Abstract: A piston assembly is disclosed which includes a crown and a skirt. The crown and skirt may cooperate to form a cooling gallery. The crown may include an axial support extending away from the combustion bowl, and radially inner and outer support surfaces that are abutted against corresponding radially inner and outer support surfaces of the skirt. The axial support may have a first diameter and a second diameter larger than the first diameter. The skirt may define an aperture receiving the first diameter of the axial support such that the second diameter of the axial support is supported in the skirt on a side of the aperture opposite the crown. The corresponding radially inner and outer support surfaces of the crown and skirt may each be abutted with a radially inner preload, and a radially outer preload, respectively.

Abstract: A piston assembly is disclosed which includes a crown and a skirt. The crown and skirt may cooperate to form a cooling gallery. The crown may include an axial support extending away from the combustion bowl, and radially inner and outer support surfaces that are abutted against corresponding radially inner and outer support surfaces of the skirt. The axial support may have a first diameter and a second diameter larger than the first diameter. The skirt may define an aperture receiving the first diameter of the axial support such that the second diameter of the axial support is supported in the skirt on a side of the aperture opposite the crown. The corresponding radially inner and outer support surfaces of the crown and skirt may each be abutted with a radially inner preload, and a radially outer preload, respectively.