Motorad 730-221 Engine Coolant Thermostat Housing Assembly

Integrated Thermostat Housing for OE Cooling Control

Motorad 730-221 is an integrated engine coolant thermostat housing assembly built for OE-style cooling system service. It combines the thermostat, housing, sensor, and seal in one replacement unit for select Buick Encore, Chevrolet Trax, Chevrolet Sonic, Chevrolet Cruze, and Chevrolet Cruze Limited applications.

With a 221°F opening temperature, a bleeder hole, and a jiggle pin, this Motorad Integrated Housing Thermostat is set up for controlled coolant flow and easier air evacuation during service. The black housing uses plastic, stainless steel, and copper construction with a rubber seal for a direct-fit cooling system repair.

Key Features

• Motorad Integrated Housing Thermostat, part number 730-221
• 221°F start-to-open temperature for OE-spec cooling control
• Integrated housing design with thermostat, sensor, and seal
• Bleeder hole and jiggle pin included for air relief
• Rubber gasket/seal included
• 3 bolt holes and 2 outlet ports
• Black housing with plastic, stainless steel, and copper materials
• Offset design with OEM-style seals where applicable

Product Details

The Motorad Integrated Housing Thermostat line is built to OE specifications and processes, using OEM-quality materials and safety standards from an OE supplier. The copper case and wax compound are used to respond quickly to coolant temperature changes, helping maintain stable engine operating temperature in demanding cooling systems. This part cross-references Dorman - OE Solutions 902-808 and Continental 49392 for the same application.

Fits 2013-2021 Buick Encore, N/A. Fits 2013-2021 Chevrolet Trax, N/A. Fits 2012-2018 Chevrolet Sonic, N/A. Fits 2019 Chevrolet Sonic, N/A. Fits 2020 Chevrolet Sonic, N/A. Fits 2011-2016 Chevrolet Cruze, N/A. Fits 2016 Chevrolet Cruze Limited, N/A.

What It Helps Address

• Engine overheating caused by a thermostat that no longer opens at the correct temperature
• Coolant leaks at the thermostat housing or seal interface
• Air trapped in the cooling system after service
• Unstable engine temperature during stop-and-go driving
• Cooling system service on Buick Encore and Chevrolet Trax, Sonic, Cruze, and Cruze Limited models

Installation Notes and Tips

Verify the 221°F temperature rating and outlet configuration before installation. Inspect the mating surfaces, replace any damaged coolant hoses or clamps as needed, and follow the vehicle service procedure for bleeding air from the cooling system. This assembly uses 3 bolt holes and includes a seal; mounting hardware is not included.

Quality Assurance

Manufactured to OEM specifications and processes by an OE supplier, this thermostat housing assembly is built with OEM-quality materials for cooling system service. Motorad 730-221 is engineered for direct replacement use in the listed Buick and Chevrolet applications.