Patent ID: 7958860

Claim:
A crankcase of an internal combustion engine, with at least one main lubricant channel for supplying the internal combustion engine with lubricant and with at least one lubricant return channel ( 10 ) for return flow of excess lubricant to a reservoir ( 11 ), wherein the lubricant return channel ( 10 ) includes a peg-shaped widening ( 12 ), which is formed by a formation of a bearing support of an oil channel core ( 18 ), wherein the peg-shaped widening ( 12 ) is provided in an area ( 13 ) intended for later surface treatment, wherein the peg-shaped widening ( 12 ) is provided in the area ( 13 ) of a lateral or side insertion surface ( 14 ) for a main bearing lid of the crankcase ( 15 ), and wherein said crankcase is produced by a method comprising: forming the lubricant return channel ( 10 ) in a cast part by a removable lubricant channel core ( 18 ), wherein the lubricant channel core ( 18 ) for the lubricant return flow channel ( 10 ) is formed with the peg-shaped widening ( 12 ) provided in an area ( 13 ) intended for later surface treatment, the area ( 13 ) forming a lateral or side insertion surface ( 14 ) for a main bearing lid for a main bearing ( 21 ) of a crankcase ( 15 ), wherein the peg-shaped widening ( 12 ) supports the oil channel core ( 18 ) during coating.