Motorad 986-221 Engine Coolant Thermostat Housing Assembly

Reliable Engine Coolant Thermostat Housing for BMW Models

The Motorad Integrated Housing Thermostat 986-221 is designed to maintain optimal engine temperature for select BMW vehicles. Engineered with durable materials and precise specifications, this thermostat housing assembly supports efficient coolant flow and temperature regulation.

• Constructed from plastic, steel, and copper for durability and heat resistance
• Includes a rubber O-ring gasket with bleeder hole for secure sealing and air release
• Designed with a 1.51-inch outlet diameter and 1.57-inch bypass diameter for proper coolant circulation
• Features three bolt holes for secure mounting (mounting hardware not included)
• Temperature rating of 221°F to ensure accurate thermostat operation

About the Motorad Integrated Housing Thermostat Product Line

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 ensures consistent engine temperature control. The 986-221 part exemplifies this approach, providing a ready-to-install solution for compatible BMW models.

Detailed Product Description

This engine coolant thermostat housing assembly is specifically engineered for BMW vehicles including the 550i xDrive, 750i, 750i xDrive, 750Li, Alpina B8 Gran Coupe, Alpina XB7, M550i xDrive, M850i xDrive, M850i xDrive Gran Coupe, X5, X6, and X7. The housing is made from a combination of plastic, steel, and copper to balance strength and thermal conductivity. The included rubber O-ring gasket with a bleeder hole ensures a tight seal and allows trapped air to escape, preventing overheating issues. The thermostat is calibrated to open at 221 degrees Fahrenheit, maintaining optimal engine temperature for performance and efficiency.

Common Applications and Issues Addressed

• Replacement for faulty or leaking thermostat housing assemblies
• Resolves engine overheating caused by thermostat failure
• Prevents coolant leaks that can lead to engine damage
• Addresses poor engine temperature regulation affecting fuel efficiency
• Eliminates air pockets in the cooling system via the bleeder hole

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the included rubber O-ring gasket for proper sealing; do not reuse old gaskets
• Torque the three mounting bolts evenly to manufacturer specifications
• Bleed the cooling system after installation to remove trapped air
• Mounting hardware and installation tools are not included and must be sourced separately

Quality Assurance and Warranty

The Motorad Integrated Housing Thermostat 986-221 is manufactured to meet OEM standards for fit and function. The use of quality materials such as steel, copper, and durable plastics ensures long service life. This part includes a rubber O-ring gasket to maintain a reliable seal. While specific warranty details are not provided, Motorad products typically adhere to industry quality controls to support dependable performance in BMW cooling systems.