An electric motor cooling jacket enclosing a surface of an electric motor stator and having protuberances adapted for contact with the surface of the stator, with fluid passageways formed by the cooling jacket body, the protuberances, and the surface of the electric motor stator, wherein the fluid passageways are arranged to permit a cooling fluid to flow in a serpentine path across the surface of the stator to remove heat from the stator. Spray rings are fluidly coupled with the fluid passageways so as to permit the cooling fluid to flow into the fluid passageways, across the outer circumference of the electric motor stator, and out from orifices in the spray rings to cool the windings of the stator. The protuberances are formable using a pair of mold halves aligned anti-symmetrically with one another so that a serpentine fluid path is formed when casting the cooling jacket body.