Auto Parts Engine Piston 6M60 ME133274 For MITSUBISHI

The piston is mainly composed of the top, head and skirt. The shape of the top of the piston is related to the choice of combustion chamber. The head of the gasoline Engine piston generally adopts a flat top, which has the advantage of small heat absorption area and simple manufacturing process. Some use a concave top in order to change the formation of the mixture, and the size of the concave can also adjust the engine compression ratio.

The piston head is the part above the Piston Ring groove. Its role has three: withstand the gas pressure, and pass to the connecting rod; Cylinder seal with piston; The heat absorbed by the piston top is transferred to the cylinder wall through the piston ring. The head is cut with a number of ring grooves to install the piston ring, the gasoline engine generally has 2~3 to the ring groove, the above 1~2 for the gas ring, the following one for the installation of the oil ring. There are many radial holes drilled on the bottom of the oil ring groove, so that the excess oil scraped off by the oil ring flows back to the oil pan through the holes.