Motorad 637-180 Engine Coolant Thermostat Housing Assembly - Upper

Reliable Engine Coolant Thermostat Housing for Lexus and Toyota

The Motorad Integrated Housing Thermostat 637-180 is designed to maintain optimal engine temperature for select Lexus and Toyota models. This engine coolant thermostat housing assembly ensures precise temperature regulation starting at 180°F, helping to protect your engine from overheating or inefficient cooling.

• Integrated Housing Thermostat design for streamlined installation
• Compatible with Lexus GS460, GS F, GX460, IS500, IS F, Land Cruiser, LC500, LS460, LS600h, LX570, RC F, Sequoia, and Tundra
• Durable construction using plastic, stainless steel, and copper materials
• Includes a rubber gasket/seal and a bleeder hole for efficient coolant flow
• Features 3 bolt holes and 1 outlet port with a 1.20-inch diameter
• Jiggle pin included to aid in air bleeding during installation

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 replacement and reducing potential leak points. This design enhances reliability and ensures consistent engine temperature control, which is critical for the performance and longevity of Lexus and Toyota engines. The 637-180 part number represents a precise fit and function for various models requiring a 180°F opening temperature thermostat.

Product Details and Specifications

This engine coolant thermostat housing assembly is constructed from a combination of plastic, stainless steel, and copper to balance durability and corrosion resistance. The black housing includes a rubber gasket to provide a secure seal and prevent coolant leaks. The thermostat opens at 180 degrees Fahrenheit, which is the standard operating temperature for the compatible Lexus and Toyota vehicles. The assembly features a bleeder hole and a jiggle pin to facilitate air removal from the cooling system, improving coolant circulation and engine temperature regulation.

Common Applications and Problem Resolution

• Replacement for faulty or leaking thermostat housings in Lexus GS460, IS500, and Toyota Tundra
• Solves engine overheating caused by stuck thermostats
• Prevents coolant leaks due to worn or damaged seals
• Addresses poor engine temperature regulation affecting fuel efficiency
• Eliminates air pockets in the cooling system with integrated bleeder hole and jiggle pin

Installation Notes and Tips

Installation requires removal of the old thermostat housing and careful cleaning of the mounting surface. The included rubber gasket should be properly seated to ensure a leak-free seal. Note that mounting hardware and bolts are not included, so original bolts should be reused or replaced as needed. The jiggle pin and bleeder hole assist in removing trapped air during coolant refilling. No special installation tools are included with this part.

Quality Assurance and Warranty

Motorad's Integrated Housing Thermostat assemblies are manufactured to meet OEM specifications for fit and function. The 637-180 part number undergoes quality control to ensure reliable operation within the specified 180°F opening temperature. While specific warranty details are not provided, Motorad products typically adhere to industry standards for durability and performance.