Engine crankcase firing deck having anti-distortion projections

A firing deck for an engine crankcase, the firing deck comprising:

• a generally planar firing side surface and a coolant side surface opposite the firing side surface;
• a plurality of cylinder bores through the firing deck from the firing side surface to the coolant side surface;
• a plurality of bosses through the firing deck from the firing side surface to the coolant side surface and disposed around each cylinder bore;
• a plurality of gusset formations disposed on the coolant side surface of the firing deck around each of the plurality of cylinder bores, at least one gusset formation is disposed between each of the plurality of bosses, wherein the plurality of gusset formations provide the firing deck with a varied thickness.

A firing deck for an engine crankcase, the firing deck comprising:

• a generally planar firing side surface and a coolant side surface opposite the firing side surface;
• a plurality of cylinder bores through the firing deck from the firing side surface to the coolant side surface;
• a plurality of bosses through the firing deck from the firing side surface to the coolant side surface and disposed around each cylinder bore;
• a plurality of bosses through the firing deck and disposed around each cylinder bore;
• at least one trapezoid formation disposed on the coolant side surface of the firing deck and located between two of the plurality of bosses, wherein the at least one trapezoid formation provides the firing deck with a varied thickness.