Abstract: A heat exchanger has oil core plates and coolant core plates disposed in alternating, stacked relationship. Flow passages are provided between adjacent plates, so that the oil flow passages alternate with the coolant flow passages, and the oil can flow from an oil inlet opening of each oil plate, and through the oil flow passage to an oil outlet opening, and coolant can flow from a coolant inlet opening of each coolant plate through the coolant flow passage to a coolant outlet opening. The oil inlet openings are adjacent one end of the plates, and the oil outlet openings are spaced from the oil inlet openings, with a passageway for flow of the oil between upstanding bosses of the coolant plates on opposed sides of each oil plate and extending from a gap in an upstanding flange of the oil plate to the oil outlet opening.

Abstract: A heat exchanger has a plurality of oil core plates, and a plurality of coolant core plates, with each plate having an oil inlet opening adjacent one end of the plate, an oil outlet opening spaced from the oil inlet opening towards an opposed end of the plate, a coolant inlet opening, and a coolant outlet opening, and with the coolant inlet and outlet openings being adjacent the opposed end of the plate. Each oil core plate has an inwardly inclined, upstanding flange surrounding the oil inlet opening in the plate except for a portion thereof adjacent the one end of the plate at which a gap is provided in the flange. The oil outlet opening in the plate extends to adjacent the opposed end of the plate, and a further inwardly inclined, upstanding flange surrounds the oil outlet opening in the plate except adjacent the opposed end of the plate at which a further gap or gaps are provided in the further flange.