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Four Seasons 85138 Engine Coolant Thermostat Housing
| Brand | Four Seasons 85138 |
|---|---|
| Bolt Hole Center To Bolt Hole Center | 3.438 |
| Description | Engine Coolant Components |
| Flange Thickness | 0.780 |
| Gasket Or Seal Included | Included |
| Inlet Port Diameter | 0.893 |
| Material | Thermoplastic |
| Meets / Exceeds OEM? | Yes |
| Overall Height IN | 2.286 |
| Style | w/o Thermostat |
| Symetrical Base? | No |
| Thermostat Included? | Not Included |
| Type | Thermostat Housing |
| Product line | Thermostat Housing |
| Fits | Ford and Mercury · 9 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for a dependable fit.
Thermoplastic construction. Helps resist heat and corrosion in the cooling system.
Gasket included. Ready for a cleaner, more complete installation.
Cross-references Four Seasons 85138, Motorad CH5677 and Valeo 815677 for the same application. See all 12.
Thermostat Housing for Ford Cooling Systems
Four Seasons 85138 is an engine coolant thermostat housing built for select Ford and Mercury applications. It is made from thermoplastic, includes a gasket or seal, and is supplied in a housing-only style with no thermostat included.
Use this Four Seasons thermostat housing when servicing cooling system leaks or replacing a cracked housing on a 1997-2000 Ford Explorer, 2001 Ford Explorer, 2001 Ford Ranger, or 1998-2000 Mercury Mountaineer. Four Seasons 85138 meets or exceeds OEM requirements for direct-fit cooling system service.
Key Features
- Thermoplastic thermostat housing for engine coolant service
- Gasket or seal included for installation
- Housing only; thermostat not included
- Meets or exceeds OEM specifications
- Inlet port diameter: 0.893 in.
- Bolt hole center to bolt hole center: 3.438 in.
- Flange thickness: 0.780 in.
- Overall height: 2.286 in.
Product Details
Four Seasons 85138 is a thermostat housing designed for cooling system repair where the original housing has warped, cracked, or begun leaking. The thermoplastic construction supports OE-style fitment, while the included seal helps simplify replacement. This part cross-references Motorad CH5677 for the same application.
Vehicle coverage includes 1997-2000 Ford Explorer, 2001 Ford Explorer with threaded sensor style and service note to 11/12/00, 2001 Ford Ranger with two threaded switch ports, and 1998-2000 Mercury Mountaineer. If you are searching for a Ford Explorer thermostat housing or a Ford Ranger coolant housing by part number 85138, this listing matches those service applications.
Common Repair Uses
- Replacing a leaking thermostat housing
- Repairing a cracked or heat-damaged coolant outlet
- Restoring proper coolant sealing at the thermostat housing
- Addressing coolant seepage around the housing flange
- Servicing cooling system components on Ford Explorer, Ford Ranger, and Mercury Mountaineer models
Installation Notes
Confirm the vehicle’s sensor and switch-port configuration before installation, especially on 2001 Ford Explorer and 2001 Ford Ranger applications. Inspect the mating surface, clean all coolant residue, and verify the gasket or seal seats evenly before tightening the housing. Replace worn hoses or damaged clamps during service to help maintain a reliable seal.
Quality Assurance
Four Seasons 85138 is built to meet or exceed OEM requirements for the listed applications. The Four Seasons thermostat housing line is intended for direct replacement service in cooling system repairs.
| Year | Make | Model | # Doors | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2001 | Ford | Explorer | 4 Door | 4.0L | V6 | N/A | Threaded Sensor Style; To 11/12/00; Thermostat Housing |
| 2001 | Ford | Ranger | — | 4.0L | V6 | N/A | w/ 2 Threaded Switch Ports; Thermostat Housing |
| 2000 | Ford | Explorer | — | 4.0L | V6 | N/A | Thermostat Housing |
| 2000 | Mercury | Mountaineer | — | 4.0L | V6 | N/A | Thermostat Housing |
| 1999 | Ford | Explorer | — | 4.0L | V6 | N/A | Thermostat Housing |
| 1999 | Mercury | Mountaineer | — | 4.0L | V6 | N/A | Thermostat Housing |
| 1998 | Ford | Explorer | — | 4.0L | V6 | N/A | Thermostat Housing |
| 1998 | Mercury | Mountaineer | — | 4.0L | V6 | N/A | Thermostat Housing |
| 1997 | Ford | Explorer | — | 4.0L | V6 | N/A | Thermostat Housing |
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