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| 02-16-2016, 11:37 PM | #1 |
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Second Lieutenant
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Drives: 2007 BMW Z4 3.0si; 2010 BMW X6
Join Date: Dec 2015
Location: Palm Desert, CA USA
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Intermittent rattle coming from exhaust area
Usually occurs at idle. Sounds like a metallic vibration. Could it be mounts, hangers, or the heat shields? All guesses are considered....
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2007 BMW Z4 3.0si - Hellrot
2010 BMW X6 M - Space Grey |
| 02-17-2016, 06:13 AM | #3 | |
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Drives: 2010 128i
Join Date: Feb 2010
Location: Anacortes, WA
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Quote:
I had a similar buzzing that I traced down to a loose exhaust hanger bolt, only I couldn't tighten it, since the bolt was cross-threaded. I had the car in the shop shortly afterwards for maintenance, and I mentioned my problems with the bolt, and they charged me a 1/2 hour of labor to pull and retap the bolt. Exhaust sounds perfect now. Hopefully, it's an easy fix for you, too. I was fortunate enough to be able to diagnose the exact problem before I took the car in, but I would think that many exhaust shops are experienced in tracking down and fixing these noises.
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| 02-20-2016, 10:35 PM | #4 |
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Drives: 2011 BMW 128 Coupe Msport
Join Date: Feb 2014
Location: Midland Texas
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Exhaust noise
I had a problem with a clatter in my exhaust. i have a 128 with the msport package. one side of the exhaust has a vacuum tube and a flap. the hose came loose and it would clatter like mad. was fixed under warranty and not repeated.
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| 02-22-2016, 11:52 AM | #5 |
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First Lieutenant
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Hard to diagnose over the interweb... If it occurs at idle, start the car and crawl underneath to pin it down. Could be any number of things. For more clearance, throw it on ramps / stands.
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2011 BMW 135i M Sport Space Grey - BMS JB4, VRSF 3.5" catless DP, Berk exhaust, BMS intake, ER CP, Eibach Pro-Kit, H&R spacers, black kidneys, Blacklines, LUX angel eyes
2014 BMW X5 xDrive 35d M Sport Mineral White - MPBK w/ F85 rotors & Carbotech pads, ACS Springs/Links, iND reflector deletes, iND black roundels, MP black kidneys, M50D grille inserts 2007 Suzuki GSX-R 750 - too much to list |
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| 02-22-2016, 08:31 PM | #6 |
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1Addict
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Two options to check quickly and both require getting under the car.
1: rattle and bang about under there and try to replicate the sound 2: unplug the vacuum actuator hose from the exhaust.
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| 02-22-2016, 09:37 PM | #7 |
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Lieutenant Colonel
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Check your exhaust hangers. When I installed my exhaust on my car one of my hangers, under the rear bumper was pretty loose.
Last edited by TwinTurboXI; 03-08-2016 at 08:31 AM.. |
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| 02-22-2016, 09:55 PM | #8 |
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Brigadier General
 
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Try lifting the exhaust from the tips and see if there is any play. One of the hangers is held to the car by a screw, if the screw is loose you'll hear a metal clank when you move it up and down. I had this problem and it would occur during start up, and intermittent during driving. The screw holds on the right hanger looking at the back of the car
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