Motorad 678-221 Engine Coolant Thermostat Housing Assembly

Overview of Motorad Integrated Housing Thermostat 678-221

The Motorad Integrated Housing Thermostat 678-221 is designed specifically for Mini Cooper, Cooper Countryman, and Cooper Paceman models. This engine coolant thermostat housing assembly ensures precise temperature regulation with a start-to-open temperature of 221°F, helping maintain optimal engine performance.

• Compatible with Mini Cooper, Cooper Countryman, and Cooper Paceman
• Integrated Housing Thermostat product line by Motorad
• Start to open temperature: 221°F
• Includes rubber gasket/seal and jiggle pin
• Constructed from plastic, stainless steel, and copper materials
• Three bolt holes for secure mounting
• Six outlet ports with varied diameters for efficient coolant flow
• Bleeder hole included for air removal

Detailed Product Description

This Motorad Integrated Housing Thermostat 678-221 combines the thermostat and housing into a single assembly, simplifying installation and improving reliability. The thermostat opens at 221 degrees Fahrenheit, ensuring the engine coolant circulates at the correct temperature to prevent overheating or overcooling. The housing is made from a combination of durable plastic, stainless steel, and copper, providing corrosion resistance and long service life.

The assembly features three bolt holes for secure attachment and includes a rubber gasket to ensure a tight seal and prevent leaks. A jiggle pin is integrated to help remove trapped air from the cooling system, while the bleeder hole further aids in air evacuation. The six outlet ports vary in diameter (ranging from 0.72 to 1.68 inches) to accommodate different coolant flow paths within the engine cooling system.

About the Integrated Housing Thermostat Product Line

The Motorad Integrated Housing Thermostat line combines the thermostat and housing into a single unit, reducing the number of components and potential leak points. This design streamlines the cooling system maintenance process and enhances the reliability of temperature regulation. The 678-221 part is a representative example, engineered for specific Mini models to meet OEM specifications.

Common Applications and Issues Addressed

• Regulates engine coolant temperature for Mini Cooper, Cooper Countryman, and Cooper Paceman
• Prevents engine overheating by opening at 221°F
• Eliminates coolant leaks with included rubber gasket
• Helps remove air pockets in the cooling system via bleeder hole and jiggle pin
• Replaces worn or damaged thermostat housing assemblies

Installation Notes and Tips

• Ensure the engine is cool before beginning installation
• Use the included rubber gasket to prevent coolant leaks
• Torque bolts evenly across the three mounting holes for proper sealing
• Bleeder hole and jiggle pin assist in removing trapped air during coolant refilling
• Note that mounting hardware and bolts are not included and must be reused or sourced separately

Quality Assurance and Warranty

Motorad manufactures the Integrated Housing Thermostat 678-221 to meet or exceed OEM standards for fit and function. The use of high-quality materials such as stainless steel and copper ensures durability and corrosion resistance. This part includes a rubber gasket for a reliable seal. Warranty details should be confirmed with the distributor or retailer, as they may vary.