Fel-Pro 35981 Engine Coolant Thermostat Seal

Fel-Pro 35981 Engine Coolant Thermostat Seal

Fel-Pro 35981 is a premium engine coolant thermostat seal built for dependable sealing performance in cooling system service. It uses application-specific materials to help maintain a tight seal where the thermostat housing meets the engine, supporting consistent coolant control on select Buick, Chevrolet, and GM small-displacement applications.

Key Features

• Premium-grade thermostat seal for cooling system service
• Application-specific material selection for a precise sealing surface
• Engineered for 100% vehicle sealing in the intended application
• Direct replacement part number 35981 for service work
• Cross-references MAHLE C32639 and GM 55565619 for the same application

Fitment Details

• Fits 2013-2021 Buick Encore, N/A
• Fits 2013-2021 Chevrolet Trax, N/A
• Fits 2012-2020 Chevrolet Sonic, N/A
• Fits 2011-2016 Chevrolet Cruze, N/A
• Fits 2016 Chevrolet Cruze Limited, N/A

What This Seal Helps Address

• Coolant seepage at the thermostat sealing surface
• Loss of sealing integrity after thermostat service
• Moisture or residue around the thermostat housing area
• Cooling system leaks tied to a worn or damaged seal
• Repeat repairs caused by an improper sealing material

Installation Notes

Clean the mating surfaces thoroughly before installation and inspect the thermostat housing for damage, corrosion, or distortion. Verify the seal is positioned correctly during assembly so the thermostat housing can clamp evenly and maintain proper coolant sealing on Buick Encore, Chevrolet Trax, Chevrolet Sonic, and Chevrolet Cruze applications.

Quality Assurance

Fel-Pro sealing products are built with vehicle-specific materials and are trusted by professional technicians for cooling system repair. Part number 35981 is a premium thermostat seal designed to meet the sealing demands of the listed applications.