Motorad 5353KT Engine Coolant Thermostat Housing Assembly - Upper

Engine Coolant Thermostat Housing Assembly

Motorad 5353KT is a standard replacement thermostat housing assembly built with OEM-quality materials and manufacturing processes. It is engineered for cooling systems that need accurate temperature control, stable sealing, and consistent coolant flow.

Key Features

• OE supplier manufacturing with OEM specifications and processes
• Copper case and wax compound for quick response to coolant temperature changes
• Offset design with an air relief valve for improved cooling system serviceability
• Disk-style valve with a 180°F opening temperature
• Aluminum, stainless steel, and copper construction in a silver finish
• Bleeder hole and jiggle pin included in the design

Detailed Description

The Motorad 5353KT thermostat housing assembly is a direct-fit cooling system service part for a wide range of Toyota and Lexus applications, including Toyota Highlander, Toyota Camry, Toyota Avalon, Toyota Solara, Toyota Sienna, Lexus RX330, Lexus RX300, Lexus RX400h, Lexus ES330, and Lexus ES300. This part number 5353KT is built to OE standards and uses a mechanical actuator with a disk valve to regulate coolant flow at the specified opening temperature. The housing design includes OEM-style sealing features where applicable, while the offset layout and air relief valve support proper coolant routing and air management. Part number 5353KT is also cross-referenced to Motorad 5353KT for the same application.

What It Helps Address

• Coolant temperature control that is no longer staying within the expected range
• Delayed thermostat response during warm-up
• Air trapped in the cooling system after service
• Sealing issues at the thermostat housing interface
• Cooling system service on Toyota and Lexus vehicles with the listed fitments

Installation Notes and Tips

This assembly requires a separate gasket or seal, and mounting hardware is not included. Verify the housing orientation, outlet configuration, and fitment notes before installation, especially on Lexus RX330 applications with the listed upper-position and outlet-specific notes. Clean the mating surfaces thoroughly and inspect the cooling system for contamination before reassembly.

Quality Assurance

Motorad manufactures this thermostat housing assembly to OEM quality materials and safety standards as an OE supplier. The 5353KT is produced to OEM specifications for dependable fit and cooling-system performance in the listed Toyota and Lexus applications.