Rattling/buzzing noise under hood? - Ford Powerstroke Diesel Forum
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Old 05-20-2014, 08:24 PM
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Rattling/buzzing noise under hood?

Hey guys, I'm posting on behalf of my dad. He has an 08 6.4 with about 57,000 miles on it. Just a couple days ago it started to make a strange rattling noise under the hood. From what I can tell, it seems to be coming from the passenger side, nearer to the front. It sounds almost like a constant buzzing, and will do it even at idle. You can't hear it inside the cab so I don't know if it quits when driving. I'm thinking there is just something loose, but I'm no expert. If anybody has any idea what this might be, I'd appreciate it
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Old 05-21-2014, 04:30 AM
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Could be alternator(s), Belt tensioners and/or idler pulleys possibly. Post a vid?

Good luck.
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