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Dayco 72639 Radiator Coolant Hose - Lower or Lower - Engine To Oil Cooler
| Brand | Dayco 72639 |
|---|---|
| Position | Lower |
| Color | Black |
| Contains Protective Sleeve | Y |
| End 1 Inside Diameter | 1 1/2 |
| End 1 Outside Diameter | 1 7/8 |
| End 2 Inside Diameter | 1 1/2 |
| End 2 Outside Diameter | 1 7/8 |
| End 3 Inside Diameter | 5/8 |
| End 3 Outside Diameter | 5/8 |
| End 4 Inside Diameter | 5/8 |
| End 4 Outside Diameter | 5/8 |
| Hose Type | Branched Hose |
| Material | EPDM |
| SAE Specification | SAE J20R4 Class D-1, SAE J1684 Type EC |
| Trunk Height | 24 1/2 |
| Product line | Curved Radiator Hose |
| Fits | Ford and Lincoln · 23 vehicles |
Branched hose. Built with multiple branches for a clean coolant routing solution.
EPDM construction. Resists heat and coolant exposure for dependable service.
Protective sleeve included. Adds extra abrasion resistance where the hose needs it most.
Cross-references ACDelco 27008X, CARQUEST 23643 and Duralast E72639 for the same application. See all 13.
Dayco Curved Radiator Hose for Ford Applications
Dayco 72639 is a branched radiator coolant hose built for lower cooling-system routing on select Ford, Lincoln, and Ford Flex applications. Made from EPDM with a black finish and a protective sleeve, it is shaped for the curved routing used in oil cooler-equipped systems.
This curved radiator hose is listed for 2009-2019 Ford Flex, 2011-2019 Ford Explorer, and 2010-2012 Lincoln MKT applications with tow package or oil cooler configurations. If you are replacing a lower radiator hose on a Ford Explorer or Ford Flex, Dayco 72639 matches the specified OE-style routing and connection sizes.
Key Features
- EPDM construction for coolant-system service
- Black hose with a protective sleeve
- Branched hose design for lower engine cooling routing
- 1 1/2 in. inside diameter at End 1 and End 2
- 5/8 in. inside diameter at End 3 and End 4
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Curved radiator hose profile for listed Ford, Lincoln, and Ford Flex applications
Product Details
Dayco Curved Radiator Hose 72639 is engineered as a lower radiator coolant hose for vehicles that use a branched hose layout and oil cooler-related routing. The EPDM rubber construction is suited for coolant exposure, while the protective sleeve adds an extra layer where the hose passes near surrounding components. With a 24 1/2 in. trunk height and matched 1 1/2 in. and 5/8 in. connection sizes, this hose follows the specified fitment for the cooling system on select Ford Explorer, Ford Flex, and Lincoln MKT models.
This part cross-references Motorcraft KM4996 and Gates 23643 for the same application. Dayco 72639 is a direct-fit style replacement for owners searching for a lower radiator hose for 2011-2019 Ford Explorer, 2009-2012 Ford Flex, 2013-2019 Ford Flex, or 2010-2012 Lincoln MKT with the listed cooling-system configuration.
Common Cooling System Issues Addressed
- Cracked or split lower radiator hose
- Coolant leaks at branched hose connections
- Softening or deterioration from heat and age
- Incorrect hose routing on oil cooler-equipped systems
- Replacement needs after hose swelling or collapse
Installation Notes and Tips
Verify the vehicle’s engine cooling layout, tow package, and oil cooler configuration before ordering. Compare the hose shape, branch locations, and end diameters to the removed part to confirm Dayco 72639 matches the original routing. Inspect adjoining clamps, fittings, and coolant condition during replacement, and refill the system with the correct coolant after installation.
Quality Assurance
Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for radiator coolant hose applications. The part number 72639 is built for the specified OE-style fitment on listed Ford, Ford Flex, and Lincoln MKT cooling systems.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2019 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2019 | Ford | Flex | — | — | Lower - Engine To Oil Cooler | w/Tow Pkg.; Curved Radiator Hose |
| 2018 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2018 | Ford | Flex | — | — | Lower - Engine To Oil Cooler | w/Tow Pkg.; Curved Radiator Hose |
| 2017 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2017 | Ford | Flex | — | — | Lower - Engine To Oil Cooler | w/Tow Pkg.; Curved Radiator Hose |
| 2016 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2016 | Ford | Flex | — | — | Lower - Engine To Oil Cooler | w/Tow Pkg.; Curved Radiator Hose |
| 2015 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2015 | Ford | Flex | — | — | Lower - Engine To Oil Cooler | w/Tow Pkg.; Curved Radiator Hose |
| 2014 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2014 | Ford | Flex | — | — | Lower - Engine To Oil Cooler | w/Tow Pkg.; Curved Radiator Hose |
| 2013 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2013 | Ford | Flex | — | — | Lower - Engine To Oil Cooler | w/Tow Pkg.; Curved Radiator Hose |
| 2012 | Ford | Explorer | 3.5L | V6 | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2012 | Ford | Flex | — | — | Lower | w/Tow Pkg.; Curved Radiator Hose |
| 2012 | Lincoln | MKT | 3.7L | V6 | Lower | w/Tow Pkg.; Curved Radiator Hose |
| 2011 | Ford | Explorer | — | — | Lower | w/Oil Cooler; Curved Radiator Hose |
| 2011 | Ford | Flex | — | — | Lower | w/Tow Pkg.; Curved Radiator Hose |
| 2011 | Lincoln | MKT | 3.7L | V6 | Lower | w/Tow Pkg.; Curved Radiator Hose |
| 2010 | Ford | Flex | — | — | Lower | w/Tow Pkg.; Curved Radiator Hose |
| 2010 | Lincoln | MKT | 3.7L | V6 | Lower | w/Tow Pkg.; Curved Radiator Hose |
| 2009 | Ford | Flex | — | — | Lower | w/Tow Pkg.; Curved Radiator Hose |
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