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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 12-24-2012, 02:28 PM   #1
illestminimike
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Maybe Exhaust Rattle?

When I start my car sometimes, usually when it's cold, I hear a slight rattle coming from under the car. It only last 5 seconds then doesn't come back until the next cold start. I really don't know what to look at. Any ideas?
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Old 12-24-2012, 02:33 PM   #2
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Cat?
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Old 12-24-2012, 02:34 PM   #3
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I'm guessing its coming from there. I can't really tell where cus it doesn't last very long.
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Old 12-24-2012, 02:42 PM   #4
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Might be a heat shield 2. Mine was doing the same thing, and it was the shield on the passenger side. Above the headers.
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Old 12-24-2012, 02:55 PM   #5
illestminimike
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Alright I'll look there. It's really slight and won't last longer than 5 seconds on a cold start.
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Old 01-02-2013, 07:41 PM   #6
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Good luck, chasing rattles and squeaks around the S54 is a pita. Hope you pin it down.
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Old 01-03-2013, 08:11 AM   #7
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most likely heat shields on or around the cat. happened to me as well, quick hose clamp does the trick, but its a mother to get to. good luck
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Old 01-04-2013, 01:04 AM   #8
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Quick hose clamp does the trick
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Old 01-05-2013, 02:34 AM   #9
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I'm guessing its coming from there. I can't really tell where cus it doesn't last very long.
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