Its a D16Y8(vtec)
Had the same noise both before an after recent top end rebuild.
I did adjust the valve lash of course. no change.

From what i can tell with a stethoscope, its coming from the rocker assembly. I say that because it's louder on the timing cover(which is bolted directly to the rockers) than anywhere on the rest of the motor(but maybe the head/block vibrates less).


During the rebuild i replaced:
accessory belts
tensioner
w. pump
T. belt
Head gasket
valve seals
other various gaskets.

I'm completely empty handed. Only a few long shot ideas. Maybe re-seating the rocker assembly, cleaning/replacing the LMAs, or checking the rod bearings.

Any suggestions?

 

https://www.d-series.org/threads/hea...ebuild.248025/

I had seen this thread before but i guess i didn't watch the video. Whatever caused this guys problem back in 2014 is it. It sounds EXACTLY the same, unlike the 100 other "d16 noise" videos I've heard.

 

It was the LMAs.