SOLVED: Chasing strange whine
This is sort of a repost which I had initially suspected to be associated with VVIS, a strange whine or drone noise coming from the engine bay at idle (even the slightest increase in RPM kills it) when the engine has been fully warmed up (sound clip is posted below).
The mechanic who recently worked on the car is very knowledgeable about the NSX and did a great job replacing the WP/TB and many other components, but he couldn't conclusively identify the provenance of this rather novel noise, other than saying it seems to be coming from the intake area or within the valley of the motor, characterized as a kind of turbulence harmonic or resonance. Anyone encountered this?
I inspected VVIS flaps, all are correctly screwed in and the flaps close as they should upon startup.
Alternator and a/c tensioner bearings were inspected and were deemed quiet, I'm also assuming a bearing noise would be heard at higher revs as well as idle, but I could be wrong. The noise doesn't sound metal/metal to my ears.
Any ideas appreciated, here is the sound clip:
https://youtu.be/I3YUQFXKCbU
This is sort of a repost which I had initially suspected to be associated with VVIS, a strange whine or drone noise coming from the engine bay at idle (even the slightest increase in RPM kills it) when the engine has been fully warmed up (sound clip is posted below).
The mechanic who recently worked on the car is very knowledgeable about the NSX and did a great job replacing the WP/TB and many other components, but he couldn't conclusively identify the provenance of this rather novel noise, other than saying it seems to be coming from the intake area or within the valley of the motor, characterized as a kind of turbulence harmonic or resonance. Anyone encountered this?
I inspected VVIS flaps, all are correctly screwed in and the flaps close as they should upon startup.
Alternator and a/c tensioner bearings were inspected and were deemed quiet, I'm also assuming a bearing noise would be heard at higher revs as well as idle, but I could be wrong. The noise doesn't sound metal/metal to my ears.
Any ideas appreciated, here is the sound clip:
https://youtu.be/I3YUQFXKCbU
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