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Motorad 991-189 Engine Coolant Thermostat Housing Assembly
| Brand | Motorad 991-189 |
|---|---|
| Bleeder Hole | Yes |
| Bypass Diameter | 1.43 in |
| Bypass Length | 1.08 in |
| Color | Silver |
| Gasket Or Seal Included | Yes |
| Gasket Type | O-Ring |
| Gasket/Seal Material | Rubber |
| Gasket/Seal Material | Rubber |
| Grade Type | Regular |
| Installation Tool Included | No |
| Material | Aluminum, Steel, Copper |
| Mounting Hardware Included | No |
| Number Of Bolt Holes | 3 |
| Number Of Outlet Ports | 1 |
| Number Of Seals | 1 |
| Outlet Diameter | 1.66 in |
| Temperature | 189 Deg. F |
| Temperature (Degree) | 189 |
| Product line | Integrated Housing Thermostat |
| Fits | Jeep · 4 vehicles |
Integrated housing design. Combines the thermostat and housing into one serviceable assembly.
OE supplier quality. Built with OEM materials and processes to meet demanding cooling systems.
Rapid temperature response. Copper case and wax compound react quickly to coolant changes.
Cross-references Bosch 15898, Dorman - OE Solutions 902-3116 and Motorad 991-189 for the same application. See all 10.
Integrated Housing Thermostat for Jeep Cooling Systems
The Motorad 991-189 integrated housing thermostat is built for 2007-2010 Jeep Grand Cherokee applications that call for a 189°F thermostat housing assembly. It combines the thermostat, housing, and seal in one OE-style service part for direct replacement work on the cooling system.
Motorad’s Integrated Housing Thermostat line focuses on OE-spec construction and temperature control response. The 991-189 uses aluminum, steel, and copper materials, with a copper case and wax compound to react quickly to coolant temperature changes.
Key Features
- Fits 2007-2010 Jeep Grand Cherokee, N/A
- Part number: 991-189
- 189°F thermostat temperature rating
- Integrated thermostat housing assembly
- Includes gasket/seal with O-ring style seal
- Bleeder hole for service and air evacuation
- 3-bolt housing design with 1 outlet port
- Aluminum, steel, and copper construction
- Silver finish
Detailed Description
The Motorad 991-189 is an engine coolant thermostat housing assembly made for Jeep Grand Cherokee cooling system service. It is manufactured to OEM specifications and processes, with OE-supplier quality materials and safety standards. The integrated design helps simplify replacement by combining the thermostat and housing into one service component, while the 189°F calibration supports factory-style coolant temperature control.
This part cross-references Bosch 15898 and Dorman OE Solutions 902-3116 for the same application. If you are replacing a worn thermostat housing on a 2007-2010 Jeep Grand Cherokee, the 991-189 provides a direct-fit service option that matches the specified temperature and housing configuration.
Common Cooling System Issues
- Engine running too cool or too warm due to thermostat wear
- Coolant leaks at the thermostat housing or seal surface
- Slow coolant temperature response during warm-up
- Air trapped in the cooling system after service
- Housing corrosion or seal deterioration in the thermostat assembly
Installation Notes and Tips
Verify the 189°F temperature specification and housing layout before installation. This assembly includes a gasket/seal, and the bleeder hole can help with air removal during refill. Mounting hardware and installation tools are not included, so reuse or source the required fasteners as needed. Clean the mating surfaces thoroughly before installing the new housing to help achieve a proper seal.
Quality Assurance
Motorad manufactures this integrated housing thermostat with OE-supplier standards, using OEM-quality materials and factory-style processes for cooling system service.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | Jeep | Grand Cherokee | 3.0L | V6 | N/A | Temperature 189F - Includes thermostat, housing, and seal - OE Specified Temperature; Integrated Housing Thermostat |
| 2009 | Jeep | Grand Cherokee | 3.0L | V6 | N/A | Temperature 189F - Includes thermostat, housing, and seal - OE Specified Temperature; Integrated Housing Thermostat |
| 2008 | Jeep | Grand Cherokee | 3.0L | V6 | N/A | Temperature 189F - Includes thermostat, housing, and seal - OE Specified Temperature; Integrated Housing Thermostat |
| 2007 | Jeep | Grand Cherokee | 3.0L | V6 | N/A | Temperature 189F - Includes thermostat, housing, and seal - OE Specified Temperature; Integrated Housing Thermostat |
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