Went out and looked at the egr not and it's cross threaded. It's going on at a pretty good angle. I guess the dealer didn't bother to fix it or couldn't. I don't have the tools I need with me right now to get at it. I'd like to take the whole tube off to make sure I get it on right and look at the damage but it looks like it's damn near impossible to get to the bolts behind the motor. I started it and it ran perfectly for 10 minutes. I revved it slowly and the knock comes in around 2000 rpms. I still can't imagine that the egr not could cause this noise. It definitely sounds like knock from the front bottom of the motor. I hope the nut fixes it. I'll keep ya posted.

Thanks Guys,

Mrcln1