Abstract: A water-cooled internal combustion engine includes a die-cast, single-piece engine block encompassing a cylinder head, a cylinder block and one part of a crankcase and coolant passages in the cylinder head and the cylinder block. The coolant passages are constituted by spaces open outwardly towards respective adjacent ends of the engine block as cast, and closures fitted in the engine block for sealing the coolant passages fluid-tight towards the outside.

Abstract: An oil cooler for an internal combustion engine comprises a housing for containing a coolant and an axially disposed center fixing tube extending through the housing. A plurality of plate-like oil chambers are disposed within the housing, each being formed by a pair of oppositely profiled cooling plates. The oil chambers are spaced apart axially along the fixing tube so that the space between the oil chambers forms cooling channels for a coolant. An oil inlet and outlet extend parallel to the fixing tube and communicate with all the oil chambers for supplying and discharigng oil directly from all the oil chambers. The oil inlet and outlet, as viewed in cross-section, lie along radii from the central axis of the oil chambers which are at an acute angle relative to one another, and a partition extends radially in the acute angle between the inlet and outlet so that oil supplied to the oil cooler is directed tangentially around the fixing tube toward the outlet.