8013364 and Carlson 13364 for the same application.

What It Helps Address

• Leaking or cracked radiator tanks
• Restricted coolant flow from an aging core
• Overheating caused by radiator deterioration
• Corrosion or wear in the original cooling assembly
• Replacement needs after coolant system service on OE-style setups

Installation Notes

• Verify inlet and outlet orientation before installation: 1 1/2 in. right inlet and 1 1/2 in. left outlet.
• Confirm the vehicle uses the listed OE-style cross-flow configuration.
• Check for engine oil cooler and power take-off notes in the fitment list before ordering.
• Inspect hoses, clamps, and coolant condition during radiator replacement.
• Use the listed fitment notes to match the correct Ford Explorer, Ford Flex, or Lincoln MKT application.

Quality Assurance

CSF radiators are manufactured in ISO/TSO-certified facilities and built to application-specific standards. The brand’s testing process includes laboratory validation for cooling performance, supporting consistent OE-style fitment and function on the listed vehicles.

• Fits 2016-2019 Ford Explorer, N/A; OE Style Design; w/o Power Take-Off; w/ Engine Oil Cooler; FWD; 1 Row Plastic Tank Aluminum Core
• Fits 2013-2019 Ford Flex, N/A; OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
• Fits 2013-2018 Lincoln MKT, N/A; OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
• Fits 2013-2015 Ford Explorer, N/A; OE Style Design; w/ Power Take-Off; w/o Power Take-Off, w/ Engine Oil Cooler; w/o Power Take-Off, w/o Engine Oil Cooler, Limited Model; 1 Row Plastic Tank Aluminum Core
• Fits 2012 Ford Explorer, N/A; OE Style Design; w/ Power Take-Off; w/o Power Take-Off, w/ Engine Oil Cooler; 1 Row Plastic Tank Aluminum Core
• Fits 2011 Ford Explorer, N/A; OE Style Design; w/ Power Take-Off; From 4/4/11; w/o Power Take-Off, w/ Engine Oil Cooler; 1 Row Plastic Tank Aluminum Core