A snap-fit engine cover assembly provides multiple customized panels that cover and protect critical engine components which are revealed upon removal of engine component covers. Removing the covers from the engine block may be necessary for repairs, rebuilding, and storage of the engine block. The panels are shaped and dimensioned to substantially match the contour of the formed openings and crevices. The edges of the panels are sufficiently resilient and have recessed grooves that form a snap-fit relationship with the perimeter of the engine component openings. In addition to the snap-fit mating, the panels have fastener apertures that align with engine block apertures; thereby enabling fasteners to pass through for reinforcing the attachment of the panels over the formed openings in the engine block. A cardboard rectangular panel is also used along the sidewall of the engine block to protect against paint when painting portions of the engine block.