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What should you do to ensure that there is no Water Leakage into the Engine Cylinder before preparing Main Engine for Sea?

The Engine should be Turned using Turning Gear with Indicator Cocks open, keeping a close eye on the Cocks for any signs of Water Discharge.Immediately prior to Starting, the Engine should be Kicked on Air.
Note:  2 Stroke Engines should be Turned at least one Revolution, where a 4 Stroke should be Turned
two Revolutions(A four stroke engine should be turned two revolutions as the cam shaft makes half a revolution compared to one turn of the engine, therefore to properly check there was no  water leakage from the cylinder head into the combustion space, then engine would have to be turned twice to ensure opening of all inlet and exhaust valves)
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