Where the noise is coming from? Replaced belt, belt tensioner, idler roller, water pump, pulleys. Still have a noise around belt. Usually when car is parked on incline.

 

Does it go away if you remove the dipstick?

 

Planning to replace PCV breather in a week. I will let you know if it helped.
Somehow sounds more mechanical to me, then breather

 

Easy to tell before replacing the PCV breather box. Just pull the dipstick. If it stops, replacing the box will fix it.

 

Thank you

 

I have a noise that I cannot pin down. Seems like it’s coming from the AC or near the AC.
What’s been done so far: new serpentine belt, tensioner pulley and idler pulleys as well as the alternator pulley on the serpentine side, had the special tool for this. New PCV valve. All this was pretty straightforward and the pulley bearings and tensioner bearings felt pretty rough so this all needed doing.
Odd behavior is that the sound goes away at idle -stops around 850-900RPM but reoccurs as you increase rpm’s over 1000.
Happens with and without the AC on. I’ve searched forums but to no avail. Anyone experience this?
Occurs when parked or in motion. Sound does follow RPMs over 1000rpm - increase with rpm.
AC works well and we are in AZ.