The present invention relates to an oil pan block provided with an oil separating plate of an oil storage means for an automobile, and the oil separating plate 2 and the oil pan block 1 are integrally casted by a die casting method, so that the oil separating plate 2 is formed. There is no need to weld separately, which improves productivity by eliminating machining work. In the process of casting, ribs 4 are provided on the inner surface of the oil pan block 1 so that the oil pan block 1 and the oil isolating plate 2 are separated. The strength is to be increased.
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