I am getting water into the cylinders both sides so that the spark plugs foul when engine cold and takes a long time cranking before starting. Pull the plugs and I can see water vapor on cranking. Did a block test hot and cold - no combustion gases in coolant, checked the tester at tail pipe to make sure it turned yellow. I could see air bubbles in the tester but they were not combustion gas.
Question - can the intake manifold leak cause the leaking into the combustion chamber and the non-combusted air leak into the coolant which I saw streaming as air bubbles at times with the leak tester. The compression is running 140 to 170 in the cylinders cold.

 

More likely what you are seeing is vaporized fuel...... is it possibly running to rich? No way for intake leak to get into combustion chamber, it would be in the oil first.