The piston casting inner cold oil leakagel can meet the European Ⅱ emissions standards.The long axis outside diameter 104, pin hole diameter 38, total height 104.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.