has a piston 12 reciprocatingly housed therein in a cylinder 14 of course although only one piston and cylinder are shown for the sake of convenience a system according to the present invention could be employed with engines having any number of cylinders arranged either in line or in a vee type of configuration or in other configurations either known to those skilled in the art or suggested by this disclosure air charge is allowed into cylinder 14 by intake valves 16 and exhaust is conducted from cylinder 14 by means of exhaust valve 18 intake ports 24 and exhaust ports 26 service intake valve 16 and exhaust valve 18 respectively fuel is provided to cylinder 14 by means of fuel injector 22 and energy for initiating combustion is provided by spark plug 20 injectors 22 and spark plugs 20 are mounted within central land 38 which is part of cylinder head 30 as noted above a schematic representation of flow through an engine having a cooling system according to the present invention is set forth in fig5 coolant begins flowing at radiator 32 then passes through thermostat 40 and into water pump 34 coolant passes through engine 10 first through the intake side of the cylinder heads by means of first cylinder head coolant passages 42 the reader of this specification will note that the schematic shown in fig5 is for a v type of engine having two cylinder heads it being understood that a cooling system according to the present invention could be applied to an engine having but a single bank of cylinders coolant passing through first cylinder head coolant passages 42 then passes through cylinder block coolant inlet 48 and into cylinder block 28 after passing into cylinder block 28 coolant comes into the central or.