Fel-Pro 35858 Engine Coolant Thermostat Seal

Fel-Pro 35858 Engine Coolant Thermostat Seal

Fel-Pro 35858 is a premium engine coolant thermostat seal built for direct-fit sealing performance. It uses application-specific materials to help maintain a reliable seal in cooling system service on vehicles such as the Cadillac CTS, Chevrolet Traverse, and GMC Acadia.

Key Features

• Premium-grade thermostat seal for cooling system service
• Application-specific sealing material for vehicle-specific fitment
• Engine coolant thermostat seal for leak control at the thermostat housing
• Mounting hole quantity: 0
• Cross-reference: MAHLE C32213

Detailed Description

Fel-Pro 35858 is an engine coolant thermostat seal engineered for sealing the thermostat interface in the cooling system. Fel-Pro focuses on vehicle-specific sealing solutions, and this part follows that approach with premium materials selected for the application. It is compatible with a wide range of GM and Saab vehicles, including 2004-2019 Cadillac CTS, 2009-2022 Chevrolet Traverse, and 2009-2016 GMC Acadia. The part number 35858 is also referenced by interchange number 12582472.

What It Helps Address

• Coolant seepage at the thermostat seal surface
• Loss of sealing integrity during thermostat service
• Coolant odor or visible residue around the housing
• Temperature control issues caused by sealing leaks
• Repeat repairs from worn or flattened sealing material

Installation Notes and Tips

Install the seal on a clean, dry mating surface and inspect the thermostat housing for corrosion, pitting, or distortion before assembly. Verify the thermostat and housing match the vehicle application before installation. Confirm fitment by year, make, and model, including 2022-2024 Cadillac CT4, 2010-2017 Chevrolet Equinox, and 2010-2017 GMC Terrain. Use the correct cooling system service procedure and refill with the specified coolant after installation.

Quality Assurance

Fel-Pro gaskets are built around vehicle-specific sealing materials and application-focused design to support dependable sealing performance in professional repair work.