In the video you can heart a sort of wobble/warble thats very rhytmic. In person its very quiet, and only heard at idle. You can barely if even hear it when the hood is closed, and very very slightly hear it in the cabin at idle if you listen to it.
The noise started after acura did my water pump, tensioner, and timing belt. I brought it back to them after due to the noise, and they replaced two pulleys and put in the idler shim due to my car being under spec. The noise is still there now a month later, no louder, sometimes quieter, but there at idle.
I have read through a similar thread about this from 2014, unfortunately the video links didnt work, but it was about the same noise after the TB belt service. It seemed some people said this was regular engine noise at this point, and others had it and experienced it after the Tb service.
Any help or input on this noise would be appreciated before I take it back to Acura again. If it really is regular noise, Ill leave it and just move on.
It also is not from the Ps pump, or anything on the serp belt as the noise continues with the serp belt off.
i appreciate the help!
EDIT: Just also read in that thread it was due to shaft play in the water pump when it reached a certain temp to cause that noise? Does anyone know if thats true?

 

Take it back to them to have them diagnose? Sounds like a bad tensioner to me..

 

i def dont think its tensioner. As tensioner is more a constant chip/tick, and this is much quieter. I had a friend look at the car, and of course we didnt take everything apart but he also thinks its the water pump?
i just edited my post but in the other thread I read apparently when the water pump reaches a certain temp there is shaft play causing that noise. Replacing it apparently fixes it, but I wanted to know if anyone else can confirm that.

 

I assume the dealer used OEM parts. If not, could be water pump (Lots of fake timing belt kits even from Amazon as seller. My waterpump had many cosmetic pits in the alloy that were not on my original part. Everything else looked OEM so I finally decided to keep it.)

One poster in the timing belt thread had what could be similar issue. In his case, he fixed it by retightening the harmonic balancer. Maybe that will help.

Timing belt thread

https://acurazine.com/forums/third-g...ics%2A-784622/

 

Lbeyy,

Ignore yellow highlighting in the attached images in my last post. The highlighting was made for another project.

 

Sounded like a tensioner to me too, but hope it's nothing major

 

It is the hydraulic tensioner not putting enough tension on the tensioner pulley, not the tensioner pulley itself, if Acura performed a "cheap" timing belt job and did not replace that. This "warbling sound" issue is well documented on odyclub.com , caused by tensioner not putting enough tension on the tensioner pulley and it is bouncing left and right. A guy actually ran a video with lower timing cover removed and discovered the cause.