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Core plugs were initially designed merely as a necessary engine block component which was made necessary due to the "sand casting" method used to initially form an engine block. After the initial casting of the engine block, core plugs were designed to plug off the "sand exit ports" of the newly formed engine block. Only many years after they ...
During the casting process, the molten aluminum is injected into the mold and burns off the resin, leaving an area of localized hypereutectic aluminum only in the area of the cylinder bore. The silicon particles are then mechanically exposed in a similar process to an Alusil block resulting in a cylinder block that functions in the same way as ...
A core is a device used in casting and moulding processes to produce internal cavities and reentrant angles (an interior angle that is greater than 180°). The core is normally a disposable item that is destroyed to get it out of the piece. [1] They are most commonly used in sand casting, but are also used in die casting and injection moulding.
A cylinder block is a structure that contains the cylinder, plus any cylinder sleeves and coolant passages. In the earliest decades of internal combustion engine development, cylinders were usually cast individually, so cylinder blocks were usually produced separately for each cylinder.
Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand—known as casting sand—as the mold material. The term "sand casting" can also refer to an object produced via the sand casting process. Sand castings are produced in specialized factories called foundries. In 2003, over 60% of all metal ...
AlSi eutectic casting alloys are used for machine parts, cylinder heads, cylinder crankcases, impellers and ribbed bodies. Hypereutectic (high silicon) alloys are used for engine parts because of low thermal expansion and high strength and wear resistance. This also includes special piston alloys with around 25% Si. [26]
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GM also made extensive use of economies of scale for the LS: with the exception of the 4.8L and 7.0L engines, all variants used the same 3.622" stroke (with most of those variants using the same basic crankshaft casting), the 4.8L and 5.3L variants utilized the same block casting, and several variants used the same length connecting rod. [39]