OE Quality
60-Day Returns

Gates CO34980 Engine Coolant Thermostat Housing Cover
Overview of Gates Coolant Outlet Thermostat Housing Cover
The Gates Coolant Outlet Engine Coolant Thermostat Housing Cover (Part Number CO34980) is designed specifically for Hyundai and Kia vehicles, including the Optima and Sonata models. This thermostat cover is engineered to meet exact OE specifications, ensuring reliable performance and proper fitment.
- Constructed from durable plastic material for corrosion resistance
- Features 2 bolt holes for secure mounting
- Outlet outside diameter measures 1.38 inches
- Outlet inside diameter measures 1.13 inches
- OE exact replacement for precise compatibility
- Thermostat cover type with no by-pass holes
- Does not include gaskets or seals
Detailed Product Description
This Gates Coolant Outlet thermostat housing cover is manufactured from high-quality plastic, providing a lightweight yet durable solution for your vehicle's cooling system. The part is designed with two bolt holes to ensure a secure and stable installation. Its outlet dimensions—1.38 inches outside diameter and 1.13 inches inside diameter—are engineered to match the original equipment, maintaining proper coolant flow and system integrity.
As part of the Gates Coolant Outlet product line, this thermostat cover is developed to meet stringent quality standards and exact OE fitment requirements. The Coolant Outlet line focuses on components that manage coolant flow efficiently, helping maintain optimal engine temperature and performance.
Compatible Vehicles and Applications
This thermostat housing cover is compatible with select Hyundai and Kia models, specifically the Hyundai Optima and Sonata. It is an ideal replacement part for those seeking an exact fit and reliable performance in their vehicle's cooling system.
- Replacement for damaged or cracked thermostat housing covers
- Resolves coolant leaks around the thermostat area
- Prevents overheating caused by faulty thermostat covers
- Restores proper coolant outlet dimensions for efficient flow
- Maintains engine temperature regulation in Hyundai Optima and Kia Sonata
Installation Notes and Tips
When installing the Gates CO34980 thermostat housing cover, ensure the mounting surface is clean and free of debris. Since this part does not include gaskets or seals, use the appropriate OEM or aftermarket gaskets to prevent leaks. Tighten the two bolts evenly to the manufacturer's torque specifications to avoid warping or damage.
Quality Assurance and Warranty
The Gates Coolant Outlet thermostat housing cover is manufactured to meet OE exact standards, ensuring reliable fit and function. While specific warranty details are not provided, Gates products typically undergo rigorous quality control to maintain durability and performance in automotive cooling systems.
| Brand | Gates |
| Part Number | CO34980 |
| Position | Coolant Outlet |
| Material | Plastic |
| Outlet Outside Diameter | 1.38 |
| Bolt Hole Quantity | 2 |
| Type | Thermostat cover |
| Gasket Quantity | 0 |
| Outlet Inside Diameter | 1.13 |
| 9841 | 0 |
| 9848 | No |
| By-Pass Holes | No |
| Contents | Thermostat cover |
| Number of Bolt Holes | 2 |
| Number of Gaskets | 0 |
| Number of Seals | 0 |
| OE Exact | Yes |
| Outlet Inside Diameter 1 (in) | 1.13 |
| Outlet Outside Diameter 1 (in) | 1.38 |
| Type | Thermostat cover |
This part fits 7 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2020 | Kia | Optima | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Coolant Outlet |
| 2019 | Hyundai | Sonata | 2.0L | L4 | ELECTRIC/GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2019 | Kia | Optima | 2.0L | L4 | ELECTRIC/GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2018 | Hyundai | Sonata | 2.0L | L4 | ELECTRIC/GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2018 | Kia | Optima | 2.0L | L4 | ELECTRIC/GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2017 | Kia | Optima | 2.0L | L4 | ELECTRIC/GAS | N/A | Engine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet |
| 2016 | Hyundai | Sonata | 2.0L | L4 | ELECTRIC/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.