The water that got into your engine could have caused a number of things and once the techs at the shop start taking it apart you could be talking about another motor! I had a maxima with the three liter v6 and the same thing your asking about happened to me and i know it was a nightmare that I would not wish on my worst enemy, my piston rings collapsed and my mass air flow sensor went and the list goes on and on. So all im saying is becareful who you take it to and get a number of different opinions. :thumbup: