Motorad 5203-195 Engine Coolant Thermostat

Motorad UltraStat 195°F Thermostat

Motorad UltraStat part number 5203-195 is an engine coolant thermostat built for stable temperature control in a wide range of GM, Suzuki, Geo, Isuzu, and Pontiac applications. It is set to 195°F to match OEM-style operating temperature requirements for vehicles such as the Chevrolet S10, GMC Sonoma, and Chevrolet Camaro.

Key Features

• 195°F opening temperature for OEM-spec cooling system operation
• Heavy-gauge stainless steel construction for corrosion resistance and durability
• BLVT valve technology helps reduce thermal shock to cooling system components
• Sealing flange outside diameter: 1.73 in
• Flange thickness: 0.04 in
• No gasket or seal included
• No jiggle pin weep hole
• No installation tool included

Product Details

The Motorad UltraStat line focuses on durable thermostat construction and controlled coolant flow. This 5203-195 thermostat uses stainless steel materials for long service life and corrosion resistance, while the BLVT valve design helps moderate temperature changes as the engine warms up and cycles under load. It cross-references Stant 45849 for the same application. This part number 5203-195 is a direct fit for many 1980s through early 2000s vehicles, including Chevrolet S10, GMC Sonoma, and Pontiac Firebird applications.

Common Uses

• Correcting engine temperature that runs too cool or too warm
• Restoring proper heater performance after thermostat wear
• Replacing a thermostat stuck open or stuck closed
• Addressing temperature fluctuation during idle or highway driving
• Maintaining OEM-style coolant regulation in compatible Chevrolet, GMC, Suzuki, and Pontiac models

Installation Notes

Verify the 195°F temperature rating and sealing flange dimensions before installation. Because no gasket or seal is included, reuse is not recommended if the existing seal is worn or damaged. Clean the housing mating surfaces thoroughly and inspect the cooling system for contamination, coolant condition, and housing wear before installing the new thermostat. Confirm vehicle-specific fitment for the exact year, make, and model listed in the application data.

Quality Assurance

Motorad UltraStat thermostats are built with stainless steel construction and valve technology aimed at consistent coolant control and corrosion resistance. The design is intended to support reliable temperature regulation across the listed applications, including Chevrolet S10, GMC Sonoma, and Chevrolet Camaro fitments.