Motorad 5281-180 Engine Coolant Thermostat

Motorad UltraStat 5281-180 Thermostat

Motorad UltraStat 5281-180 is an engine coolant thermostat built for OE-style temperature control at 180 degrees F. It uses heavy-gauge stainless steel construction for corrosion resistance and long service life, with BLVT valve technology to reduce thermal shock in the cooling system.

Compatible with original equipment 180°F thermostat applications across Toyota, Lexus, Mitsubishi, Scion, Pontiac, Chevrolet, Ford, and Dodge fitments, including many Toyota Camry, Corolla, Highlander, RAV4, and Tacoma applications.

• 180°F engine coolant thermostat for factory-style operating temperature control
• Heavy-gauge stainless steel construction for durability and corrosion resistance
• BLVT valve technology helps minimize thermal shock to cooling system components
• Jiggle pin weep hole included for air bleeding during service
• No gasket or seal included
• Motorad UltraStat line focused on robust thermostat construction

Detailed Product Information

The Motorad UltraStat line is engineered for demanding cooling system service, and part number 5281-180 follows that approach with stainless steel construction and a 180°F opening temperature. The design supports stable coolant regulation in vehicles that rely on this OE temperature specification, including applications such as Toyota Camry, Toyota Corolla, Lexus ES350, and Toyota Tacoma. The flange measures 2.2 inches outside diameter, with a 1.14 inch bypass diameter and 1.74 inch bypass length.

This part cross-references Dorman - HELP 46078 and Four Seasons 46118 for the same application.

Common Cooling System Issues

• Engine running too cool or too warm due to thermostat wear
• Temperature fluctuation from a sticking thermostat valve
• Corrosion-related thermostat failure in high-mileage cooling systems
• Air trapped in the cooling system after service
• Thermal shock affecting nearby cooling components

Installation Notes and Tips

Verify the OE thermostat temperature specification before installation. This thermostat does not include a gasket or seal, so the correct sealing component must be sourced separately. The jiggle pin weep hole should be oriented to help purge trapped air during refill, and the cooling system should be properly bled after service to maintain stable operating temperature.

Quality Assurance

Motorad UltraStat thermostats are built with stainless steel construction and BLVT valve technology to support consistent cooling system performance and corrosion resistance.