OE Quality
60-Day Returns

Gates CO35031 Engine Coolant Thermostat Housing Cover
Reliable Engine Coolant Thermostat Housing Cover for Nissan and Infiniti
The Gates Coolant Outlet Engine Coolant Thermostat Housing Cover (Part Number CO35031) is designed to provide a precise fit and durable performance for select Nissan and Infiniti vehicles. Crafted from aluminum, this thermostat cover ensures efficient heat dissipation and long-lasting service in your cooling system.
Key Features of Gates CO35031 Thermostat Cover
- Constructed from high-quality aluminum for strength and corrosion resistance
- Exact OE replacement ensuring proper fit and function
- Outlet outside diameter of 1.02 inches and inside diameter of 0.83 inches for accurate coolant flow
- Two bolt holes for secure mounting
- Compatible with Nissan Maxima, Pathfinder, Infiniti I30, and QX4 models
- Part of the Gates Coolant Outlet product line, designed specifically for cooling system components
Detailed Description of the Gates Coolant Outlet Thermostat Cover
This thermostat housing cover from Gates is engineered to meet original equipment specifications, making it a reliable replacement for your vehicle’s cooling system. The aluminum construction offers enhanced durability and heat resistance compared to plastic alternatives, helping to maintain optimal engine temperature. With an outlet outside diameter of 1.02 inches and an inside diameter of 0.83 inches, the cover supports proper coolant flow and system efficiency. The two bolt holes ensure a secure and stable installation, minimizing the risk of leaks or misalignment.
The Gates Coolant Outlet product line focuses on components that manage coolant flow and temperature regulation, providing parts that match OE quality and fitment. This thermostat cover is designed to integrate seamlessly with the cooling systems of Nissan and Infiniti vehicles, including the Maxima, Pathfinder, I30, and QX4 models.
Common Applications and Issues Addressed
- Replacement for cracked or damaged thermostat housing covers
- Prevents coolant leaks caused by worn or warped covers
- Restores proper coolant flow and engine temperature regulation
- Addresses overheating issues related to faulty thermostat covers
- Ensures compatibility with Nissan Maxima, Pathfinder, Infiniti I30, and QX4 cooling systems
Installation Notes and Tips
When installing the Gates CO35031 thermostat housing cover, ensure the mating surfaces are clean and free of old gasket material or debris. Although this part does not include a gasket, it is recommended to use a compatible gasket or sealant as specified by the vehicle manufacturer. Tighten the two mounting bolts evenly to the recommended torque specifications to avoid warping or leaks. Verify proper coolant flow and check for leaks after installation.
Quality Assurance and Warranty Information
The Gates CO35031 thermostat housing cover is manufactured to meet or exceed original equipment standards, providing reliable performance and durability. This part is an exact OE replacement, ensuring fit and function for Nissan and Infiniti vehicles. While specific warranty details are not provided, Gates products typically come with a limited warranty against defects in material and workmanship. Consult the product documentation or manufacturer for exact warranty terms.
| Brand | Gates |
| Part Number | CO35031 |
| Position | Coolant Outlet |
| Material | Aluminum |
| Outlet Outside Diameter | 1.02 |
| Bolt Hole Quantity | 2 |
| Type | Thermostat cover |
| Gasket Quantity | 0 |
| Outlet Inside Diameter | .83 |
| 9841 | 0 |
| 9848 | No |
| Contents | Thermostat cover |
| OE Exact | Yes |
This part fits 11 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2004 | Nissan | Pathfinder | 3.5L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2003 | INFINITI | QX4 | 3.5L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2003 | Nissan | Pathfinder | 3.5L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2002 | INFINITI | QX4 | 3.5L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2002 | Nissan | Pathfinder | 3.5L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2001 | INFINITI | I30 | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2001 | INFINITI | QX4 | 3.5L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2001 | Nissan | Maxima | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2001 | Nissan | Pathfinder | 3.5L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2000 | INFINITI | I30 | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2000 | Nissan | Maxima | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.