Motorad 7298-180 Engine Coolant Thermostat

Engine Cooling Control for Toyota and Lexus

The Motorad Fail-Safe 7298-180 engine coolant thermostat is built for precise temperature control in demanding cooling systems. It uses a 180 degree F opening temperature, a copper case, and a wax compound for quick response to coolant temperature changes.

Compatible With Toyota Tacoma, Toyota 4Runner, Toyota Prius, Toyota Yaris, Lexus GS300, Lexus IS300, and other listed applications, this thermostat is designed for OE-style fit and dependable coolant regulation. The Fail-Safe design adds an extra layer of protection in overheating conditions.

Key Features

• 180 degree F thermostat temperature for OE-specified cooling control
• Fail-Safe design locks open during overheating events to keep coolant moving
• Copper case and wax compound for fast reaction to temperature changes
• Offset design with air relief valve where applicable
• Jiggle pin weep hole included for air bleeding during service
• OEM-style seals used where applicable for proper housing fit
• Motorad part number 7298-180 for direct reference and ordering

Detailed Description

Motorad Fail-Safe 7298-180 is an engine coolant thermostat manufactured to OEM quality materials, specifications, and processes by an OE supplier. The 180F calibration supports factory cooling strategy on many Toyota, Lexus, Scion, and Mitsubishi applications, including Toyota Tacoma, Toyota 4Runner, Toyota Prius, and Lexus GS300. This thermostat is built to respond quickly to coolant temperature changes and maintain stable engine operating temperature under normal driving conditions.

The Fail-Safe line is engineered to remain open after an overheating event, allowing coolant flow to continue rather than trapping heat in the system. This makes the Motorad 7298-180 a practical OE-style replacement for drivers servicing high-mileage cooling systems or replacing a thermostat during overheating diagnosis.

This part cross-references 79880 and P7298-180 for the same application.

What It Helps Address

• Engine overheating caused by a thermostat that sticks closed
• Slow warm-up or unstable coolant temperature control
• Cooling system service on Toyota Tacoma, Toyota 4Runner, and Toyota Prius applications
• Thermostat replacement on Lexus GS300 and Lexus IS300 models
• Cooling performance issues related to worn thermostat internals

Installation Notes and Tips

Verify the 180 degree F temperature rating and housing style before installation. This thermostat has a jiggle pin weep hole and a sealing flange outside diameter of 2.2 in, with bypass dimensions listed at 1.09 in diameter and 1.34 in length. A gasket or seal is not included, so confirm the correct seal or housing gasket for the vehicle before service.

Clean the mating surfaces thoroughly, bleed trapped air from the cooling system, and follow the vehicle service procedure for coolant refill and thermostat orientation. The offset design and air relief valve should be positioned according to the factory layout 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 fit and function in demanding automotive cooling systems.