Motorad 5328-170 Engine Coolant Thermostat

Motorad UltraStat 170F Thermostat

Motorad UltraStat Part Number 5328-170 is an engine coolant thermostat built for Honda and Acura applications that call for a 170 degree Fahrenheit opening temperature. It uses heavy-gauge stainless steel construction for corrosion resistance and long service life, with BLVT valve technology to help reduce thermal shock in the cooling system.

Key Features

• 170°F engine coolant thermostat for OE-specified applications
• Heavy-gauge stainless steel construction for durability and corrosion resistance
• BLVT valve technology helps moderate coolant flow changes
• Jiggle pin weep hole included for air bleeding during service
• Sealing flange outside diameter: 2.05 in.
• Bypass diameter: 1.09 in.; bypass length: 1.41 in.
• Flange thickness: 0.05 in.
• No gasket or seal included

Product Details

The Motorad UltraStat line is focused on thermostat durability and stable temperature control. This 5328-170 thermostat is built with stainless steel components to resist corrosion in demanding cooling systems, while the valve design helps smooth coolant flow transitions. It is a direct-fit style thermostat for a wide range of Honda Civic, Honda Fit, Honda Accord, Honda CR-V, Honda Odyssey, Honda Prelude, Honda CR-Z, Honda Insight, Honda City, Honda HR-V, Acura ILX, and Acura EL applications that specify a 170°F thermostat.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Engine running hotter than normal due to a worn thermostat
• Slow warm-up or unstable operating temperature
• Coolant flow issues caused by sticking thermostat valves
• Corrosion-related thermostat failure in the cooling system
• Air pockets during cooling system service, aided by the jiggle pin weep hole

Installation Notes

Verify the OE temperature specification before installation, since this thermostat is rated at 170°F. The gasket or seal is not included, so reuse is not recommended if the existing seal is damaged or compressed. Confirm bypass dimensions and flange size against the original part, and bleed the cooling system carefully after installation to remove trapped air.

Quality Assurance

Motorad UltraStat thermostats are engineered with stainless steel construction and valve technology aimed at consistent cooling-system operation. Part Number 5328-170 is built for applications that require a 170°F thermostat and is backed by Motorad product engineering standards.