small exhaust leak

1MOREMOD · 08-12-2011, 04:34 PM

installed a challenge sport x pipe couple weeks ago and sounds good but a little muddy like i have a leak or something vibrating under there and touching the heat shield. got the car up in the air today to look and formed the heat shield so not any touching parts just in case. i have a leak at the fitting between the resonators and the rear axle section. i can put my hand by it and feel it on both sides right where the clamp comes closed and there is a little gap. the stock axle back has a little crimp in it at these points maybe from overtightening from the factory. any idea how to seal this leak. just tried to use some high temp sealant in the area its leaking and am letting it set up. dont really want to weld these together but want it to sound correct.

mkPOTO · 10-11-2012, 06:24 PM

I'm having the same issue, have you resolved it?

THE TECH · 10-12-2012, 09:55 AM

Pic?

Jon@Bimmersport Automotive · 10-12-2012, 10:59 AM

Try pushing the muffler tips in to put some pressure making the fit tighter, as someone is pushing the rear muffler into the midsection tighten the clamps fully and recheck for leaks.

M3PO · 10-12-2012, 05:54 PM

I've noticed that the clamps bend inward with use so they don't apply much pressure to the joint. Taking them off and bending the tabs where the bolt goes through will allow you to get it a bit tighter. Otherwise, some high temp silicone is probably your best bet.

m3an · 10-12-2012, 06:19 PM

You really need 2 people here are creative moves

.

You need to push the pipes into the socket fittiing while tightening on the clamp to maintain a seal or they will always leak a little bit (not bad but noticeable).

If all else fails use exhaust/rtv silicone

08-12-2011, 04:34 PM	#1
1MOREMOD - 11817 Rep 23,187 Posts Drives: Race car-> Join Date: Mar 2009 Location: check your mirrors iTrader: (5)	small exhaust leak installed a challenge sport x pipe couple weeks ago and sounds good but a little muddy like i have a leak or something vibrating under there and touching the heat shield. got the car up in the air today to look and formed the heat shield so not any touching parts just in case. i have a leak at the fitting between the resonators and the rear axle section. i can put my hand by it and feel it on both sides right where the clamp comes closed and there is a little gap. the stock axle back has a little crimp in it at these points maybe from overtightening from the factory. any idea how to seal this leak. just tried to use some high temp sealant in the area its leaking and am letting it set up. dont really want to weld these together but want it to sound correct. __________________ 02 Tiag e46 M3\|6MT\|GC plates\|MCS c.o.\|GC bars\|GC race control arms\|GC bushings\|BW eng. & tran. mounts\|subframe kit\|BW race shifter\|BW Jaffster\|Euro header\|BW exhaust\|K&N c.a.i.\|Epic race tune\|Rouge pulleys\|Seibon CF hood\|CSL bumper\|apr gt 250 & splitter\|ST-40\|XR-2\|SS lines\|half cage\|Recaro profi\|Profi 2 harness\|BMWpedals\|BW studs\|
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10-11-2012, 06:24 PM	#2
mkPOTO Mr. Nice Says Hello 635 Rep 16,662 Posts Drives: BMW M3 \| X5 xdrive 35i MSport Join Date: Dec 2008 Location: USA iTrader: (25) Garage List 2002 Lexus GS300 [0.00] 2008 BMW E92 M3 [5.58]	I'm having the same issue, have you resolved it?
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10-12-2012, 09:55 AM	#3
THE TECH BimmerPost Supporting Vendor 307 Rep 13,093 Posts Drives: BPMsport 2012 E92 M3 Join Date: Jun 2011 Location: Kansas iTrader: (45) Garage List 2013 Nissan GTR [0.00] 2019 Sierra Denali ... [0.00] 1999 Nissan Silvia [0.00] 1999 Nissan Skyline ... [0.00] 1998 Toyota Supra [0.00]	Pic?
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10-12-2012, 10:59 AM	#4
Jon@Bimmersport Automotive Banned 43 Rep 342 Posts Drives: E90 M3 Active Supercharged Join Date: Jun 2008 Location: Mississauga, On Canada iTrader: (0) Garage List 2003.5 BMW M3 [10.00]	Try pushing the muffler tips in to put some pressure making the fit tighter, as someone is pushing the rear muffler into the midsection tighten the clamps fully and recheck for leaks.
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10-12-2012, 05:54 PM	#5
M3PO Colonel 83 Rep 2,792 Posts Drives: '08 IB E92 Join Date: Sep 2011 Location: OC iTrader: (7)	I've noticed that the clamps bend inward with use so they don't apply much pressure to the joint. Taking them off and bending the tabs where the bolt goes through will allow you to get it a bit tighter. Otherwise, some high temp silicone is probably your best bet. __________________ 2008 IB E92 M3\| BBS \| KW \| Arkym \| Platte Forme A.G. \| Active Autowerke \| K&N \| Fabspeed \| Dinan \| Evolve-R
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10-12-2012, 06:19 PM	#6
m3an Banned 39 Rep 1,590 Posts Drives: M3 Join Date: Oct 2010 Location: South Florida iTrader: (2)	You really need 2 people here are creative moves . You need to push the pipes into the socket fittiing while tightening on the clamp to maintain a seal or they will always leak a little bit (not bad but noticeable). If all else fails use exhaust/rtv silicone
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