Dorman 902-1999 Engine Coolant Thermostat Housing Assembly

Dorman 902-1999 Thermostat Housing Assembly

Dorman 902-1999 is an engine coolant thermostat housing assembly built with an aluminum housing to replace weak plastic OE designs. It is made for Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer applications where the original housing can warp, crack, or leak over time.

This OE FIX replacement uses a metal construction and includes a gasket or seal with an O-ring style seal for a more secure coolant connection. The silver aluminum housing features three mounting holes, three outlet ports, and a 1.32-inch inside diameter.

Key Features

• Aluminum thermostat housing assembly in silver finish
• OE FIX design replaces plastic housing with metal construction
• Gasket or seal included; O-ring gasket type
• Three mounting holes and three outlet ports
• Package contents include thermostat housing, hose, and clamps
• Thermostat opening temperature: 120 degrees
• Cross-reference part numbers include Dorman OE Solutions 902-860 and Motorad CH2860

Detailed Description

This thermostat housing assembly is engineered for 2002-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, and 2002-2010 Mercury Mountaineer models with the metal housing and cover configuration. Dorman 902-1999 addresses a common failure point in the cooling system by replacing plastic construction with aluminum, helping reduce warping at the housing and sealing surface.

Use this part when servicing the coolant outlet area on Ford Explorer and Mercury Mountaineer vehicles that need a direct-fit thermostat housing assembly. The part number 902-1999 is also a useful reference when searching for a thermostat housing replacement for 2002-2010 Ford Explorer or 2007-2010 Ford Explorer Sport Trac cooling system repairs.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Warped or cracked plastic housing surfaces
• Failed sealing at the O-ring interface
• Cooling system service issues on Ford Explorer and Mercury Mountaineer models
• Repeated thermostat housing replacement caused by weak OE plastic construction

Installation Notes and Tips

Verify the vehicle uses the metal housing with cover configuration before ordering. This assembly does not include mounting hardware, and the thermostat is not included. Inspect the hose connection points, sealing surfaces, and adjacent coolant lines during installation to help ensure a proper seal.

For fitment, this part fits 2002-2010 Ford Explorer, N/A; 2007-2010 Ford Explorer Sport Trac, N/A; and 2002-2010 Mercury Mountaineer, N/A.

Quality Assurance

Dorman OE FIX parts are developed as upgraded replacements for common OE failure points. Part number 902-1999 follows that approach by changing the housing material from plastic to aluminum for improved durability in the cooling system.