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Old 10-03-2017, 09:24 AM   #3
RandallNeighbour
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Join Date: Jul 2004
Location: Houston, Texas
Posts: 7,243
You know, it could very well be an aluminum heat shield and it's vibrating around that RPM range. I had a couple of elusive buzzing sounds and rattles and I couldn't figure out where they were coming from since it didn't sound like aluminum heat shield rattling and buzzing, but that's what it was. 5 minutes under the car with a hammer and I was much happier.
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