Sorry I should have given a better update. We were recently told by a mechanic that the water was coming in through the air intake hose and that was the problem. When I originally called Winnebago Service Administrators, they told us it was a problem with the turbo resonator and to have it changed. The latest is that the water comes in through the hood, (area under the windshield) so a bigger rubber gasket has to be put in to replace the thinner one and the area was caulked. According to Winnebago, this is being done to all new Reyos coming off the line and there may be other tweaking done along the way. This should keep the water out and no more shorting the computer or other valves etc. As I mentioned, the Itasca dealership we went to this week told us they have sold 5, and there have been no engine issue they know of. A Winnebago rep. told us that he knows of 6 units who have the same problem. My issue is the problems we had with our faulty unit, and Winnebago refusing to take it back and give us our money back. If this was a car the lemon law would have covered this. Not all states cover motor homes under the lemon law, so you have to hire a lawyer and go to court, another nightmare. I have dealt with several people at Winnebago. Ask if your unit is one of the new units with the modification to keep the water out. Hopefully this will fix the problem for us, but I still have a bitter feeling about the whole incident. We have yet to enjoy it, having spent so much time getting it repaired. Now, another two months for the ordering of parts and repairs and who pays for what is not how I expected to be spending winter. Winnebago did finally agree to reimburse us for car rental and lodging related to having repair work done on our long way home. As for the engine, it would appear that Mercedes was right, and the fault was not the engine they built, but the coach put on it. Time will tell.