<p>This invention relates to a method of cooling an internal combustion engine, to an internal combustion engine assembly including a cooling system and to an internal combustion engine body incorporating passageways for coolant. <??>The invention provides an internal combustion engine having a primary and secondary flow of coolant together with a method of cooling such and engine. The secondary flow of coolant is injected into the primary flow of coolant in dependence upon a variable provided by a sensor, which provides an indication of the temperature of the engine body in the region where the secondary flow of coolant mixes with the primary flow of coolant. <IMAGE></p>
