Cylinder block for internal combustion engine, has intermediate portion provided between upper portion and lower portion of coolant jacket, and having width larger than first width of upper portion and second width of lower portion

摘要

An intermediate portion, provided between the upper portion and the lower portion of a coolant jacket (34), has a width which larger than the first width of the upper portion and the second width of the lower portion. An independent claim is included for a cylinder block manufacturing method.