Engine noise please help

i have a lincoln ls v8 that is making weird noises, i have replaced both secondary chain tensioners and, the noise is still there even if i remove the drive belt . i have posted it on youtube please let me know anything that can help

http://www.youtube.com/watch?v=LwMxBc1aDzk (http://www.youtube.com/watch?v=LwMxBc1aDzk)

please help
(http://www.youtube.com/watch?v=LwMxBc1aDzk)