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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 09-19-2012, 08:42 PM   #1
Cayne23
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Join Date: Sep 2012
Location: forest hill, md
Posts: 555
My Ride: 2002 m3 convertible
rattle sound under car

I think im hearing a loose heat shield under my car when i carry out my gears. Starts at about 4000rpms. Is this common?
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Old 09-20-2012, 01:48 AM   #2
TArse
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Join Date: Nov 2010
Location: Columbus, GA
Posts: 668
My Ride: 03 330xi, 87 325is
I got the a rattle (i have full exhaust ) in the lower rpm range when the exhaust note is at its lowest.
I think it's a heat shield but I can't find it.
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Old 09-20-2012, 09:51 AM   #3
DSilk56
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Location: Miami, Florida
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My Ride: M-3 Convertible
It might be the exhaust vibrating against the shield (or something else). Check the exhaust mounts, and also check the engine mounts. As they wear, the engine drops slightly. Since the engine moves on its mounts when under load, that motion might be enough to result in contact between the exhaust and the shield.
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Old 09-20-2012, 10:26 PM   #4
BWOODM3
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Join Date: Dec 2010
Location: Brentwood, CA
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My Ride: 2002 M3 convertible
Yeah, mine does this when im coasting or accelerating at a lot speed. Never found the problem.
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