Motorad 5242-180 Engine Coolant Thermostat

Motorad UltraStat 180°F Thermostat

Motorad UltraStat part number 5242-180 is an engine coolant thermostat built for direct-fit cooling system service on select Honda, Acura, Ford, and Toyota applications. It uses heavy-gauge stainless steel construction for corrosion resistance and long-term durability, with BLVT valve technology to help reduce thermal shock in the cooling system.

The UltraStat line focuses on precise temperature control and dependable operation in OE-style replacement applications. This 180°F thermostat is a strong match for drivers searching for a 180°F engine coolant thermostat for Honda Civic, Honda Accord, Acura Integra, or similar fitments.

Key Features

• 180°F opening temperature for factory-style cooling system regulation
• Heavy-gauge stainless steel construction for corrosion resistance
• BLVT valve technology to help minimize thermal shock to cooling components
• Jiggle pin weep hole included for air bleeding during service
• Sealing flange outside diameter: 2.04 in.
• Bypass diameter: 1.09 in.; bypass length: 1.37 in.
• Flange thickness: 0.05 in.
• Gasket or seal not included

Detailed Description

Motorad 5242-180 is an UltraStat engine coolant thermostat engineered for vehicles that call for a 180°F thermostat. The stainless steel design supports corrosion resistance in demanding cooling environments, while the valve design is intended to promote smoother coolant flow changes during warm-up and temperature regulation. This makes it a practical OE-style replacement for applications such as 2003-2005 Honda Civic, 1990-1993 Honda Accord, 1999-2001 Acura Integra, and 2013-2014 Ford Transit. This part cross-references Dorman - Autograde 45878 for the same application.

Common Uses

• Restoring proper engine operating temperature control
• Replacing a thermostat stuck open or stuck closed
• Addressing slow warm-up or unstable coolant temperature
• Correcting overheating caused by thermostat restriction or failure
• Servicing cooling systems that require a 180°F thermostat

Installation Notes

Verify the sealing flange diameter, bypass dimensions, and temperature rating before installation. The jiggle pin weep hole should be positioned to help purge trapped air during filling. Because the gasket or seal is not included, reuse is not recommended unless the existing seal is confirmed serviceable and the application allows it. Confirm the vehicle’s original thermostat specification before installing Motorad 5242-180.

Quality Assurance

Motorad UltraStat thermostats are built with stainless steel construction and valve technology focused on stable coolant control and corrosion resistance. The part number 5242-180 is listed with direct interchange references for common OE-style replacement use.