Dorman 902-860 Engine Coolant Thermostat Housing Assembly

Dorman 902-860 Thermostat Housing Assembly

Dorman 902-860 is a replacement engine coolant thermostat housing assembly for select Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer models. It is built to match the original housing’s fit and durability, with materials selected to handle repeated temperature swings in the cooling system.

Key Features

• Plastic thermostat housing assembly in black finish
• Includes thermostat with a 190 Deg. F. opening temperature
• Gasket included for sealing at installation
• Three mounting holes and three outlet ports
• Upper housing, lower housing, thermostat, gasket, bolts, sensor plug, and sensor clip included in the package contents
• Fits 2002-2010 Ford Explorer, w/Cover
• Fits 2007-2010 Ford Explorer Sport Trac, w/Cover
• Fits 2002-2010 Mercury Mountaineer, w/Cover

Detailed Description

This engine coolant thermostat housing assembly is engineered as a direct replacement for the stock housing used on select 2002-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, and 2002-2010 Mercury Mountaineer applications. Dorman 902-860 is designed to restore proper coolant routing and thermostat function while matching the original housing layout, including the plastic construction, three-port design, and integrated thermostat setup. This part cross-references Gates (e.g., 7295, CO34739) for the same application.

Common Problems This Part Can Address

• Cracked or warped thermostat housing
• Coolant leaks at the housing or gasket surface
• Improper thermostat operation from a worn housing assembly
• Cooling system temperature control issues caused by a damaged housing
• Sensor connection problems related to a broken housing or clip

Installation Notes and Tips

Confirm the vehicle’s engine configuration and housing style before ordering, since this part is listed for plastic housing applications with cover. Inspect the mating surfaces, coolant passages, and related sensors before installation. Replace any damaged seals or connectors during service, and refill and bleed the cooling system according to the vehicle manufacturer’s procedure after installation.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match the fit and durability of the original stock unit and to withstand extreme temperature changes for extended service life. Part number 902-860 is built for direct replacement use on the listed Ford and Mercury applications.