WMPHE Aluminum Thermostat Housing Kit for Ford Explorer 2002-2010 V6 4.0L — Direct-Fit, 198°F Thermostat

WMPHE 2L2Z8592BA is an aluminum replacement thermostat housing kit engineered to fit 2002–2010 Explorer and Mountaineer V6 4.0L engines, replacing brittle plastic housings for improved durability and coolant retention.

This replacement thermostat housing and thermostat assembly is designed as a direct-fit alternative to OE part numbers 2L2Z8592AA, 2L2Z8592BA, 2L2Z8592BB and 902-860. It pairs an upgraded aluminum housing with a thermostatic element rated to open at 198°F (92°C), offering a more heat- and cold-resistant option compared with the original plastic housings that can warp, crack, or leak over time. The kit is compatible with 2002–2010 Ford Explorer V6 4.0L, 2007–2010 Explorer Sport Trac V6 4.0L, and 2002–2010 Mercury Mountaineer V6 4.0L models.

How will an aluminum housing improve my vehicle's cooling system?

An aluminum housing resists deformation and thermal cycling better than factory plastic housings, helping to reduce the risk of coolant leaks and premature failure. Because it maintains shape under heat, gasket sealing surfaces remain more consistent and reliable over time.

• Aluminum construction reduces long-term warping and cracking.
• Improved heat resistance preserves gasket sealing integrity.
• Less prone to shrinkage and loosening during repeated heating cycles.

Is this a direct fit for my engine and which part numbers does it replace?

This WMPHE kit is engineered as a direct replacement for OE part numbers 2L2Z8592AA, 2L2Z8592BA, 2L2Z8592BB, and 902-860. It fits 4.0L V6 applications listed for the 2002–2010 Explorer, 2007–2010 Explorer Sport Trac, and 2002–2010 Mountaineer without modification when used with the correct vehicle configuration.

• Compatible with 2002–2010 Ford Explorer V6 4.0L.
• Compatible with 2007–2010 Explorer Sport Trac V6 4.0L.
• Compatible with 2002–2010 Mercury Mountaineer V6 4.0L.

What are the thermostat specifications and operating characteristics?

The included thermostat is calibrated to begin opening at 198°F (92°C), matching common OE thermal management targets for these V6 engines. It’s designed for reliable operation across typical automotive temperature ranges and to work with standard coolant mixtures used in Ford vehicles.

• Opening temperature: 198°F / 92°C.
• Designed for V6 4.0L engine cooling circuits.
• Constructed to resist sticking and deformation under heat.

What should I expect during installation and after-sales support?

Installation follows the same bolt pattern and hose connections as the original housing; common steps include draining coolant, removing the old housing, cleaning the mating surface, installing the new housing with a new gasket, and refilling the cooling system. WMPHE provides after-sales support if you have fitment questions or need help post-purchase.

• Direct-fit replacement—no custom drilling or modification typically required.
• Replace hoses or clamps if they show wear during installation.
• Contact WMPHE for product support and troubleshooting after purchase.

Who is this for: This aluminum thermostat housing kit is intended for owners and technicians working on 2002–2010 Ford Explorer, 2007–2010 Explorer Sport Trac, and 2002–2010 Mercury Mountaineer V6 4.0L vehicles who want a longer-lasting replacement for the OE plastic housing. It’s a practical upgrade for cars showing signs of coolant leakage, repeated overheating events tied to housing failure, or for anyone replacing a thermostat and seeking improved thermal stability and longevity.