Motorad 294-140 Engine Coolant Thermostat

Motorad 294-140 Engine Coolant Thermostat

The Motorad 294-140 engine coolant thermostat is built for Subaru cooling systems that need a precise 140 degree opening temperature. Manufactured to OEM specifications with OE-supplier quality materials, it uses a stainless steel construction with a copper case and wax compound for quick response to coolant temperature changes.

Compatible with a wide range of Subaru applications, including Legacy, Outback, Impreza, Forester, WRX, and WRX STI models, this thermostat supports stable engine temperature control in daily driving and demanding operating conditions. The Motorad Standard line focuses on direct-fit cooling system service parts for routine maintenance and repair.

Key Features

• Engine coolant thermostat with a 140 Deg. F start-to-open temperature
• Stainless steel construction for corrosion resistance
• Copper case and wax compound for responsive temperature control
• Manufactured to OEM specifications and processes
• OE supplier quality materials and safety standards
• Flange diameter: 2.205 in; flange thickness: 0.05 in
• No gasket or seal included
• No hardware, jiggle pin, or installation tool included

Detailed Description

Motorad part number 294-140 is a Standard line engine coolant thermostat engineered for Subaru cooling system service where a 140 degree opening point is specified. The stainless steel body and copper/wax thermal element are selected to react quickly as coolant temperature rises, helping the engine reach and maintain its operating range with consistent control. This thermostat is a direct replacement style component for Subaru Legacy, Outback, Impreza, Forester, Tribeca, Baja, WRX, and WRX STI applications listed below.

This part cross-references Carlson 14144 and AMS Automotive 4144 for the same application. Motorad 294-140 is also referenced by alternate part numbers 140-492 and 9294140.

What This Thermostat Helps Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuation caused by a worn thermostat
• Cooling system service on Subaru models with a 140F thermostat specification
• Restoration of proper coolant flow control after thermostat failure
• Maintenance on vehicles showing inconsistent heater performance tied to engine temperature

Installation Notes and Tips

Verify the thermostat housing and sealing surface before installation. Because no gasket or seal is included, use the correct separate seal or gasket specified for the vehicle application. Confirm the 140 degree temperature requirement and match the flange dimensions to the original part before assembly. Clean the housing thoroughly and follow the vehicle service procedure for coolant refill and air bleeding after installation.

Fits 1990-2019 Subaru Legacy, N/A; Fits 2000-2019 Subaru Outback, N/A; Fits 1993-2014 Subaru Impreza, N/A; Fits 1998-2013 Subaru Forester, N/A; Fits 2008-2014 Subaru Tribeca, N/A; Fits 2003-2006 Subaru Baja, N/A; Fits 2013-2014 Subaru WRX, N/A; Fits 2013-2019 Subaru WRX STI, N/A; Fits 2006-2007 Subaru B9 Tribeca, N/A; Fits 2020 Subaru WRX STI, N/A.

Quality Assurance

Motorad manufactures this thermostat with OEM quality materials and safety standards as an OE supplier, using OEM specifications and processes for consistent fit and thermal response.