Dorman 902-844 Engine Coolant Thermostat Housing - Upper
OE Quality 60-Day Returns
Dorman

Dorman 902-844 Engine Coolant Thermostat Housing - Upper

Brand Dorman 902-844
Position Upper
Air Vent (Bleeder Valve) No
Bolts Included No
Color Black
Gasket Or Seal Included No
Housing Neck Angle (┬░) 45 Degrees From Base
Material Plastic
Mounting Hole Diameter 0.25
Mounting Hole Quantity 3
O Rings Included Yes
Outlet Port Diameter 1
Package Contents Thermostat Housing with O-ring
Thermostat Included No
Fits Ford and Mercury · 12 vehicles

OE-style replacement. Matches stock fit and durability for a straightforward swap.

Plastic housing. Lightweight construction helps handle extreme temperature changes.

O-ring included. Ready for a tighter seal with the housing.

Cross-references AP Exhaust 7290, Four Seasons 85172 and Gates CO34762 for the same application. See all 7.

$45.09Free shipping
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Order total $45.09
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Engine Coolant Thermostat Housing options

Engine Coolant Thermostat Housing for Ford and Mercury

Dorman 902-844 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made from black plastic and engineered to handle repeated temperature swings in the cooling system.

Key Features

  • Direct replacement engine coolant thermostat housing
  • Black plastic construction
  • 1-inch outlet port diameter
  • 45-degree housing neck angle from base
  • Three mounting holes with 0.25-inch diameter
  • O-ring included; thermostat not included
  • No gasket or seal included
  • No bleeder valve and no bolts included

Detailed Description

This Dorman thermostat housing, part number 902-844, is designed for cooling system service on select Ford Explorer, Explorer Sport, Explorer Sport Trac, Ranger, and Mercury Mountaineer applications. It is a direct-fit replacement for the upper engine coolant thermostat housing and is built to match the stock housing’s fit and durability while resisting extreme temperature changes. This part cross-references Gates CO34762 and Motorad 5172KT for the same application.

Compatible With 1997-2001 Ford Explorer, upper; 2001 Ford Explorer Sport, upper; 2001 Ford Explorer Sport Trac, upper; 2001 Ford Ranger, upper; and 1998-2001 Mercury Mountaineer, upper. The Dorman 902-844 is a practical replacement when the original housing is cracked, warped, or leaking at the cooling system connection.

Common Problems This Part Can Address

  • Coolant leaks at the thermostat housing
  • Cracked or heat-damaged plastic housing
  • Warped sealing surface causing seepage
  • Cooling system service on upper thermostat housing locations
  • Fitment issues with worn original housing on Ford Explorer and Mercury Mountaineer models

Installation Notes and Tips

Verify the vehicle’s upper housing configuration, outlet size, and sensor style before installation. This housing does not include a thermostat, gasket or seal, or bolts, so reuse or replace related components as needed during service. Confirm the O-ring seats correctly and inspect mating surfaces for corrosion, debris, or old seal material before assembly.

Quality Assurance

Dorman designs this replacement housing to match the original part’s fit and durability for the listed applications and to withstand repeated temperature changes in normal cooling system operation.

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModel# DoorsLitersCylindersPositionNotes
2001FordExplorer4 Door4.0LV6UpperEngine coolant thermostat housing for cooling system.
2001FordExplorer Sport—4.0LV6UpperTo 7/23/00; Cover
2001FordExplorer Sport Trac—4.0LV6UpperTo 7/24/00; Cover
2001FordRanger—4.0LV6Upperw/Thread-In Style ECT Sensor; Cover
2001MercuryMountaineer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
2000FordExplorer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
2000MercuryMountaineer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
1999FordExplorer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
1999MercuryMountaineer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
1998FordExplorer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
1998MercuryMountaineer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
1997FordExplorer—4.0LV6UpperEngine coolant thermostat housing for cooling system.
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 7290Four Seasons — 85172Gates — CO34762Motorad — 5172KT815172F7TZ8594AKGT-7290