[Brian R.]

I don't get some of your description. You cranked it with the plugs out and water came out of the plug holes. Then you let it sit and the engine won't turn at all? Really bad problems like bent rods don't behave like that. Did you remove all the plugs or just the easy three?

It is hard to understand how the motor can turn with the starter one day and the next, not turn at all - even with a wrench on the crank pulley bolt.

See if there are any stored codes in the ECM.

Make sure there is no water in the cylinders or crankcase. Get any out of the cylinders with suction, and change the oil - for sure you have water in your oil. Make sure there is no water left in the intake system, including the air filter box.

Was the new battery for sure charged? Old one and new one may both be discharged. New one may need to be charged first before you can get the engine to turn over. There may be a water-caused short in the charging system that drains them or maybe the new battery was not well-charged in the first place.

It is also possible you broke the timing belt and it is jamming the crank pulley. Pull the upper timing cover and see if the belt is intact.

If there is no visible problem, it is possible that the rings froze to the cylinder walls overnight (strange). Try shooting a little pb blaster/liquid wrench (not WD40) into each of the cylinders through the plug holes and see if that helps.