Fel-Pro 35774 Engine Coolant Thermostat Seal

Fel-Pro 35774 Engine Coolant Thermostat Seal

Fel-Pro 35774 is a premium engine coolant thermostat seal built for direct sealing performance in select Toyota applications. It uses application-specific materials and precise dimensions to help maintain a reliable coolant seal where the thermostat housing meets the engine.

Key Features

• Inside diameter: 2.245 in. / 57.0 mm
• Thickness: 0.218 in. / 5.5 mm
• Premium grade construction
• Mounting hole quantity: 0
• Engine coolant thermostat seal for sealing-system service
• Fel-Pro sealing technology focused on vehicle-specific fitment

Product Details

Fel-Pro 35774 is engineered as an OE-style thermostat seal for cooling system repairs that require accurate sealing at the thermostat housing. The seal’s 57.0 mm inside diameter and 5.5 mm thickness are important dimensions for achieving proper compression and coolant containment. Fel-Pro gaskets are known for application-specific materials and sealing solutions that professionals rely on for consistent fit and durability. This part cross-references OE-style numbers such as 114091 and 1632631010 for the same application.

Compatible With 2003-2005 Toyota 4Runner, 2005 Toyota Tacoma, and 2005 Toyota Tundra. If you are servicing a Toyota 4Runner thermostat housing, a Toyota Tacoma cooling system, or a Toyota Tundra thermostat seal replacement, Fel-Pro 35774 provides the specified sealing profile for those applications.

Common Repair Uses

• Replacing a worn thermostat seal during cooling system service
• Addressing coolant seepage at the thermostat housing
• Restoring a proper seal after thermostat replacement
• Correcting sealing issues caused by age, heat cycling, or compression loss
• Supporting maintenance on Toyota 4Runner, Tacoma, and Tundra cooling systems

Installation Notes and Tips

Inspect the thermostat housing and mating surfaces before installation. Remove old gasket material, clean the sealing surfaces thoroughly, and verify the seal seats evenly without twisting or pinching. Confirm the thermostat and housing are correct for the vehicle before reassembly. For fitment-specific service, use Fel-Pro 35774 on 2003-2005 Toyota 4Runner, 2005 Toyota Tacoma, and 2005 Toyota Tundra applications only.

Quality Assurance

Fel-Pro focuses on vehicle-specific sealing materials and professional-grade gasket design for dependable cooling system service. Part number 35774 is built to match the listed application requirements and sealing dimensions for the confirmed Toyota fitments.