Motorad 730-221 Engine Coolant Thermostat Housing Assembly

Reliable Cooling with Motorad Integrated Housing Thermostat

The Motorad Integrated Housing Thermostat 730-221 is designed to maintain optimal engine temperature for select Buick and Chevrolet models. Engineered for precision, this thermostat housing assembly ensures efficient coolant flow and temperature regulation.

• Integrated thermostat housing assembly with bleeder hole for air removal
• Constructed from durable plastic, stainless steel, and copper materials
• Includes a rubber gasket/seal for secure, leak-free installation
• Features three bolt holes and two outlet ports (1.50 in and 0.78 in diameter)
• Thermostat opens at 221°F with an included jiggle pin for proper coolant circulation

Product Line: Motorad Integrated Housing Thermostat

The Integrated Housing Thermostat line by Motorad combines the thermostat and housing into a single assembly, simplifying installation and improving reliability. This design reduces potential leak points and streamlines coolant system maintenance. The 730-221 part number represents a precise fit for specific Buick and Chevrolet vehicles, ensuring consistent engine temperature control.

Detailed Product Description

This engine coolant thermostat housing assembly is compatible with Buick and Chevrolet models including the Cruze, Cruze Limited, Encore, Sonic, and Trax. The assembly features a bleeder hole to facilitate air removal during installation, preventing air pockets that can impair cooling efficiency. The thermostat opens at 221 degrees Fahrenheit, allowing coolant to flow through the two outlet ports with diameters of 1.50 inches and 0.78 inches respectively. The included rubber gasket ensures a tight seal between the housing and engine block, minimizing the risk of leaks. Although mounting hardware and bolts are not included, the three bolt holes provide a secure attachment point for existing hardware.

Common Applications and Issues Addressed

• Regulates engine temperature to prevent overheating
• Replaces faulty or leaking thermostat housings
• Eliminates coolant leaks caused by worn seals or gaskets
• Restores proper coolant flow in Buick Cruze and Chevrolet Sonic cooling systems
• Prevents air pockets in the cooling system with built-in bleeder hole

Installation Notes and Tips

• Ensure engine is cool before beginning installation to avoid burns
• Use the included rubber gasket to create a proper seal; do not reuse old gaskets
• Bleed the cooling system after installation to remove trapped air via the bleeder hole
• Torque bolts to manufacturer specifications; bolts are not included with this assembly
• Verify compatibility with your specific Buick or Chevrolet model before installation

Quality Assurance and Warranty

The Motorad Integrated Housing Thermostat 730-221 is manufactured using high-quality materials including plastic, stainless steel, and copper to ensure durability and reliable performance. The rubber gasket provides a secure seal to prevent leaks. This part is designed to meet or exceed OEM specifications for the listed Buick and Chevrolet models. Warranty information should be confirmed with the distributor or retailer at the time of purchase.