Whenever i start my car cold and start driving there is a strange whining/moaning sound, almost like a ghost coming from the engine, it sounds like its coming from the right side and it fades in and out depending on rpms. After the car has warmed up for about a minute the noise stops and wont come back till the next time i start it up in the morning. I asked the dealer and they looked at it but couldnt find anything wrong and told me not to worry about it. Could this be my waterpump bearings going bad? with just under 100,000 miles on it i know this could be the case.