Abstract: In an internal combustion engine for a motor vehicle, having a cylinder housing in the form of a light metal alloy casting with working cylinder sections including cylinder liners which consist of rough-surface iron castings and which are integrally cast into the working cylinder sections with housing webs formed between adjacent liners, the cylinder housing has cooling channels formed in the housing webs between adjacent cylinder liners and the working cylinder sections of the cylinder housing for directly cooling the cylinder liners.

Abstract: The invention proceeds from an on-board diagnosis unit for a motor vehicle for detecting a released mechanical connection between at least two fluidic lines (10, 11), having at least one first contact element (12, 13, 14) and at least one second contact element (15) which is spaced apart axially, of which contact elements (12, 13, 14, 15) at least one is provided for being deformed at least substantially elastically for making contact with at least one connecting point (16, 17, 18) of the mechanical connection. It is proposed that the on-board diagnosis unit has at least one third contact element (12, 13, 14) which is arranged spaced apart axially from the second contact element (15).

Abstract: In an internal combustion engine comprising an engine block consisting of a crankcase, at least one cylinder sleeve extending from the crankcase and a coolant jacket disposed around the cylinder sleeve or sleeves and a cylinder head mounted on the engine block, the coolant jacket is a separate component consisting of a material lighter than the normally used cast iron jacket and is firmly engaged between the crankcase and the cylinder head which is mounted onto the cylinder sleeve or sleeves.