Motorad 5426-190 Engine Coolant Thermostat

Motorad UltraStat Thermostat 5426-190

Motorad UltraStat 5426-190 is an engine coolant thermostat built for Ram and Dodge Ram truck applications that call for a 192 degree Fahrenheit opening temperature. It combines stainless steel construction, a rubber seal, and a jiggle pin weep hole to support stable coolant control in demanding cooling systems.

Key Features

• 192 degree Fahrenheit thermostat calibration for OE-specified cooling control
• Heavy-gauge stainless steel construction for corrosion resistance and durability
• BLVT valve technology helps reduce thermal shock to cooling system components
• Includes rubber gasket/seal for installation
• Jiggle pin weep hole supports air bleeding during service
• Sealing flange outside diameter: 2.28 in
• Bypass diameter: 1.14 in; bypass length: 1.10 in
• Flange thickness: 0.05 in

Product Details

The Motorad UltraStat line focuses on thermostat construction that holds up under repeated heat cycles. For Ram 2500, Ram 3500, Ram 4000, and Dodge Ram 2500 or Ram 3500 cooling system service, part number 5426-190 provides a direct-fit thermostat solution with a 192 degree opening point and a sealed design. The stainless steel body resists corrosion, while the BLVT valve design helps moderate coolant flow changes to reduce stress on nearby components. This part cross-references Wix 46289 for the same application.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Coolant flow irregularities caused by a sticking thermostat
• Corrosion-related thermostat failure in the cooling system
• Air trapped in the cooling circuit after service
• Temperature control issues on Ram and Dodge Ram truck applications

Installation Notes and Tips

Verify the housing surface is clean before installation and replace the thermostat with the seal supplied in the package. The jiggle pin weep hole should be oriented to help purge trapped air during refill. Confirm the 192 degree Fahrenheit specification and match the application to the vehicle year and model before service. Fits 2021-2025 Ram 2500, N/A; Fits 2021-2025 Ram 3500, N/A; Fits 2011-2020 Ram 2500, N/A; Fits 2011-2020 Ram 3500, N/A; Fits 2011-2013 Ram 4000, N/A; Fits 2009-2010 Dodge Ram 2500, N/A; Fits 1998-2010 Dodge Ram 2500, N/A; Fits 1998-2010 Dodge Ram 3500, N/A.

Quality Assurance

Motorad UltraStat thermostats are built with stainless steel construction and corrosion-resistant materials to support long service life in cooling system applications. Part number 5426-190 is engineered to meet the specified temperature range for the listed Ram and Dodge Ram truck fitments.