Dorman 902-778 | Engine Coolant Thermostat Housing

Part Number
Engine Coolant Thermostat Housing

Fits: 02-06 Mazda MPV, 03-08 Mazda 6, 05-08 Ford Escape, 05-06 Mazda Tribute, 05-08 Mercury Mariner, 06-09 Ford Fusion, 06 Lincoln Zephyr, 08-11 Mazda Tribute, 06-09 Mercury Milan

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Estimated Ship Date: 1 Business Day or Less

This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.

BRAND: Dorman - OE Solutions


  • Engine, Coolant, Thermostat, Housing, Thermostats, Housings
  • Cost-effective and reliable - offers original manufacturer quality at lower cost than getting replacement at dealer
  • Industry-leading design - professionally engineered by the aftermarket leader in replacement thermostat housings
  • Engine Coolant Thermostat Housing
  • Durable construction - this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
  • Ford 2009-05, Lincoln 2006, Mazda 2011-02, Mercury 2009-05
  • Ideal replacement - this engine coolant thermostat housing directly replaces the original housing on specified vehicle years, makes and models


Air Vent (Bleeder Valve)No
Bolts IncludedNo
Gasket Or Seal IncludedYes
Housing Neck Angle (°)90
Mounting Hole Diameter0.188
Mounting Hole Quantity3
O Rings IncludedNo
Outlet Port Diameter1.5
Package ContentsThermostat Housing with Gasket
Thermostat IncludedNo




  • MOTORAD: CH8778
  • Ford: 2M5Z8592CD
  • Skyward Automotive Products LLC: SK902778
  • CARTEK: 7288
  • KNADIAN: TF288
  • QUEZADA: 7288
  • Varese: 7288


  • 2005-2008 Ford Escape - Position: Inner
  • 2006-2009 Mercury Milan - Position: Inner
  • 2005-2008 Mercury Mariner - Position: Inner
  • 2006-2006 Lincoln Zephyr - Position: Inner
  • 2002-2006 Mazda MPV - Position: Inner
  • 2005-2006 Mazda Tribute - Position: Inner
  • 2003-2008 Mazda 6 - Position: Inner
  • 2006-2009 Ford Fusion - Position: Inner
  • 2008-2011 Mazda Tribute - Position: Inner
Customer Questions
Can I use Dorman parts to replace OEM parts?
Yes, Dorman parts can often be used as replacements for OEM parts, but it is important to carefully compare specifications and ensure compatibility.
How do I install Dorman shift linkage bushing?
To install a Dorman shift linkage bushing, first locate the old bushing and remove it if necessary. Apply lubricant to the Dorman bushing and slide it onto the shift linkage, tapping it into place with a soft tool until fully seated. Check the alignment and function of the shift linkage after installation.
Where is Dorman manufactured?
Dorman is a global automotive parts supplier with manufacturing facilities in the United States, Mexico, Canada, China, and India. Its headquarters and largest manufacturing facility are located in Colmar, Pennsylvania, USA.
When to replace the engine coolant thermostat?
The engine coolant thermostat should be replaced if it is not functioning properly or as a preventive maintenance measure after a certain mileage or time interval.
What is an engine coolant thermostat?
An engine coolant thermostat is a component that regulates the flow of coolant through the engine to maintain optimal operating temperature.
Will the engine coolant temperature sensor keep the car from starting?
In most cases, a malfunctioning engine coolant temperature sensor (ECT sensor) will not prevent the car from starting. The engine coolant temperature sensor (ECT sensor) is responsible for monitoring the temperature of the engine coolant and sending that information to the engine control unit (ECU). The ECU uses this information to make adjustments to the fuel mixture and ignition timing for optimal engine performance.
Does PartsHawk carry an engine coolant thermostat for Mazda 6?
Yes, PartsHawk carries an Engine Coolant thermostat for Mazda 6
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