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#1
04-11-2021, 08:02 AM
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what is this screeching sound?
__________________
2012 X5 30d 
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#2
04-11-2021, 11:10 AM
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Bad idler bearing? You have a stethoscope? They are invaluable for pinpointing noises like these.
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#3
04-11-2021, 01:04 PM
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Or a dowel rod (sometimes better) as they transmit the noise from contact point without adding sounds from farther away.
Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
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#4
04-11-2021, 01:48 PM
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It’s a very strange sound because it doesn’t sound periodic so therefore it does not sound like it’s coming from the engine directly. But it sounds like to me is water dripping on something hot and turning to steam. Leak in your windshield reservoir dripping on exhaust possibly?
You can use an app like FFT to determine the source of the sound by moving your phone around and observing the waveform including amplitude and frequency Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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