Perhaps i have read this wrong,but when you hydraulic an engine,the chambers are full of liquid that cannot be compressed,not the crankcase.
There will be SOME water in the sump,but only cause it has proberbly bent a rod or broken rings.
Maybe something constructive like pressure testing the cooling system,leakdown test for starters would be better.
Sure am glad i build my engines myself.



dont forget the rad will draw water from the resivoir if it gets too low ( it creates a vacuum inside the radiator which then causes the radiator cap to open allowing water to enter via resivoir)
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