1998-2003 Ford PowerStroke 7.3L and Navistar T444E High Pressure Oil Pump Reservoir Gasket1998 2003 Ford PowerStroke 7. 3L and Navistar T444E High Pressure Oil Pump Reservoir Gasket This Oil Reservoir Gasket offers a cost savings advantage when servicing part of the vehicles timing cover. Our Oil Reservoir Gasket is now available as a separate component, enabling you to replace only the failed original gasket, instead of the entire timing cover assembly, saving time, money and labor. Additionally, this replacement part is easy to install