Hot runner feed system and diecasting mold arrangement, comprising - a diecasting mold having a fixed mold half and a movable mold half, and - a hot runner feed system comprising a melt manifold and feed block construction having an entry-side feed inflow opening, at least one first and one second exit-side feed outflow opening (2, 3) which open into a mold separation plane between the fixed and the movable mold half (4, 20), and a casting runner-duct structure that extends so as to branch out from the feed inflow opening to the feed outflow openings (2, 3), characterized in that - the melt manifold and feed block construction at least in an exit-side block region that includes the two feed outflow openings (2, 3) is made so as to be shortened in a transverse direction parallel with the mold separation plane in relation to a predefined nominal operating extent by an expansion dimension (Δm), and - the melt manifold and feed block construction comprises a melt manifold block having a first exit nozzle that is assigned to the first feed outflow opening, and a second exit nozzle that is assigned to the second feed outflow opening, and an intermediate plate having a first and a second nozzle fitting mouthpiece (18, 19) for fitting the exit nozzles in a centering manner, wherein the first feed outflow opening continues through the first nozzle fitting mouthpiece and the intermediate plate, and the second feed outflow opening continues through the second nozzle fitting mouthpiece and the intermediate plate, and wherein the intermediate plate is made having a mutual spacing of the nozzle fitting mouthpieces from one another that corresponds to an operating temperature spacing of the exit nozzles (15, 16), and the melt manifold block is made having a spacing of the exit nozzles that corresponds to a room temperature spacing (m) that is smaller in comparison to the operating temperature spacing. - a diecasting mold having a fixed mold half and a movable mold half, and - a hot runner feed system comprising a melt manifold and feed block construction having an entry-side feed inflow opening, at least one first and one second exit-side feed outflow opening (2, 3) which open into a mold separation plane between the fixed and the movable mold half (4, 20), and a casting runner-duct structure that extends so as to branch out from the feed inflow opening to the feed outflow openings (2, 3), characterized in that - the melt manifold and feed block construction at least in an exit-side block region that includes the two feed outflow openings (2, 3) is made so as to be shortened in a transverse direction parallel with the mold separation plane in relation to a predefined nominal operating extent by an expansion dimension (Δm), and - the melt manifold and feed block construction comprises a melt manifold block having a first exit nozzle that is assigned to the first feed outflow opening, and a second exit nozzle that is assigned to the second feed outflow opening, and an intermediate plate having a first and a second nozzle fitting mouthpiece (18, 19) for fitting the exit nozzles in a centering manner, wherein the first feed outflow opening continues through the first nozzle fitting mouthpiece and the intermediate plate, and the second feed outflow opening continues through the second nozzle fitting mouthpiece and the intermediate plate, and wherein the intermediate plate is made having a mutual spacing of the nozzle fitting mouthpieces from one another that corresponds to an operating temperature spacing of the exit nozzles (15, 16), and the melt manifold block is made having a spacing of the exit nozzles that corresponds to a room temperature spacing (m) that is smaller in comparison to the operating temperature spacing.