Stant 15259 Engine Coolant Thermostat / Water Outlet Assembly

Integrated Thermostat Housing for Ford and Mercury

Stant 15259 is an integrated thermostat housing assembly for select Ford and Mercury applications. It combines the thermostat and water outlet housing into one unit, helping simplify service on vehicles that use a 198-degree cooling specification.

Key Features

• Integrated thermostat housing assembly for streamlined replacement
• 198 degrees Fahrenheit thermostat rating
• Durable housing material for long service life
• Bypass plate diameter: 1.69 in.
• Flange diameter without seal: 2.629 in.
• Height from flange to bottom: 1 in.; height from flange to top of bridge: 0.78 in.

Product Details

This Stant Integrated Thermostat Housing line is built for cooling-system service where the thermostat is housed within the outlet assembly. That design reduces the number of separate components to manage during replacement and helps maintain the correct coolant flow and operating temperature. Part number 15259 is specified for 2001 Ford Explorer, 2001 Ford Ranger, 1998-2001 Mercury Mountaineer, and 1997-2000 Ford Explorer applications, including the 2001 Ford Explorer with a threaded temperature sensor note and the 23/07/2000 cutoff detail.

Stant 15259 is a direct-fit cooling system service part for drivers searching for a 198-degree thermostat housing for Ford Explorer, Ford Ranger, or Mercury Mountaineer models. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Repair Uses

• Replacing a leaking or warped thermostat housing
• Restoring proper engine coolant temperature control
• Addressing coolant seepage at the water outlet area
• Correcting thermostat-related overheating or slow warm-up concerns
• Servicing a worn integrated thermostat and housing assembly

Installation Notes

Verify the vehicle’s year, engine cooling configuration, and sensor style before installation. Match the 198-degree specification and confirm the flange and bypass dimensions against the original part. Clean the mating surfaces thoroughly and inspect the coolant passages, hoses, and temperature sensor connection during service.

Quality Assurance

Stant is known for cooling-system components, and this integrated thermostat housing is built from durable material for long-lasting service in the engine cooling system.