Rattle Under Car Could It Be Heat Shields - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 06-25-2005, 02:11 PM
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under my car i have a rattle and dont know what it is and i was thinking could it be the heat shields or something else if you have any ideas please anything will help
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#2 (permalink) Old 06-25-2005, 02:20 PM
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Where is the rattle coming from, is it a plastic sound or a metalic sound? Coming from drivers side, passenger side or middle? Little more detail. Based on what you said, sure it could be the heatshields, or it could be anything else.
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#3 (permalink) Old 06-25-2005, 03:12 PM
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hey i had the exact same problem , the rattle was coming from the middle of the car, it was the heat shields, it had broken around the bolts, so i removed the bolt, puta large washer and put the bolt back in place, its so far solved the problem and the heat shield is in place, give it a try

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#4 (permalink) Old 06-25-2005, 06:22 PM
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cool that sounds just like my problem thanks bro
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#5 (permalink) Old 06-25-2005, 06:59 PM
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Get under the car, find the heat shield and try giving it a little wiggle, it shouldnt move but as moe19x mentioned, the area around the washers rust and eventuly rust away leaving it unsecured, hence the rattling. If you can get the bolts off (assuming this is the problem) just stick some big washers on that cover the area thats been rusted away. But also as thekid said, a few more details might help, could be a worn flange holding the exhaust up thats rattling, or it could be a knackered cat, although that sounds more like crackling.

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#6 (permalink) Old 06-26-2005, 09:33 AM
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it could also be the brake dust shields, i had that problem in the rear. look at that too

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#7 (permalink) Old 06-26-2005, 01:49 PM
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I've also had a problem where a piece of my heat shield had broken partially and was vibrating on the non-broken part. Eventually it just started scraping the ground and thats how I found out what it was, then I broke off the piece and no more sound. Granted it wasn't on my Bimmer but my old taurus, but it still could cause the rattle.
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#8 (permalink) Old 07-05-2005, 04:27 AM
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Maybe a bit too late on my reply but i had a rattle on the under side of my 318 , it was the sheid on the cat converter , best thing for it......angle grinder , take it off !
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#9 (permalink) Old 07-05-2005, 12:33 PM
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its probably the heat sheilds around your cat converters...I have that problem but havent found a solution for it just yet. Its very obvious when you are driving at low speeds with the windows down.

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#10 (permalink) Old 07-05-2005, 01:07 PM
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Could also try going under the car and tap stuff with a rubber mallet to see if anything vibrates a lot.



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#11 (permalink) Old 07-05-2005, 02:07 PM
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found that it was a piece or metal that was sitting on the top of the muffler that the shop put on and it came loose
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