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Gates CO34978 Engine Coolant Water Outlet
| Brand | Gates CO34978 |
|---|---|
| Material | Plastic |
| Outlet Outside Diameter | .34 |
| Outlet Outside Diameter | .85 |
| Outlet Outside Diameter | .86 |
| Outlet Outside Diameter | 1.36 |
| Bolt Hole Quantity | 3 |
| Type | Thermostat housing |
| Gasket Quantity | 0 |
| Outlet Inside Diameter | .19 |
| Outlet Inside Diameter | .65 |
| Outlet Inside Diameter | .67 |
| Outlet Inside Diameter | 1.16 |
| 9841 | 2 |
| 9848 | No |
| By-Pass Holes | No |
| Contents | Thermostat housing w/ integrated seal |
| Contents | Thermostat housing, integrated seal |
| Number of Bolt Holes | 3 |
| Number of Gaskets | 0 |
| Number of Seals | 2 |
| OE Exact | No |
| Outlet Inside Diameter 1 (in) | 1.16 |
| Outlet Inside Diameter 2 (in) | .65 |
| Outlet Inside Diameter 3 (in) | .67 |
| Outlet Inside Diameter 4 (in) | .19 |
| Outlet Inside Diameter 5 (in) | .19 |
| Outlet Outside Diameter 1 (in) | 1.36 |
| Outlet Outside Diameter 2 (in) | .85 |
| Outlet Outside Diameter 3 (in) | .86 |
| Outlet Outside Diameter 4 (in) | .34 |
| Product line | Coolant Outlet |
| Fits | Hyundai and Kia · 4 vehicles |
OE-style fit. Designed to match original performance with a cost-effective replacement.
Plastic construction. Helps resist common material issues found in aftermarket options.
Integrated seal. Thermostat housing includes sealing built in for a cleaner install.
Cross-references 256202G600 for the same application. See all 1.
Gates Coolant Outlet for Hyundai Sonata and Kia Optima
The Gates Coolant Outlet CO34978 is a thermostat housing assembly built for 2009-2010 Hyundai Sonata and 2009-2010 Kia Optima applications. It is made from plastic and includes an integrated seal for a direct-fit cooling system repair.
Key Features
- Gates Coolant Outlet line for thermostat housing and water outlet applications
- Fits 2009-2010 Hyundai Sonata and 2009-2010 Kia Optima
- Thermostat housing design with integrated seal
- Plastic construction for OE-style fit and function
- Three-bolt housing configuration
- Multiple outlet diameters for the specified cooling system layout
Product Details
Gates CO34978 is an engine coolant water outlet and thermostat housing assembly engineered to match the original layout of the cooling system. The Gates Coolant Outlet product line is focused on replacing common failure-prone housing designs with a cost-effective part that addresses material and design concerns found in many aftermarket alternatives. This housing is intended for 2009-2010 Hyundai Sonata and 2009-2010 Kia Optima models, making it a direct reference for drivers searching for a thermostat housing for Hyundai Sonata or Kia Optima coolant outlet replacement. The part number CO34978 is also useful when cross-checking catalog listings and service records.
This part cross-references Hyundai/Kia OE number 256202G600 for the same application.
Common Repair Uses
- Replacing a cracked or leaking thermostat housing
- Restoring proper coolant flow at the engine outlet
- Addressing coolant seepage around the housing seal area
- Repairing a damaged plastic coolant outlet on Hyundai Sonata or Kia Optima
- Correcting overheating concerns caused by housing leakage
Installation Notes
Verify the housing shape, bolt-hole count, and outlet diameters against the original part before installation. Clean the mating surfaces thoroughly and inspect adjacent hoses, clamps, and the thermostat area for wear or contamination. Because this assembly includes an integrated seal, confirm the sealing surfaces are free of debris and coolant residue before reassembly. Use the vehicle service procedure for coolant refill and air bleeding after installation.
Quality Assurance
Gates designs this coolant outlet line to fit and perform like the original part while providing long service life. The CO34978 is built as a thermostat housing replacement for the specified Hyundai Sonata and Kia Optima applications, with attention to OE-style fitment and cooling system reliability.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2010 | Hyundai | Sonata | 2.4L | L4 | GAS | N/A | Thermostat Housing; Seal included; Coolant Outlet |
| 2010 | Kia | Optima | 2.4L | L4 | GAS | N/A | Thermostat Housing; Seal included; Coolant Outlet |
| 2009 | Hyundai | Sonata | 2.4L | L4 | GAS | N/A | Thermostat Housing; Seal included; Coolant Outlet |
| 2009 | Kia | Optima | 2.4L | L4 | GAS | N/A | Thermostat Housing; Seal included; Coolant Outlet |
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