vacuum cleaner under the engine?
I've started to get this noise under the hood, that sounds like a vacuum cleaner when ever i accelerate, I had the mechanic check it out, he says it's the water pump, and that it needed to be replaced. I don't believe he was correct, My engine isn't overheating, and there are no leaks. Someone else said that they think it's my alternator. It only makes the noise when i accelerate.