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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 08-29-2005, 02:12 PM   #1 (permalink)
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Today I removed the two heat sheilds over the cat converters on my 98 328i today. They were rattling and I couldnt stand the noise any longer it was driving me nuts, especially when the windows were down while going over any bumps.

I hope that this wont cause any problems with them not being there anymore...heat issues, or anything else I might not be considering.

Has anyone else done this, or have any input.
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Old 08-29-2005, 10:19 PM   #2 (permalink)
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Originally posted by 98three28i@Aug 29 2005, 03:12 PM
Today I removed the two heat sheilds over the cat converters on my 98 328i today. They were rattling and I couldnt stand the noise any longer it was driving me nuts, especially when the windows were down while going over any bumps.

I hope that this wont cause any problems with them not being there anymore...heat issues, or anything else I might not be considering.

Has anyone else done this, or have any input.
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Its generally not a problem unless you get some road debris up under there and it catches fire. There's a insolation ring at the front and rear of the heat shield and they break up and fall away, leaving the heat shield lose and rattling. I took mine to Midas and had them tac weld the shield back down a few months ago, so far so good. On another car that did it I stuffed some JB Weld in there and it held fine, no rattles. But keep a fire extinguisher in your car just in case.




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Old 08-30-2005, 07:53 AM   #3 (permalink)
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You sure it was you HeatShields...and not your rearshock mounts...
I had the same rattle as you...but it was not the heat shield as I'd thought...

Also it will be a problem...because it's there for a reason. right?
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Old 08-30-2005, 08:20 AM   #4 (permalink)
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I've replaced my rear shock mounts recently, but when they go bad I'd describe it as more of a clunking than a rattling. So depending on the noise it might not be that. Of course I couldn't get an objective analysis on the noise until I took all the debris from my trunk. It goes in all organized, and somehow always comes out all beat up .
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Old 08-30-2005, 10:21 AM   #5 (permalink)
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I hate that. I destroyed a perfectly good CD-changer because of a large heavy flying object in the trunk when I slid a corner. Oops. That was kind of an expensive corner.
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Old 08-31-2005, 12:02 AM   #6 (permalink)
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It was definitely the heat shields, I've confirmed that from driving since. I've already replaced the RSM's

no more noises = happy bimmer
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Old 08-31-2005, 12:39 AM   #7 (permalink)
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Above the entire under car exhaust is like a heat shield padding so there shouldn't be any problem, unless like Hamfisted says if something catches fire.
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