HomeBelts and Cooling > Thermostat and HousingGates CO34979 Engine Coolant Thermostat Housing Cover
Part #: CO34979

Gates CO34979 Engine Coolant Thermostat Housing Cover

Coolant Outlet
⚙️ 39 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Coolant Outlet
🚗Fitment: Ford, Mercury, Mazda, and Lincoln, Fusion, Milan, Escape, 6, Tribute, Mariner, Zephyr, and MPV
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Overview of Gates Coolant Outlet Thermostat Housing Cover CO34979

The Gates Coolant Outlet Engine Coolant Thermostat Housing Cover CO34979 is designed for reliable cooling system performance in select Ford, Lincoln, Mazda, and Mercury vehicles. This thermostat cover is engineered to maintain proper coolant flow and temperature regulation in your engine.

  • Constructed from durable plastic material for corrosion resistance
  • Features a 1.48 inch outlet outside diameter and 1.28 inch outlet inside diameter
  • Includes 3 bolt holes for secure mounting
  • Comes with one seal but no gaskets included
  • Compatible with Ford Escape, Fusion, Mariner, Lincoln Milan, Mazda MPV, Mercury Tribute, and Zephyr models

Detailed Product Description and Attributes

The Gates CO34979 thermostat housing cover is a plastic component designed to replace the original thermostat cover in your vehicle's cooling system. It has an outlet outside diameter of 1.48 inches and an inside diameter of 1.28 inches, ensuring proper coolant flow through the outlet. The cover is secured with three bolt holes, providing a stable and leak-resistant fit. This part includes one seal to help maintain a tight connection but does not come with any gaskets. It does not feature by-pass holes and is not an exact OE replacement, but it meets the necessary specifications for the compatible vehicle models.

About the Gates Coolant Outlet Product Line

The Gates Coolant Outlet line focuses on components that manage coolant flow and temperature regulation within the engine cooling system. This product line includes thermostat covers and related parts designed to fit specific vehicle applications, ensuring compatibility and reliable performance. The CO34979 thermostat housing cover is part of this line, providing a precise fit and function for select Ford, Lincoln, Mazda, and Mercury vehicles.

Common Applications and Issues Addressed

  • Replacement of cracked or damaged thermostat housing covers
  • Resolving coolant leaks around the thermostat housing
  • Maintaining proper coolant flow to prevent engine overheating
  • Addressing coolant contamination due to housing failure
  • Ensuring secure mounting with three-bolt design to prevent loosening

Installation Notes and Tips

  • Ensure the engine is cool before beginning installation to avoid burns
  • Clean the mounting surface thoroughly to remove old sealant or debris
  • Use the included seal and verify proper placement to prevent leaks
  • Tighten bolts evenly to the manufacturer’s torque specifications
  • Inspect connected hoses for wear or damage during installation

Quality Assurance and Warranty

Gates manufactures the CO34979 thermostat housing cover to meet industry standards for durability and fitment. While this part is not an exact OE replacement, it is engineered to provide reliable service in compatible Ford, Lincoln, Mazda, and Mercury models. Warranty information should be confirmed with the parts distributor or manufacturer, as it may vary by region and application.

BrandGates
Part NumberCO34979
PositionCoolant Outlet
1
No
Bolt Hole Quantity3
By-Pass HolesNo
ContentsThermostat Cover, Seal
Gasket Quantity0
MaterialPlastic
Number of Bolt Holes3
Number of Gaskets0
Number of Seals1
OE ExactNo
Outlet Inside Diameter1.28
Outlet Inside Diameter 1 (in)1.28
Outlet Outside Diameter1.48
Outlet Outside Diameter 1 (in)1.48
TypeThermostat Cover
TypeThermostat Cover

This part fits 39 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2009FordFusion3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2009MercuryMilan3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2008FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2008FordFusion3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2008Mazda63.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2008MazdaTribute3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2008MercuryMariner3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2008MercuryMilan3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2007FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2007FordFusion3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2007Mazda63.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2007MercuryMariner3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2007MercuryMilan3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006FordFusion3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006LincolnZephyr3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006Mazda63.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006MazdaMPV3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006MazdaTribute3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006MercuryMariner3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2006MercuryMilan3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2005FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2005Mazda63.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2005MazdaMPV3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2005MazdaTribute3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2005MercuryMariner3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2004FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2004Mazda63.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2004MazdaMPV3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2004MazdaTribute3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2003FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2003Mazda63.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2003MazdaMPV3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2003MazdaTribute3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2002FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2002MazdaMPV3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2002MazdaTribute3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2001FordEscape3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet
2001MazdaTribute3.0LV6GASN/AThermostat housing cover with included seal.; Coolant Outlet

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

81534785347902-1105AJ0315172AJ0315172AAJ0315172BAJ0315172CCH2105YL8Z 8K528 AAYL8Z 8K528 ADYL8Z 8K528 AE

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.