Diecasting tool for the production of a cylinder crankcase (2), comprising a salt core (4) and at least one cylinder sleeve (6), wherein the cylinder sleeve (6) comprises an upper end (8) on the cylinder head side, and a lower end (10) on the crankshaft side, and the cylinder sleeve (6) is supported on at least one center sleeve that is disposed on the diecasting tool, and the salt core (4) at least partially surrounds the cylinder sleeve (6) in the manner of a cladding, wherein the salt core (4) comprises a crown (12) that at least partially bears on one of the ends (8, 10) of the cylinder sleeve (6), and the core (4) comprising openings (14) that extend vertically beneath the end (8) of the cylinder sleeve (6) on the cylinder head side.