Grinding Noise - Video Attached

Witzy0070 · Apr 7, 2015

Today I was driving and I noticed a grinding sound. I also noticed my stock voltmeter was slightly bouncing(not sure if alternator is failing or something else is creating drag), however my digital voltmeter read pretty consistently between 14.0 - 14.5. I can't tell if it's my alternator or supercharger. I used a stethoscope and it didn't help. Car is holding boost correctly. Drives fine.

[video]http://vid1214.photobucket.com/albums/cc483/stillboredb/Grind_zpsacmxzqzk.mp4[/video]

Orange 94 · Apr 7, 2015

Is it actually a grinding sound in person? Sounds like a rattle on video.

Have you tried the old screw driver trick? Place the screw driver on surfaces and put your ear against it.sometimes helps to pinpoint sound?

Witzy0070 · Apr 7, 2015

It is hard to describe the sound. It is intermittent but happens pretty consistently at idle. I used a stethascope on the supercharger and alternator, I couldn't differentiate them acoustically.

But yes, it's the "rattle" near 7 seconds in.