Fel-Pro 35284 Engine Coolant Thermostat Seal

Fel-Pro 35284 Engine Coolant Thermostat Seal

Fel-Pro 35284 is a premium engine coolant thermostat seal built for direct-fit sealing performance in select Ford and Mercury applications. It uses application-specific materials to help maintain a reliable coolant seal where the thermostat housing meets the engine cooling system.

Key Features

• Engine coolant thermostat seal for sealing the thermostat assembly
• Premium grade construction for professional repair use
• Inside diameter: 1.804 in. / 45.8 mm
• Thickness: 0.245 in. / 6.2 mm
• Mounting hole quantity: 0
• Fel-Pro 35284 for accurate fitment in supported cooling system applications

Detailed Description

Fel-Pro 35284 is engineered as a thermostat seal for vehicles that require a precise coolant-side sealing surface. Fel-Pro gaskets are known for application-specific materials that support dependable sealing performance, and this seal follows that approach with dimensions sized for the intended thermostat housing interface. It is a practical choice for cooling system service on Ford Escort, Ford Focus, Ford Contour, Mercury Cougar, and Mercury Mystique applications covered by the fitment data. If you are replacing a worn thermostat seal on a 1995-2000 Ford Contour or a 2000-2003 Ford Focus, Fel-Pro 35284 provides the correct sealing component for the job.

This part cross-references MAHLE C31612 for the same application.

What It Helps Address

• Coolant seepage at the thermostat housing
• Loss of seal after thermostat service
• Coolant odor or visible residue around the cooling connection
• Improper sealing caused by a flattened or aged thermostat seal
• Repeat cooling system leaks after maintenance

Installation Notes and Tips

Inspect the thermostat housing and mating surfaces before installation. Remove old gasket material, corrosion, and coolant residue so the new seal can seat evenly. Confirm the seal dimensions match the application before assembly, and follow the vehicle service procedure for coolant refill and bleed steps after repair. Compatible With 1995-2000 Ford Contour, N/A; 1995-2000 Mercury Mystique, N/A; 1998-2003 Ford Escort, N/A; 1999-2002 Mercury Cougar, N/A; 2000-2003 Ford Focus, N/A.

Quality Assurance

Fel-Pro uses application-specific sealing materials to support consistent fit and durability in professional repair environments. Part number 35284 is built for the cooling system sealing task specified by the manufacturer.