Oil cooler for automobiles

摘要: A base plate 20 is provided with an oil inflow hole 20b in the form of a through-hole. The includes area overlapping inlet communication holes 1 plates 5 within region inside annular grove 20a 20, and has planar shape extending beyond outer rim area. Thus, constituting contact end when cooler mounted to engine block, decrease resistance therein as well smooth circulation achieved.