Abstract: The oil deflector apparatus can be installed in an internal combustion engine to deflect oil from gaskets mounted between an upper deck assembly and the engine block. The apparatus has a first portion that extends lengthwise along the upper deck assembly and includes mounting holes that accept mounting hardware to couple the apparatus to the engine block. A second portion is coupled lengthwise along the first portion and is angled downward to cover any exposed surface of the gasket from the internal oil generated by the engine operation. Layshaft support extensions are distributed lengthwise along the apparatus to permit the apparatus to fit around the layshaft support hardware in the engine and to keep oil splashed from the layshaft from reaching the gasket.