11. One mistake we often see is excessive use of sealer. All you need is a thin film of Permatex’s The Right Stuff on clean surfaces and you won’t have leaks. Where end rail rubber gaskets meet side gaskets, apply a dab of The Right Stuff at the joints and carefully install the pan. Do not overtighten fasteners. Snug in a crisscross fashion and slowly tighten to specs found in your Ford Shop Manual.