This Ford Motorcraft valve cover gasket set is designed for the right side (passenger side) upper and lower valve cover sections on 2008–2010 Ford 6.4L Power Stroke engines. The 6.4L uses a multi-piece rockers and valve cover arrangement, and this gasket set provides the correct sealing profile for the passenger-side cylinder head on F-250 and F-350 Super Duty trucks.
Factory gaskets on the 6.4L Power Stroke can harden and lose elasticity over time from exposure to heat, oil, and clamping force. Once the material takes a permanent set, oil seepage often appears along the valve cover perimeter or near injector harness pass-throughs. Replacing the right-side upper and lower gaskets whenever the valve cover is removed helps restore a dependable seal and reduces the chance of recurring oil leaks.
As an OE Motorcraft component, this gasket set is molded to match the original cover and rocker box geometry and is formulated to withstand the temperature cycles and oil environment common to turbocharged diesel engines. That makes it a strong choice for daily driven work trucks, heavy towing rigs, and fleet units where long-term reliability and minimal oil leaks are priorities.
Using proper OEM gaskets also helps ensure that sealing is maintained around critical areas like bolt holes and any electrical or injector wiring pass-throughs, which can be leak-prone if low-quality gaskets are reused or substituted. When the sealing surfaces are thoroughly cleaned and the valve cover bolts are torqued correctly, a fresh gasket set can keep the top end of the 6.4L cleaner and easier to service down the road.
For owners looking for a “right side 6.4 Power Stroke valve cover gasket,” “8C3Z-6584-B passenger-side gasket set,” or “Motorcraft valve cover gasket 2008–2010 6.4L,” this part offers an OEM-quality solution tailored specifically to the 6.4L Power Stroke platform.
