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06-29-2014, 06:54 PM
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#1 |
 
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Exhaust Rattle Possibilities
Forgive me in advance, but searching wasn't as forthcoming as I'd hoped.
Had installed American Thunder (for gfx) and love it! However, am noticing two different sorts of rattle and am hoping you folks are more attuned to solutions. -Rattle at idle; likely guess on my end is one of the tips rattles inside the port opening in the back of the gfx. --Occasional single rattle over bumps; this one seems to be under the car near the passenger side. Nothing wiggles or seems loose. Not a consistent rattle and not able to easily duplicate whatever variables lead to this random rattle. Obviously I will have the installer help with this, but suggested possibilities might help the hourly costs. Experiences, friends? Thanks in advance.
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06-29-2014, 07:35 PM
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#2 |
 Drives: 2012 2SS LS3 Join Date: Jun 2012
Location: The Garage
Posts: 561
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This is a complete shot in the dark, but I had a rattle with my Flowmaster Outlaw that turned out to be the clip on the stock headers freely vibrating about, since it isn't reused with Flowmaster's mid-pipe. Mine sounded like someone jingling keys about...I solved it by hammering the clip back flush to the pipe with a rubber mallet.
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06-29-2014, 08:46 PM
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#3 |
       
Drives: 2012 45th Anniversary 2SS LS3 Join Date: Feb 2012
Location: Charlotte, NC
Posts: 2,812
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After you check tip alignment inside rear valence, I would look at the tunnel brace. Just make sure they have plenty of room over brace. If not, add some spacers or get an aftermarket tunnel brace that drops down a bit more.
If that isn't it check the heat shield in tunnel brace area. Mine had some bolts from a clamp touching the heat shield there.
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06-29-2014, 08:49 PM
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WHAT RED LIGHT?!
Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011
Location: Miami, Florida
Posts: 1,115
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First make sure that you don't have any road debris stuck up there. If not, some common issues are loose couplers or hangers, rubbing against heat shield or brace, blown cat or muffler. Good luck finding it. So nice to rid of that!
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2011 2SS/RS M6 BLACK - VARARAM NO TUNE INTAKE, MODDED AND PORTED TB, PORTED INTAKE MANIFOLD, VITESSE THROTTLE CONTROLLER, DOUG THORLEY LT'S, CATLESS, X-PIPE, 25" STAINLESS WORKS RETRO CHAMBERED MUFFLERS, CUSTOM 2.5" MANDREL BENT EXHAUST, RICHMOND 4.10 GEARS, CUSTOM CAM (231/242 @ 114LSA), MUSTANG DYNO TUNED BY TORQ, 20% CERAMIC TINTS, EIBACH PROKIT SPRINGS 1" DROP, HAWK PERFORMANCE CERAMIC BRAKES, NITTO INVO TIRES, HYDROCARBON TAIL LIGHT AND FOG LIGHT BEZELS BY EMBLEMPROS, METRA DASH KIT, JVC KW-AV71BT, PHOENIX GOLD iAMP GM1, PASSPORT QI45 - 450 RWHP 415 RWTQ
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06-29-2014, 08:56 PM
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Search Ninja
Drives: 2010 Black 2SS/RS A6 Join Date: Oct 2009
Location: Central Ark
Posts: 7,183
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Quote:
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2010 Black 2SS/RS A6
Halltech CF 102 fed GPI modded intake manifold Bo (knows) White ported TB Kooks LT's/ Dynomax VT Pfadted (springs/sways) Dyno tuned by Rhino and GPI I once parallel parked a train. |
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06-30-2014, 04:24 PM
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#6 |
Drives: 2016 Camaro SS Join Date: Jul 2010
Location: Santa Rosa, CA
Posts: 671
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Some great troubleshooting suggestions here! If you need any further assistance or have any questions regarding your American Thunder system, please PM me. Good luck!
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06-30-2014, 08:29 PM
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HT5 in the 626
Drives: 2014 Camaro 2SS/RS Join Date: Nov 2013
Location: 626, California
Posts: 757
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I had a rattle with my American Thunder, turned out the muffler hangars were rattling against the rear bumper support because they were too long. cut them shorter and the rattle was gone!
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 2014 L99 Camaro 2SS/RS ~ Flowmaster American Thunder Catback ~ Cold Air Inductions CAI ~ VMAX Ported TB ~ ARH Catted LTs ~ Tuned by Ted @ JRE A wise man once said, he who eats crackers in bed get crummy sleep. |
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06-30-2014, 08:49 PM
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#8 |
 
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Most likely your exhaust is hitting the tunnel brace. You will need to shim it.
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2011 Camaro 2SS/RS, Circle D 3200, ADM Transmission Cooler, BTR Valvetrain, Cam Motion .621 .595 228/244 113+4, ARH 1 7/8 full exhaust, Cold Air Inductions, Katech C5R TC, Melling HV, BTR SLR lifters, Trunion Upgrade, LS2 Dampner, LS9 head gaskets, Bo White PTB, MM can, GFX, Subs, B&M Deep transmission pan,
Holley fuel rail, Proform valve covers, relocated coil packs  |
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07-01-2014, 10:08 AM
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#9 | |
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Quote:
This is the issue - watching this go down now. 
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07-01-2014, 10:45 AM
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#10 | |
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Drives: 2012 45th Anniversary 2SS LS3 Join Date: Feb 2012
Location: Charlotte, NC
Posts: 2,812
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Quote:
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07-01-2014, 11:02 AM
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#11 |
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All done. Did some wiggling/shimming/prying, in and out 20 mins tops, and a few washers to space things a bit too. No rattling over bumpy road construction, so reckon the main rattle is solved.
Thanks for the insight; it really saved time to consult the Camaro5 guild!
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