The piston casting inner cold oil leakagel can meet the European Ⅱ emissions standards.The long axis outside diameter 120, pin hole diameter 45, total height 122.4.Using the Mahle124 as body material,high wear resistant cast iron junk rings, it is features corrosion resistance and good wear resistance. With the iphosphorus noculation ,the expansion paramete is smaller,Resistance better and tensile strength higher.