the following description of the preferred embodiment ( s ) is merely exemplary in nature and is in no way intended to limit the invention , its application , or uses . the present invention is generally related to a cooling system for an engine . in this regard , the cooling system will be described in the context of an internal combustion engine with eight cylinders in a ninety degree formation . however , it is to be understood that the principles embodied herein are equally applicable to other types of engines and engines in different formations as well . [ 0017 ] fig1 is a three - dimensional perspective view of an engine 10 including a coolant entry section 12 in fluid communication with a coolant distribution system 14 which is also in fluid communication with a coolant exit system 16 . the distribution system 14 and coolant exit system 16 will be discussed with reference to only one side of the engine 10 . it is to be understood that the distribution system 14 and exit system 16 are identical on either side of the engine . referring to fig2 the coolant entry section 12 includes an entry port 18 in fluid communication with a pump 20 , as shown in the art . the pump 20 is positioned on the front of the engine 10 . the pump 20 is in fluid communication with two feeder lines , 22 and 24 . feeder line 22 is located on the right side of the engine 10 , and feeder line 24 is on the left side of the block . both feeder lines 22 and 24 are in fluid communication with the distribution system 14 . the distribution system 14 has an inlet manifold 26 in fluid communication with the entry section 12 . the inlet manifold 26 runs along the side of the engine 10 and defines a manifold chamber 26 a that decreases in area from front to back as best shown in fig3 . the inlet manifold 26 in fig3 is encircled with dashed lines and is also detailed in fig7 . now referring to fig4 the distribution system 14 further includes a coolant network 28 and a cylinder head 38 . this coolant network 28 is in fluid communication with the cylinder head 38 . the coolant network 28 includes multiple coolant passages 30 , best shown in fig4 and 7 , which are in fluid communication with the inlet manifold 26 . referring to fig4 and 7 , these coolant passages 30 are also in fluid communication with a respective cylinder coolant jacket 32 . the individual cylinder coolant jackets 32 combine to make up a coolant chamber 34 . this coolant chamber 34 surrounds the cylinders 36 . the cylinders 36 in the engine 10 each share a wall , commonly known as a siamese configuration , but they could also be in a standard spaced apart pattern , such that the coolant jackets 32 fully encircle the individual cylinders . referring to fig5 a side view of the cylinder head 38 of the distribution system 14 is shown . the cylinder head 38 is in fluid communication with the coolant network 28 and includes bolt holes 40 which receive bolts ( not shown ) which also engage the bolt holes in the engine 10 . specifically , multiple coolant passages ( not shown ) in the cylinder head area 38 are in fluid communication with the coolant chamber 34 . these coolant passages are also in fluid communication with exit ports 42 , 44 and 46 in the side of the cylinder head 38 . the exit ports 42 , 44 , and 46 are aligned in parallel , with central exit port 44 sized such that it is approximately twice the size of exit ports 42 and 46 . this ensures uniform coolant flow . the exit ports 42 , 44 and 46 are in further fluid communication with the coolant exit system 16 . with reference to fig6 coolant exit system 16 includes cylinder outlet passages 48 in fluid communication with distribution system 14 . specifically , the cylinder outlet passages 48 are in fluid communication with exit ports 42 , 44 and 46 . these cylinder outlet passages are also fluidly coupled to an outlet manifold 50 . the outlet manifold 50 is in fluid communication with an outlet 52 . outlet 52 is in fluid communication with a radiator ( not shown ). the manifold 50 includes bolt holes 51 which receive bolts ( not shown ) which also engage the bolt holes 40 in the cylinder head 38 . [ 0023 ] fig7 is a cross - section of the engine 10 , taken through the third and fourth cylinders 36 . the cylinders 36 have corresponding cylinder coolant jackets 32 . the coolant passages 30 fluidly connect the cylinder coolant jackets 32 to the inlet manifold 26 . specifically , the coolant passages 30 fluidly connect the cylinder coolant jackets 32 to the coolant flow area 26 a of the inlet manifold 26 . in this cross section , the inlet manifold coolant flow area 26 a has been slightly reduced to ensure proper flow distribution at the rear of the inlet manifold 26 . during operation of the engine 10 , coolant enters the pump 20 through an entry port 18 . the pump then forces the coolant into two feeder lines 22 and 24 . following feeder line 24 only , with the understanding that the process is identical for both feeder line 22 and 24 , feeder line 24 sends coolant into the inlet manifold 26 . from inlet manifold 26 , coolant is carried by coolant passages 30 into the respective cylinder coolant jackets 32 . the coolant flows from the coolant jackets 32 and around the coolant chamber 34 as illustrated by the arrows a in fig4 . the coolant from the coolant chamber 34 is then forced up into the cylinder head 38 through multiple coolant passages . from the cylinder head 38 , coolant flows out exit ports 42 , 44 and 46 into the respective outlet passages 48 . from the outlet passages 48 , coolant flows into the outlet manifold 50 where it is forced to exit the system through outlet 52 into the radiator . the cooling system of the present invention greatly reduces temperature variation between cylinders . test results have shown variation as low as 12 degrees across the entire engine , hence improving engine performance and durability by reducing the occurrence of hot piston scuffing and detonation as well as improved ring sealing and reduced piston ring tension . in addition , this system allows flow to be precisely targeted to each area of the engine through manipulation of the diameter of the coolant passages . in this embodiment , the inlet manifold 26 is cast in the engine 10 , and thus reduces external packaging .