Motorad 725-221 Engine Coolant Thermostat Housing Assembly - Upper

Integrated Housing Thermostat for OE Cooling Control

Motorad 725-221 is an integrated housing thermostat assembly built for precise coolant temperature control in OE-style cooling systems. It combines the thermostat, housing, sensor, and seal in one service part for select Chevrolet, Pontiac, and Suzuki applications, including Chevrolet Cruze, Sonic, and Trax fitments.

The Motorad Integrated Housing Thermostat line focuses on direct replacement design and OE-style sealing for service work where the thermostat housing is serviced as a complete assembly. Part number 725-221 is specified at 221 Deg. F and uses OEM-quality materials and manufacturing processes for consistent operation in demanding cooling environments.

Key Features

• Integrated engine coolant thermostat housing assembly
• 221 Deg. F opening temperature
• Aluminum, stainless steel, and copper construction
• Rubber seal included
• 4 bolt holes with 1 outlet port
• 1.33 in outlet diameter
• Silver finish
• OE-style design with offset layout and air relief valve where applicable

Detailed Product Overview

Motorad 725-221 is engineered as an OE supplier replacement for vehicles that use an integrated thermostat housing. The copper case and wax compound are used to respond quickly to coolant temperature changes, helping maintain stable engine operating temperature. This part cross-references Dayco 72521 and Stant 49522 for the same application. Search terms such as Chevrolet Cruze thermostat housing assembly, Chevrolet Sonic coolant thermostat housing, and Chevrolet Trax integrated housing thermostat all point to this style of repair part.

Common Issues This Part Can Address

• Coolant temperature regulation concerns caused by a worn thermostat
• Leaking thermostat housing seals
• Cracked or deteriorated housing on serviceable cooling systems
• Temperature-related drivability issues tied to thermostat performance
• Cooling system service needs on Chevrolet Cruze, Sonic, and Trax applications

Installation Notes and Tips

• Verify the 221 Deg. F temperature rating before installation.
• Inspect the mating surface and replace contaminated coolant as needed during service.
• Confirm the 4-bolt housing pattern and 1.33 in outlet diameter match the original part.
• Follow the vehicle service procedure for coolant bleeding and refill.
• Use the fitment notes to confirm position, including N/A and Upper applications.

Quality Assurance

Manufactured to OEM specifications and processes, Motorad 725-221 is built with OEM-quality materials and safety standards by an OE supplier. The integrated housing design, rubber seal, and OE-style sealing approach support accurate replacement service for compatible Chevrolet, Pontiac, and Suzuki cooling system applications.