HomeBelts and Cooling > Thermostat and HousingGates CO35025 Engine Coolant Thermostat Housing
Part #: CO35025

Gates CO35025 Engine Coolant Thermostat Housing

Coolant Outlet
⚙️ 22 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: Mazda, 626, MX-6, Protege, and Protege5
🔄Easy Returns — Return within 60 days for a full refund
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Overview of Gates Coolant Outlet Thermostat Housing CO35025

The Gates Coolant Outlet Engine Coolant Thermostat Housing CO35025 is designed for reliable cooling system performance in select Mazda vehicles. Engineered from durable aluminum, this thermostat housing ensures proper coolant flow and temperature regulation for Mazda 626, MX-6, Protege, and Protege5 models.

  • Constructed from corrosion-resistant aluminum material
  • Exact OE replacement for precise fit and function
  • Features two bolt holes for secure mounting
  • Outlet outside diameter: 1.18 inches; inside diameter: 0.87 inches
  • Compatible with Mazda 626, MX-6, Protege, and Protege5

About the Gates Coolant Outlet Product Line

The Gates Coolant Outlet line focuses on high-quality thermostat housings and related cooling components designed to meet or exceed original equipment specifications. This product line emphasizes durability and exact fitment, helping maintain optimal engine temperature control and preventing coolant leaks in various vehicle applications, including the Mazda models supported by part number CO35025.

Product Details and Specifications

This thermostat housing is crafted from aluminum, providing strength and resistance to corrosion under high-temperature conditions. The part features two bolt holes for secure installation and an outlet with an outside diameter of 1.18 inches and an inside diameter of 0.87 inches, ensuring proper coolant flow. The Gates CO35025 is an exact OE replacement, guaranteeing compatibility and performance equivalent to the original part installed on Mazda 626, MX-6, Protege, and Protege5 vehicles.

Common Applications and Problem Resolution

  • Replacement for cracked or leaking thermostat housings
  • Restores proper coolant flow and engine temperature regulation
  • Prevents overheating caused by faulty thermostat housing
  • Eliminates coolant leaks that can lead to engine damage
  • Ensures secure mounting with two-bolt design for stability

Installation Notes and Tips

When installing the Gates CO35025 thermostat housing, ensure the mating surfaces are clean and free of old gasket material, as this part does not include a gasket. Use the two bolt holes to securely fasten the housing to the engine block. Verify outlet diameters match the vehicle’s coolant hose specifications for a proper seal. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.

Quality Assurance and Warranty

Gates provides this thermostat housing as an exact OE replacement, manufactured to meet original equipment standards. The aluminum construction offers durability and corrosion resistance for long service life. While specific warranty details are not provided here, Gates products typically come with manufacturer-backed quality assurance to support reliable performance in Mazda 626, MX-6, Protege, and Protege5 cooling systems.

BrandGates
Part NumberCO35025
PositionCoolant Outlet
MaterialAluminum
Outlet Outside Diameter1.18
Bolt Hole Quantity2
TypeThermostat housing
Gasket Quantity0
Outlet Inside Diameter.87
98410
9848No
ContentsThermostat housing
OE ExactYes

This part fits 22 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2003MazdaProtege2.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2003MazdaProtege52.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2002Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2002MazdaProtege2.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2002MazdaProtege52.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2001Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2001MazdaProtege2.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2000Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
2000MazdaProtege1.8LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1999Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1999MazdaProtege1.8LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1998Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1997Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1997MazdaMX-62.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1996Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1996MazdaMX-62.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1995Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1995MazdaMX-62.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1994Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1994MazdaMX-62.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1993Mazda6262.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; Coolant Outlet
1993MazdaMX-62.0LL4GASN/AEngine Coolant Water Outlet - Thermostat Housing; 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:

FS05-15-176FS0515176A

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