Motorad 975-198 Engine Coolant Thermostat Housing Assembly

Overview of Motorad Integrated Housing Thermostat 975-198

The Motorad Integrated Housing Thermostat 975-198 is designed for precise engine temperature regulation in select Mercedes-Benz models. This thermostat housing assembly ensures reliable coolant flow control, helping maintain optimal engine performance and efficiency.

• Compatible with Mercedes-Benz GL350, GLS350d, ML350, R350, and S350 models
• Integrated Housing Thermostat product line for streamlined cooling system integration
• Constructed from durable aluminum, stainless steel, and copper materials
• Includes a rubber gasket/seal and a jiggle pin for effective coolant venting
• Features a bleeder hole and four bolt holes for secure mounting
• Thermostat opens at 198°F to regulate engine temperature accurately
• Outlet port diameter of 1.90 inches for proper coolant flow

Detailed Product Description

This Engine Coolant Thermostat Housing Assembly from Motorad, part number 975-198, is engineered to meet the cooling system requirements of various Mercedes-Benz vehicles including the GL350, GLS350d, ML350, R350, and S350. The assembly is crafted from a combination of aluminum, stainless steel, and copper, providing strength and corrosion resistance. It features a single outlet port with a 1.90-inch diameter to ensure efficient coolant circulation.

The thermostat integrated within the housing opens at 198 degrees Fahrenheit, allowing the engine to reach optimal operating temperature before coolant flow begins. This precise temperature control helps prevent engine overheating and promotes fuel efficiency. The included rubber gasket ensures a tight seal to prevent leaks, while the jiggle pin and bleeder hole facilitate air removal from the cooling system during installation and operation.

About the Integrated Housing Thermostat Product Line

The Motorad Integrated Housing Thermostat line combines the thermostat and housing into a single assembly, simplifying installation and reducing potential leak points. This design is intended to provide a reliable and compact solution for engine cooling systems, particularly in Mercedes-Benz models requiring precise temperature management. The 975-198 part exemplifies this approach by integrating essential components into one durable unit.

Common Applications and Issues Addressed

• Replacement for faulty or leaking thermostat housings in Mercedes-Benz GL350, GLS350d, ML350, R350, and S350
• Resolves engine overheating caused by thermostat failure
• Prevents coolant leaks due to worn or damaged seals
• Improves coolant flow regulation for consistent engine temperature
• Eliminates air pockets in the cooling system with built-in bleeder hole and jiggle pin

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the included rubber gasket to create a proper seal and prevent leaks
• Torque the four mounting bolts evenly to manufacturer specifications
• Bleed the cooling system using the bleeder hole and jiggle pin to remove trapped air
• Note that mounting hardware and installation tools are not included and must be sourced separately

Quality Assurance and Warranty

Motorad manufactures the 975-198 thermostat housing assembly to meet OEM standards for fit and function. The use of high-quality materials such as aluminum, stainless steel, and copper ensures durability and corrosion resistance. This part includes a rubber gasket for sealing integrity. While specific warranty details are not provided, Motorad products typically adhere to industry quality controls to support reliable vehicle operation.