Did the headers cause this? - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

GaBoy25 · 05-23-2012, 08:03 PM

Quote:

Originally Posted by ssboy2010

Typical lsx motor and headers. Nothing you can do to get rid of it

Only thing rattling on mine were the tension springs. Other than that clearance was NOT an issue.

Pulling o2 slack from the stock wiring harness was a nailbiter though.

Chris82xx · 05-23-2012, 09:55 PM

I have a rattling noise too. I took a peek and noticed that where the x-pipe is, there's a thin brace that is vibrating because the exhaust is sitting against it. I'm gonna lift up the x-pipe, and tighten the clamps to see if it helps at all. This brace may be there because I have a convertible, but if i were you, I'd check anyway.

daveagogo1 · 05-23-2012, 10:07 PM

Quote:

Originally Posted by MagnusKrans

I see that you have a L99, make sure your exhaust isn't hitting the transmission vent tube. Its a small metal tube on the passenger side that runs right next to the exhaust. I had a metallic rattling sound coming from under my passenger seat after I put my magnaflow 3" catback on and it turned out to be vibrating against that vent tube.

I had exact same problem. The metal tube is connected directly to a rubber one above the cross member. It has no check valve in it so i just removed the small metal portion of tube. Problem solved. By the way have the Magnaflow 3" comp myself lol

Fraxum · 05-23-2012, 10:09 PM

OP, you are sure it's not the exhaust hitting the tunnel brace? Common problem after LTs. Usually you can pull the exhaust up, add some washers to lower the brace, or get an aftermarket brace with more clearance.

vrunner · 05-23-2012, 10:09 PM

I had the same issue. You have to get the car on a lift or get under it. Open your hood and grab a flashlight since you car is black it may be difficult to see. On the passenger side look up and follow your header to where it runs past the frame. You will see a few mounting screws sticking out from the frame. Not sure what they are holding since I can't see the other side but they are there. Check to make sure they are at least 3/4 of an inch away from the header. If they are any closer the header will make contact and create some ugly noises when the engine is under load. You will also see the tell tale marks on the header from where it made contact. If it is you will need a dremmel or a small cutting wheel to shorten the screw. I have looked at other Camaro's and they seem to vary in size however 11's and 12's are more common to have it longer thus causing the issue. If you find the screws are good try removing the tunnel brace to see if it goes away, they can be an issue too. Hope this solves your issue!!

Bell040 · 05-24-2012, 02:24 PM

Quote:

Originally Posted by DuhKoDuh

clearance?

I am pretty sure that he wants you to check the clearances because it sounds like something is touching the exhaust and causing a nasty vibration sound.

... that's the first thing I thought too.

... So you might want to check the clearances. Get it up on a lift and crank it up.

Chris82xx · 05-24-2012, 04:36 PM

I looked more into it myself for my car and for me it's def. that retarded metal brace that runs from one side to the other. It's a thin piece of metal so I'm not too sure if it serves any structural purpose or if it's more of a shield of some sort. the width of it is about 12" and I'd say it's about 1/32" thick.

bottjeremy · 05-24-2012, 04:58 PM

There is a thread about this on this forum. Search for noise under driver seat.

Chris82xx · 05-24-2012, 05:40 PM

I looked more into it myself for my car and for me it's def. that retarded metal brace that runs from one side to the other. It's a thin piece of metal so I'm not too sure if it serves any structural purpose or if it's more of a shield of some sort. the width of it is about 12" and I'd say it's about 1/32" thick.

cantkeeptires · 05-24-2012, 07:02 PM

Hi, guys I had a set of BBK headers installed yesterday and had the same issue. Put it on a lift and the brace was the culprit. I just loosened the cats and jacked up the catbacks before I retightened. It gave about an inch more clearance at the metal brace that runs across. Noise is gone.

DuhKoDuh · 05-25-2012, 09:45 AM

Quote:

Originally Posted by cantkeeptires

Hi, guys I had a set of BBK headers installed yesterday and had the same issue. Put it on a lift and the brace was the culprit. I just loosened the cats and jacked up the catbacks before I retightened. It gave about an inch more clearance at the metal brace that runs across. Noise is gone.

thats nice to know thanks! could you take a picture of the part youre talking about maybe?

Quote:

Originally Posted by bottjeremy

There is a thread about this on this forum. Search for noise under driver seat.

thanks!

DuhKoDuh · 12-05-2012, 02:03 PM

Quote:

Originally Posted by Chris82xx

I looked more into it myself for my car and for me it's def. that retarded metal brace that runs from one side to the other. It's a thin piece of metal so I'm not too sure if it serves any structural purpose or if it's more of a shield of some sort. the width of it is about 12" and I'd say it's about 1/32" thick.

hmmmmmmmm

Ivan @ Southwest Speed · 12-05-2012, 02:44 PM

Heat Shield touching ever so slightly or it's hitting the tunnel brace.

96% of folks hardly see it, but there are studs that come down out of the underbody that the heat shield attaches to with little nuts. These long rods often touch or rub on aftermarket exhaust/headers.

I see it all the time. Cutoff wheel solves that problem easily.

GL and keep us posted!
Ivan

05-23-2012, 09:55 PM	#30
Chris82xx Make your peace with God! Drives: 2011 Camaro SS/RS M6 Convertible Join Date: Dec 2011 Location: Dirty Jersey Posts: 1,595	I have a rattling noise too. I took a peek and noticed that where the x-pipe is, there's a thin brace that is vibrating because the exhaust is sitting against it. I'm gonna lift up the x-pipe, and tighten the clamps to see if it helps at all. This brace may be there because I have a convertible, but if i were you, I'd check anyway. __________________ ECS base supercharger (NOVI 1500SL), ECS AlKY control kit, 92mm TB, ARH 1 7/8" LT's non-catted, Borla 3" exhaust, ID850 injectors, Squash fuel system, ECS Big Blower Cam, MGW short throw shifter, DSS 1000hp axles, LGW differential cover, billet caps, Tech AFX heater hoses, Pedders differential bushings, Eaton TrueTrac differential, PRC dual valve springs, Katech C5R timing chain, ATI balancer, Meilings oil pump, Pfadt Trailing Arms, Pfadt Tie Rods, Pfadt Sway Bars, Pfadt End Links, DSS Aluminum Driveshaft 811RWHP/719RWTQ UNDER MAJOR OVERHAUL!!

05-23-2012, 10:09 PM	#32
Fraxum Drives: a M6 LT1 ordered From Becky!!! Join Date: Jan 2010 Location: NJ Posts: 7,520	OP, you are sure it's not the exhaust hitting the tunnel brace? Common problem after LTs. Usually you can pull the exhaust up, add some washers to lower the brace, or get an aftermarket brace with more clearance. __________________ "Democracy Dies in Darkness" My LT1 Keeper ..... ..... My Car Blog CarPlayList, a free App to build USB and Android Music drives.

05-23-2012, 10:09 PM	#33
vrunner Drives: 2012 T3 Edition 2SS Hurst 6M Join Date: Jul 2011 Location: NJ Posts: 161	I had the same issue. You have to get the car on a lift or get under it. Open your hood and grab a flashlight since you car is black it may be difficult to see. On the passenger side look up and follow your header to where it runs past the frame. You will see a few mounting screws sticking out from the frame. Not sure what they are holding since I can't see the other side but they are there. Check to make sure they are at least 3/4 of an inch away from the header. If they are any closer the header will make contact and create some ugly noises when the engine is under load. You will also see the tell tale marks on the header from where it made contact. If it is you will need a dremmel or a small cutting wheel to shorten the screw. I have looked at other Camaro's and they seem to vary in size however 11's and 12's are more common to have it longer thus causing the issue. If you find the screws are good try removing the tunnel brace to see if it goes away, they can be an issue too. Hope this solves your issue!! __________________ 2012 T3 edition 2SS M6 Hurst, SLP wheels, SLP headers, CAI's intake, Borla X pipe and exhaust 2008 CTS 3.6 DI AWD DD

05-24-2012, 04:36 PM	#35
Chris82xx Make your peace with God! Drives: 2011 Camaro SS/RS M6 Convertible Join Date: Dec 2011 Location: Dirty Jersey Posts: 1,595	I looked more into it myself for my car and for me it's def. that retarded metal brace that runs from one side to the other. It's a thin piece of metal so I'm not too sure if it serves any structural purpose or if it's more of a shield of some sort. the width of it is about 12" and I'd say it's about 1/32" thick. __________________ ECS base supercharger (NOVI 1500SL), ECS AlKY control kit, 92mm TB, ARH 1 7/8" LT's non-catted, Borla 3" exhaust, ID850 injectors, Squash fuel system, ECS Big Blower Cam, MGW short throw shifter, DSS 1000hp axles, LGW differential cover, billet caps, Tech AFX heater hoses, Pedders differential bushings, Eaton TrueTrac differential, PRC dual valve springs, Katech C5R timing chain, ATI balancer, Meilings oil pump, Pfadt Trailing Arms, Pfadt Tie Rods, Pfadt Sway Bars, Pfadt End Links, DSS Aluminum Driveshaft 811RWHP/719RWTQ UNDER MAJOR OVERHAUL!!

05-24-2012, 04:58 PM	#36
bottjeremy Drives: 2020 Camaro SS 1LE - Born July 2020 Join Date: Jul 2010 Location: Round Rock, TX Posts: 85 View My Garage	There is a thread about this on this forum. Search for noise under driver seat. __________________ 2020 Camaro SS 1LE

05-24-2012, 05:40 PM	#37
Chris82xx Make your peace with God! Drives: 2011 Camaro SS/RS M6 Convertible Join Date: Dec 2011 Location: Dirty Jersey Posts: 1,595	I looked more into it myself for my car and for me it's def. that retarded metal brace that runs from one side to the other. It's a thin piece of metal so I'm not too sure if it serves any structural purpose or if it's more of a shield of some sort. the width of it is about 12" and I'd say it's about 1/32" thick. __________________ ECS base supercharger (NOVI 1500SL), ECS AlKY control kit, 92mm TB, ARH 1 7/8" LT's non-catted, Borla 3" exhaust, ID850 injectors, Squash fuel system, ECS Big Blower Cam, MGW short throw shifter, DSS 1000hp axles, LGW differential cover, billet caps, Tech AFX heater hoses, Pedders differential bushings, Eaton TrueTrac differential, PRC dual valve springs, Katech C5R timing chain, ATI balancer, Meilings oil pump, Pfadt Trailing Arms, Pfadt Tie Rods, Pfadt Sway Bars, Pfadt End Links, DSS Aluminum Driveshaft 811RWHP/719RWTQ UNDER MAJOR OVERHAUL!!

05-24-2012, 07:02 PM	#38
cantkeeptires Drives: 11 2SS Join Date: May 2012 Location: Virginia Posts: 9	Hi, guys I had a set of BBK headers installed yesterday and had the same issue. Put it on a lift and the brace was the culprit. I just loosened the cats and jacked up the catbacks before I retightened. It gave about an inch more clearance at the metal brace that runs across. Noise is gone. __________________ 2011 2SS/RS, American Thunder Catback, BBK LT w/High Flo CATS, K&N CAI

12-05-2012, 02:44 PM	#41
Ivan @ Southwest Speed Drives: '15 Z06, '01 NBM SS, '97 SS Join Date: May 2009 Location: Rio Rancho, NM Posts: 12,170	Heat Shield touching ever so slightly or it's hitting the tunnel brace. 96% of folks hardly see it, but there are studs that come down out of the underbody that the heat shield attaches to with little nuts. These long rods often touch or rub on aftermarket exhaust/headers. I see it all the time. Cutoff wheel solves that problem easily. GL and keep us posted! Ivan