PileofSticks

Hey guys I need your help. No, there is not a new diesel Acura. The title was just to catch your attention. Please forgive me. I just purchased this 2006 Acura TL base model and it sounds like a diesel!! It is making a loud rattle noise. It appears to be coming from near the timing belt cover area. I have read quite a few post on here and I understand that this car is known for rattles. Regrettably I have not had any time to remove the serpentine belt and begin a diagnostic yet. For now I was hoping you guys could maybe give me a good head start.
I do not know if the timing belt has it been changed, but I am assuming it has not. Having said that, I don't know if the valves have ever been adjusted. There appears to be a loud ticking noise which I understand may be normal (valve adjustment) , but the deep sounding rattle has me concerned. Please see links below to two YouTube videos I uploaded. Thank you in advance for your feedback.

PileofSticks

My apologies, I forgot to mention the vehicle has 148K miles.

justnspace

iTrader: (1)

I couldnt tell on the 2nd video if the noise increased with revs.
but from the first video, sounds like you need a valve adjustment.

PileofSticks

Thanks for the response. I was thinking that too but since the rattle was a little deep I didn't know if it was something else maybe.

PileofSticks

Great news! The rattle noise disappeared when I removed the serpentine belt. Can anyone advise which pulleys to replace in the order of the most likely culprit? I really don't want to waste money unnecessarily. I've attached an "after" video. Thank you.

PileofSticks

I grabbed all the pulleys and noticed the one under the tensioner had some play so I will begin with that one.