Grinding Noise - Video Attached

Discussion in 'General Tech' started by Witzy0070, Apr 7, 2015.

  1. Witzy0070

    Witzy0070 Active Member

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    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]
     
  2. Orange 94

    Orange 94 Moderator Staff SN95 Supporter

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    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?
     
  3. Witzy0070

    Witzy0070 Active Member

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    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.
     
  4. Witzy0070

    Witzy0070 Active Member

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    Just dropped it off at my mechanic. Will update.
     
  5. evilcw311

    evilcw311 Most Evil Mod! Staff Member Staff

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    Hard to hear anything over the supercharger!!! Lol


    This message courtesy of crapatalk!
     
  6. Witzy0070

    Witzy0070 Active Member

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    No kidding, but it's there! Damn centris.
     
  7. Witzy0070

    Witzy0070 Active Member

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    Update: Mechanic diagnosed as belt tensioner is failing. We'll see.