Fel-Pro 35497 Engine Coolant Thermostat Housing Gasket - Left Outer or Outer

Fel-Pro 35497 Thermostat Housing Gasket

Fel-Pro 35497 is an engine coolant thermostat housing gasket built for sealing performance in cooling system service. It uses application-specific materials and a premium-grade construction to help deliver a precise seal for the thermostat housing on select Nissan, Infiniti, and Mercury applications.

Compatible With 1989-2002 Nissan Maxima, Outer; 1993-2002 Nissan Quest, Outer; 1996-2000 Nissan Pathfinder, Outer; 1997-2000 INFINITI QX4, Outer; and 1993-2002 Mercury Villager, Outer/Left Outer, this gasket is sized for the listed housing locations and fitment patterns. The Fel-Pro 35497 thermostat housing gasket is a direct-fit sealing solution for cooling system maintenance.

Key Features

• Engine coolant thermostat housing gasket for sealing the thermostat housing to the engine or coolant passage
• Premium grade type for service-focused sealing performance
• Inside diameter: 2.400 in. (60.9 mm)
• Thickness: 0.030 in. (0.7 mm)
• Mounting hole quantity: 4
• Application-specific material selection for vehicle-matched sealing
• Cross-reference part number: MAHLE C39115

Detailed Description

Fel-Pro 35497 is engineered as an engine coolant thermostat housing gasket for select Nissan Maxima, Nissan Quest, Nissan Pathfinder, INFINITI QX4, and Mercury Villager applications. The gasket dimensions, including the 2.400-inch inside diameter and 0.030-inch thickness, support a proper seal at the thermostat housing interface where coolant control and temperature regulation depend on leak-free assembly. Fel-Pro’s sealing approach focuses on vehicle-specific materials to match the demands of the application and maintain consistent sealing performance during cooling system service.

This part number, 35497, is a practical choice when replacing a worn or damaged thermostat housing gasket on the listed vehicles. It cross-references MAHLE C39115 for the same application.

Common Problems This Part Can Address

• Coolant seepage at the thermostat housing
• Visible gasket deterioration or compression set
• Sealing loss after thermostat housing service
• Coolant odor or residue around the housing area
• Temperature control issues caused by a compromised seal

Installation Notes and Tips

• Clean both sealing surfaces thoroughly before installation.
• Inspect the thermostat housing for warpage, corrosion, or pitting before reassembly.
• Verify the housing orientation and position match the vehicle listing, including Outer and Left Outer applications where specified.
• Use the correct coolant and follow the vehicle service procedure after installation.
• Confirm fitment by year, make, model, and position before ordering; Fel-Pro 35497 is listed for 1989-2002 Nissan Maxima, 1993-2002 Nissan Quest, 1996-2000 Nissan Pathfinder, 1997-2000 INFINITI QX4, and 1993-2002 Mercury Villager.

Quality Assurance

Fel-Pro gaskets are known for application-specific sealing materials and vehicle-focused design. That engineering approach supports consistent fit and sealing performance for cooling system repairs involving the thermostat housing.