Motorad 660-180 Engine Coolant Thermostat Housing Assembly - Upper

Overview of Motorad Integrated Housing Thermostat 660-180

The Motorad Integrated Housing Thermostat 660-180 is designed for precise engine temperature regulation in select Lexus models. This engine coolant thermostat housing assembly ensures reliable cooling system performance with a 180°F opening temperature, helping maintain optimal engine operation.

• Compatible with Lexus GS300, GS350, GS450h, IS250, IS300, IS350, RC300, and RC350
• Integrated Housing Thermostat product line for combined thermostat and housing assembly
• Thermostat opens at 180°F for accurate temperature control
• Constructed from plastic, stainless steel, and copper for durability
• Includes a rubber gasket/seal and jiggle pin for proper sealing and air bleeding
• Features 3 bolt holes for secure mounting and a 1.50-inch outlet diameter
• Bleeder hole included to facilitate coolant system bleeding

Product Line Details: Integrated Housing Thermostat

The Motorad Integrated Housing Thermostat line combines the thermostat and housing into a single assembly, simplifying installation and reducing potential leak points. This design integrates a jiggle pin and bleeder hole to improve coolant flow and air removal, enhancing engine cooling efficiency. The 660-180 part number represents a thermostat housing assembly engineered specifically for certain Lexus models, ensuring compatibility and reliable temperature regulation.

Technical Description and Features

This engine coolant thermostat housing assembly is engineered with a 180°F opening temperature, which is critical for maintaining the engine within its optimal operating range. The housing is made from a combination of plastic, stainless steel, and copper materials, providing a balance of corrosion resistance and structural integrity. The included rubber gasket ensures a tight seal between the housing and engine components, preventing coolant leaks. The assembly features three bolt holes for secure attachment and a single outlet port with a 1.50-inch diameter to accommodate coolant flow. Additionally, the bleeder hole and jiggle pin facilitate the removal of trapped air from the cooling system, which helps prevent overheating and improves system efficiency.

Applications and Problem Solving

• Replaces faulty or leaking thermostat housing assemblies in compatible Lexus models
• Addresses engine overheating caused by thermostat failure or improper coolant flow
• Prevents coolant leaks due to worn or damaged seals and gaskets
• Improves coolant system bleeding to reduce air pockets and maintain consistent engine temperature
• Restores proper engine temperature regulation for improved performance and longevity

Installation Notes and Tips

Installation requires removal of the old thermostat housing assembly and careful cleaning of the mounting surface to ensure proper gasket sealing. The Motorad 660-180 does not include mounting hardware or installation tools, so existing bolts should be inspected and reused if in good condition. Ensure the jiggle pin and bleeder hole are unobstructed to allow proper air release during coolant system refilling. Torque bolts evenly to manufacturer specifications to avoid leaks or damage.

Quality Assurance and Warranty

Motorad products are manufactured to meet OEM specifications for fit and function. The Integrated Housing Thermostat 660-180 undergoes quality checks to ensure durability and reliable performance in the specified Lexus models. This part includes a rubber gasket for sealing integrity. Warranty information should be confirmed with the distributor or retailer, as it may vary.