CSF 3633 Radiator

OE-Style Radiator for Ford and Lincoln

CSF 3633 is an OE-style replacement radiator built with a plastic tank and aluminum core for controlled cooling performance. It is engineered for direct-fit service on select Ford Flex, Lincoln MKT, and Ford Explorer applications with the correct inlet and outlet sizing.

The CSF 1 Row Plastic Tank Aluminum Core line focuses on factory-style construction and validated cooling performance. CSF designs and tests its radiators for real-world thermal control, making this radiator a practical choice for drivers replacing a worn or leaking original unit.

Key Features

• Part number: 3633
• 1-row cross-flow radiator design
• Plastic tank and aluminum core construction
• Core thickness: 7/8 in.
• Core width: 19 in.; core length: 28 11/16 in.
• Inlet diameter: 1 1/2 in. and 1 1/16 in. right
• Outlet diameter: 1 1/2 in. left
• OE-style plastic tanks and aluminum core
• Cap not included

Detailed Description

CSF radiator 3633 is designed for factory-style cooling system replacement in 2009-2012 Ford Flex, 2010-2012 Lincoln MKT, and 2011 Ford Explorer models with tow package through 4/4/11. The cross-flow layout, single-row core, and OE-style tank construction support proper fitment and thermal transfer in applications that require a direct replacement radiator. CSF manufactures a wide range of radiator models and validates cooling performance through laboratory testing, with production standards backed by ISO/TSO-certified factories.

This part cross-references Spectra Premium CU13185 and TYC 13185 for the same application.

What It Helps Address

• Coolant leaks from cracked or aging radiator tanks
• Restricted cooling performance from a clogged or corroded core
• Overheating caused by a failing original radiator
• Fitment issues when replacing an OE-style radiator assembly
• Cooling system service needs on Ford Flex, Lincoln MKT, and Ford Explorer vehicles

Installation Notes and Tips

Verify inlet and outlet orientation before installation, especially on Ford Flex and Lincoln MKT applications. Confirm vehicle year and, for the 2011 Ford Explorer, tow package and build date through 4/4/11 before ordering. Inspect hoses, clamps, and coolant condition during radiator replacement to help ensure a clean installation and proper system operation.

Quality Assurance

CSF builds radiators to high-performance standards and tests designs for cooling performance validation. The brand has supplied radiators worldwide for more than 50 years and manufactures a broad catalog of OE-style replacement applications.