Motorad 294-170 Engine Coolant Thermostat

Engine Cooling Control for Subaru Applications

The Motorad Standard 294-170 engine coolant thermostat is built for Subaru cooling systems that call for a 170°F opening temperature. It uses OEM-specification materials and manufacturing processes to support consistent coolant flow control in Legacy, Outback, WRX, WRX STI, Impreza, Forester, Tribeca, B9 Tribeca, and Baja applications.

Motorad Standard focuses on OE-style fit and function for everyday service replacement. The 294-170 thermostat includes a copper case and wax compound for quick reaction to coolant temperature changes, along with an offset design, air relief valve, and OEM-style seals where applicable.

Key Features

• 170°F start-to-open temperature for Subaru cooling system service
• Copper case and wax compound for responsive temperature control
• Offset design with jiggle pin weep hole for air relief
• OEM-specification materials and manufacturing processes
• Standard type thermostat for direct replacement use
• Sealing flange outside diameter: 2.2 in
• Height between flanges: 1.32 in
• Overall height: 1.89 in
• Flange thickness: 0.05 in
• Gasket or seal not included

Product Details

Motorad part number 294-170 is an engine coolant thermostat for Subaru vehicles that require a standard 170°F thermostat. It is listed for 1990-2021 Subaru Legacy, Outback, WRX, WRX STI, Impreza, Forester, Tribeca, B9 Tribeca, and Baja applications, including models such as the Subaru WRX STI thermostat replacement and Subaru Forester coolant thermostat service. This part cross-references Carlson 14147 for the same application.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant circulation after cold starts
• Temperature fluctuation from a sticking thermostat
• Air trapped in the cooling system after service
• Loss of stable operating temperature in Subaru Legacy, Outback, or Impreza cooling systems

Installation Notes

Verify the 170°F specification before installation and confirm housing dimensions against the original part. The jiggle pin weep hole helps with air bleeding, so orient the thermostat correctly during installation. Because no gasket or seal is included, reuse only if serviceable or replace with the proper sealing component for the application. Always inspect the thermostat housing and coolant condition before reassembly.

Quality Assurance

Motorad manufactures this thermostat to OEM quality materials and safety standards as an OE supplier, with OE-specification processes intended to meet demanding automotive cooling requirements. The copper case and wax element are selected to provide consistent response to coolant temperature changes.

• Fits 2020-2021 Subaru WRX STI, N/A
• Fits 2015-2019 Subaru Legacy, N/A
• Fits 1990-2009 Subaru Legacy, N/A
• Fits 2015-2019 Subaru Outback, N/A
• Fits 2000-2009 Subaru Outback, N/A
• Fits 2013-2019 Subaru WRX STI, N/A
• Fits 2015-2016 Subaru WRX, N/A
• Fits 2012 Subaru WRX, N/A
• Fits 1993-2014 Subaru Impreza, N/A
• Fits 2013-2014 Subaru WRX, N/A
• Fits 1998-2013 Subaru Forester, N/A
• Fits 2010-2013 Subaru Legacy, N/A
• Fits 2010-2013 Subaru Outback, N/A
• Fits 2011-2013 Subaru Tribeca, N/A
• Fits 2008-2010 Subaru Tribeca, N/A
• Fits 2006-2007 Subaru B9 Tribeca, N/A
• Fits 2003-2006 Subaru Baja, N/A