Abstract: An oil deflector assembly includes an oil deflector plate for attachment between a crankshaft and an oil pan. The oil deflector plate assembly further includes a plurality of nuts and washers rotatably captured and retained by the plate for attaching the plate with respect to an engine block. The captured nuts and washers are preassembled to the plate, thereby improving engine assembly efficiency. In a preferred embodiment, the threaded hole of each nut is tapered to improve alignment with a corresponding threaded stud, and the washer includes a tapered hole to facilitate washer deformation thereby to lock the washer against the plate.