Fel-Pro 35788 Engine Coolant Thermostat Housing Gasket

Fel-Pro 35788 Thermostat Housing Gasket

Fel-Pro 35788 is an engine coolant thermostat housing gasket built for a precise seal at the thermostat housing. It uses application-specific materials and a premium-grade construction to support reliable sealing on Lexus and Toyota cooling system repairs.

Key Features

• Engine coolant thermostat housing gasket for sealing the thermostat housing to the engine
• Premium grade material selection for dependable sealing performance
• 0.031 in. / 0.7 mm thickness for application-specific fit
• 3 mounting holes for correct alignment during installation
• Direct-fit service part for Lexus GS300, IS300, SC300, and Toyota Supra applications

Detailed Description

Fel-Pro 35788 is a thermostat housing gasket engineered for cooling system service where a clean, stable seal is critical. The gasket thickness and premium construction help match the sealing surface requirements of the application, supporting proper coolant containment at the thermostat housing. This part is used on 1993-2005 Lexus GS300, 2001-2005 Lexus IS300, 1992-2000 Lexus SC300, and 1993-1998 Toyota Supra models. This part cross-references OE-style numbers such as 1634346020 and C31448 for the same application.

What It Helps Fix

• Coolant seepage at the thermostat housing
• External coolant leaks around the housing flange
• Sealing issues after thermostat service
• Improper gasket fit from worn or damaged original sealing material
• Cooling system maintenance on Lexus GS300, IS300, SC300, and Toyota Supra engines

Installation Notes and Tips

Clean both mating surfaces thoroughly before installation and remove all old gasket material, corrosion, and coolant residue. Verify the housing and engine flange are flat and undamaged, then align the gasket using the 3 mounting holes before tightening the housing to the manufacturer’s torque specification. For best results, refill and bleed the cooling system after service and inspect for leaks once the engine reaches operating temperature.

Quality Assurance

Fel-Pro gaskets are built with application-specific sealing materials to deliver full vehicle sealing performance and durability trusted by professional technicians.