https://dl.dropboxusercontent.com/u/...2021.24.59.mp4
Noise starts out after the car warms up, after driving 15 to 20 minutes, or just letting the engine run while in Park.
It sounds like it's coming from everywhere, but here's what we've done to rule out various things:
-Belt has been replaced.
-Water pump has been replaced. (Twice, just for good measure.)
-Tensioner assembly has been replaced.
-Power steering pump has been replaced.
(Note: Those items were original and needed replacing, even though they were not the cause of the noise.)
-Harmonic Balancer has been replaced.
-Torque converter has been replaced.
-Transmission filter and fluid has been changed. Nothing unusual was found in the pan.
I thought it must be a spun bearing, so we dropped the oil pan and the bottom of the engine looked pristine, no metal fragments anywhere. Oil was clean. My mechanic obviously can't figure out what it is, so I'm turning to the experts here. Any ideas of what this could be, or what my next troubleshooting step should be to isolate this?
Finally, it does this WITH THE BELT OFF, so it's not the AC compressor or the alternator.
When it starts making this noise, it does it gradually, sounding something like a chicken clucking:
https://dl.dropboxusercontent.com/u/...2021.16.04.mp4
(some guy asks me about his flat tire while I'm filming, and I have to tell him I don't work there.)
Other than this noise, the engine runs perfectly, and the transmission shifts perfectly. This is super frustrating and I've spent a truckload of money on it without finding the actual cause.
