OE Quality
60-Day Returns

Gates CO34992 Engine Coolant Thermostat Housing Cover
Overview of Gates Coolant Outlet CO34992
The Gates Coolant Outlet CO34992 is a precision-engineered engine coolant thermostat housing cover designed for select Toyota models. Crafted from durable aluminum, this coolant outlet ensures reliable heat management and fluid flow in your vehicle's cooling system.
- Material: High-quality aluminum construction for durability and heat resistance
- Outlet Outside Diameter: 1.85 inches
- Outlet Inside Diameter: 1.48 inches
- Bolt Hole Quantity: 3 for secure mounting
- Type: Thermostat cover without by-pass holes
- Gasket Quantity: 0 (gasket not included)
Detailed Product Description
The Gates Coolant Outlet CO34992 is specifically designed as an engine coolant thermostat housing cover, providing a critical interface between the thermostat and the cooling system. Its aluminum construction offers excellent thermal conductivity and corrosion resistance, which helps maintain optimal engine temperature. The outlet features an outside diameter of 1.85 inches and an inside diameter of 1.48 inches, dimensions that ensure proper coolant flow and compatibility with the connected hoses. With three bolt holes, this thermostat cover mounts securely to the engine, maintaining a tight seal despite thermal expansion and vibration. This part does not include gaskets or seals, so replacement of these components should be considered during installation.
About the Gates Coolant Outlet Product Line
The Gates Coolant Outlet line focuses on providing reliable and durable components for engine cooling systems. This product line emphasizes precision fit and material quality to support efficient coolant flow and temperature regulation. The CO34992 model fits within this line as a thermostat cover designed to meet the specific requirements of Toyota vehicles, ensuring compatibility and performance without being an exact OE replacement.
Compatible Vehicles and Common Applications
This engine coolant thermostat housing cover is compatible with the following Toyota models:
- Toyota Avalon
- Toyota Camry
- Toyota Sienna
It is commonly used to address issues such as:
- Coolant leaks around the thermostat housing
- Overheating caused by faulty thermostat covers
- Corrosion or damage to the original thermostat housing
- Improper coolant flow due to worn or cracked covers
Installation Notes and Tips
When installing the Gates Coolant Outlet CO34992, ensure the mating surfaces are clean and free of old gasket material since this part does not include a gasket. Use the correct torque specifications for the three bolt holes to avoid warping or leaks. Inspect the thermostat and surrounding components for wear or damage during installation to maintain optimal cooling system performance.
Quality Assurance and Warranty
Gates manufactures the CO34992 coolant outlet with stringent quality controls 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 Toyota Avalon, Camry, and Sienna models. Warranty information should be confirmed with the point of purchase or manufacturer documentation.
| Brand | Gates |
| Part Number | CO34992 |
| Position | Coolant Outlet |
| Material | Aluminum |
| Outlet Outside Diameter | 1.85 |
| Bolt Hole Quantity | 3 |
| Type | Thermostat cover |
| Gasket Quantity | 0 |
| Outlet Inside Diameter | 1.48 |
| 9841 | 0 |
| 9848 | No |
| By-Pass Holes | No |
| Contents | Coolant outlet |
| Number of Bolt Holes | 3 |
| Number of Gaskets | 0 |
| Number of Seals | 0 |
| OE Exact | No |
| Outlet Inside Diameter 1 (in) | 1.48 |
| Outlet Outside Diameter 1 (in) | 1.85 |
| Type | Coolant outlet |
This part fits 10 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2000 | Toyota | Sienna | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1999 | Toyota | Avalon | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1999 | Toyota | Sienna | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1998 | Toyota | Avalon | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1998 | Toyota | Sienna | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1997 | Toyota | Avalon | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1996 | Toyota | Avalon | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1996 | Toyota | Camry | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1995 | Toyota | Avalon | 3.0L | V6 | GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 1995 | Toyota | Camry | 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.