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Old 09-30-2011, 02:07 PM   #6
Frodo
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Join Date: Mar 2007
Location: Ohio
Posts: 1,999
Quote:
Originally Posted by JFP in PA View Post
I know you say it goes away with the belt off, but check your heat shields on the exhaust system, we see a lot of cars with strange rattling noise on acceleration that were traced to loose shields, and once secured, the sounds vanish.
Doesn't sound like loose heat shield sounds that I've heard before, but that doesn't mean it couldn't be that. I suppose the reduced stress on the engine when the belt is removed might give rise to less torque-related movement, less vibration overall, and might account for the sound disappearing? I'll look for a possible culprit in that area, though it could be a challenge since, as I mentioned, it doesn't seem to happen except when the car is moving. (Might be tough to replicate on jack stands!)

If I see anything that has any possibility of being the problem, I'll wedge something in there, take it for a short spin and see if the noise is gone. Thanks!
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