Fel-Pro 35646 Engine Coolant Thermostat Housing Gasket

Fel-Pro 35646 Thermostat Housing Gasket

Fel-Pro 35646 is an engine coolant thermostat housing gasket built for direct sealing performance in Toyota cooling system service. It uses application-specific materials to help deliver a precise seal for Toyota Tacoma, Tundra, 4Runner, and T100 applications.

Key Features

• Engine coolant thermostat housing gasket for sealing the thermostat housing to the engine
• Premium grade construction for service-focused cooling system repairs
• 0.030 in. / 0.7 mm thickness for accurate fit and sealing surface contact
• 3 mounting holes for the listed applications
• Fel-Pro sealing technology engineered for 100% vehicle sealing in the intended application
• Cross-references MAHLE C31165 and C32618 for the same application

Detailed Description

Fel-Pro 35646 thermostat housing gasket is made for cooling system maintenance where a dependable seal matters. The gasket thickness and premium-grade material selection support proper compression at the thermostat housing, helping maintain a secure seal on Toyota Tacoma, Toyota Tundra, Toyota 4Runner, and Toyota T100 models. If you are replacing a thermostat housing gasket on a 1995-2004 Toyota Tacoma or a 2000-2004 Toyota Tundra, this part number provides the correct sealing solution for the listed fitments. Fel-Pro 35646 is also a direct match for 1996-2002 Toyota 4Runner and 1995-1998 Toyota T100 applications.

What It Helps Fix

• Coolant seepage at the thermostat housing
• External coolant leaks around the housing flange
• Loss of sealing after thermostat service
• Improper gasket compression from worn or damaged old material
• Cooling system service issues on Toyota Tacoma, Tundra, 4Runner, and T100 models

Installation Notes and Tips

Clean both sealing surfaces thoroughly before installation and verify the housing is free of corrosion, old gasket material, and debris. Confirm the thermostat housing and mating surfaces are flat before installing the gasket. This part fits 1995-2004 Toyota Tacoma, 2000-2004 Toyota Tundra, 1996-2002 Toyota 4Runner, and 1995-1998 Toyota T100. Use the vehicle-specific fitment details to confirm the correct application before service.

Quality Assurance

Fel-Pro gaskets are built with application-specific materials and sealing design focused on reliable vehicle sealing. Part number 35646 is backed by Fel-Pro’s reputation for professional-grade sealing solutions used in cooling system repairs.