Motorad 298-192 Engine Coolant Thermostat

Engine Coolant Thermostat for Toyota and Mitsubishi

The Motorad Standard 298-192 engine coolant thermostat is an OE-style replacement built for precise coolant temperature control. With a 192°F opening temperature, copper case construction, and wax compound response, it supports stable engine warm-up and consistent cooling system operation in a wide range of Toyota, Lexus, Scion, and Mitsubishi applications.

Compatible With Toyota Tacoma, Toyota 4Runner, Toyota Prius, Toyota Yaris, Lexus GS300, Lexus IS300, and more listed applications, this thermostat is a direct-fit cooling system service part for vehicles that require a 192°F thermostat specification.

Key Features

• Motorad Standard line thermostat, part number 298-192
• 192°F temperature rating for OE-style engine temperature regulation
• Copper case and wax compound for quick response to coolant temperature changes
• Offset design with air relief valve
• Jiggle pin weep hole included for air bleeding where applicable
• OEM-style seals used where applicable for proper housing sealing
• Sealing flange outside diameter: 2.2 in
• Bypass diameter: 1.09 in
• Bypass length: 1.34 in
• Flange thickness: 0.05 in

Product Line Details

Motorad Standard focuses on OE-spec cooling system service parts manufactured to OEM quality materials and processes. The 298-192 thermostat follows that approach with a copper case, wax pellet actuation, and fitment details that match the cooling system requirements found in many Toyota and Mitsubishi platforms.

Detailed Description

The Motorad 298-192 thermostat is built for vehicles that call for a 192°F engine coolant thermostat. It is listed across multiple Toyota, Lexus, Scion, and Mitsubishi models, including Toyota Hiace, Toyota Tacoma, Toyota Hilux, Toyota 4Runner, Toyota Prius, Toyota Yaris, Lexus GS300, Lexus IS300, Scion xA, Scion xB, Mitsubishi Lancer, and Mitsubishi Outlander. This part cross-references 4109 and 29892 for the same application.

By regulating coolant flow based on temperature, the thermostat helps the engine reach operating temperature and maintain it under normal driving conditions. The offset design, air relief valve, and jiggle pin weep hole support proper coolant circulation and air management in the cooling system.

What It Is Used For

• Replacing a thermostat that is stuck open and causing slow warm-up
• Replacing a thermostat that is stuck closed and contributing to overheating
• Restoring correct engine operating temperature on 192°F applications
• Addressing temperature fluctuation caused by worn thermostat internals
• Servicing cooling systems on Toyota Tacoma, Toyota 4Runner, and Toyota Prius applications

Installation Notes and Tips

Verify the required thermostat temperature and housing dimensions before installation. This unit does not include a gasket or seal, and no installation tool is included. Inspect the thermostat housing, sealing surfaces, and coolant condition during service, and bleed trapped air from the system after installation using the air relief features where applicable.

Quality Assurance

Motorad manufactures this thermostat with OEM quality materials and safety standards as an OE supplier, using OEM specifications and processes for consistent cooling system service performance.