Thermostat Housing Gasket Genuine 4R3Z-8C387-A for Ford 2002-2010

Genuine Thermostat Housing Gasket 4R3Z-8C387-A for Ford 2002-2010

Original Quality and Cooling System Sealing

The Genuine Ford thermostat housing gasket with part number 4R3Z-8C387-A is an original component of the cooling system (Genuine OEM), specifically designed for vehicles of the Ford Motor Company. This seal is installed between the thermostat housing and the engine's intake manifold or water pipe. Using the original part ensures a perfect surface fit, which is critically important to prevent coolant leaks under pressure. Thanks to precise adherence to factory tolerances, the gasket provides reliable sealing of the unit, preventing engine overheating and corrosion of mating parts.

Advanced Materials for Extreme Conditions

The product is made of specialized high-temperature silicone (silicone rubber) in blue color. This material has increased resistance to thermal aging and constant contact with aggressive chemical compositions of modern ethylene glycol-based coolants. Unlike standard black rubber, this material retains its elasticity and shape during multiple heating and cooling cycles, does not harden or crack over a long service life. The special profiled shape of the ring with locking protrusions allows the part to be securely held in the housing groove during installation, preventing displacement or pinching of the seal.

Installation Recommendations and Maintenance

The 4R3Z-8C387-A gasket is classified as a consumable item, requiring mandatory replacement each time the thermostat housing is disassembled or the thermostat itself is replaced. In cooling system diagrams, the part is usually designated under numbers 10 or 17. Installing a new original seal avoids repeated labor costs for disassembling the unit due to sudden leaks. Before installation, ensure the seating area is clean and free of cavities on the metal surface of the housing. Proper installation of this ring restores the factory sealing of the unit and ensures uninterrupted circulation of the coolant.

Detailed Compatibility by Car Models

This seal is used on a wide range of Ford, Lincoln, and Mercury vehicles, predominantly equipped with 4.6L and 5.4L V8 engines:

• Ford Mustang: 2005, 2006, 2007, 2008, 2009, 2010 (4.6L V8 engines)

• Ford F-150: 2004, 2005, 2006, 2007, 2008, 2009, 2010 (4.6L and 5.4L V8 engines)

• Ford Expedition: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014

• Ford Explorer: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 (4.6L V8 engines)

• Ford Explorer Sport Trac: 2007, 2008, 2009, 2010

• Ford F-250 / F-350 Super Duty: 2005, 2006, 2007, 2008, 2009, 2010 (5.4L V8 engines)

• Lincoln Navigator: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014

• Lincoln Town Car: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011

• Mercury Grand Marquis: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011

• Mercury Mountaineer: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

Technical Specifications

• Brand: Ford

• Brand Registration Country: USA

• Condition: new

• Product Group: cooling system parts

• Purpose: engine thermostat housing sealing

• Material: silicone

• Color: blue

• Weight: 12 g

• Outer Diameter: 62 mm

• Inner Diameter: 54 mm

• Section Thickness: 4 mm

• Part Number (OEM): 4R3Z-8C387-A

• Engineering Number: 4R3Z8C387A

• Short Catalog Number: 8C387

• Part Type: Genuine OEM (original)

• Compatibility: Ford Modular V8 engines (4.6L SOHC/DOHC, 5.4L 3V)

• Working Environment: antifreeze, water, glycol-based coolants

• Heat Resistance: retains properties up to +175°C

• Features: presence of locking protrusions on the outer contour for displacement protection

• Package Contents: sealing ring — 1 pc.

• Section Shape: rectangular with rounded edges (profiled)

• Packaging Type: polyethylene bag with Ford Genuine Parts branding