I have a cold engine knocking sound that the dealer says is normal. I have also read many other complaints. I recorded the sound so I would have a record of it. I was hoping to get some second opinions to see if there is anything I can do about it. The dealer basically said there is nothing they could do. Any advice would be appreciated. Seems to only happen when cold and slowly goes away as engine warms. It has about 50k miles.

http://www.youtube.com/watch?v=BNUih0SzC7w