Mystery Sound....I need your help - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ZZcamaro · 08-09-2009, 08:28 AM

I have a mystery sound, or rattle, or grinding sound, in my car that I would like to know what you folks think it could be.

When I start driving there is no problem....but once the car heats up, I get a rattle, or grind sound around the feet area of the driver. It only does it when the car is finally warmed up. It seems to be on the driver's side, and not in the driveline. I figure it has something to do with exhaust, because it did not start until after me did some exhaust work!!

But when I go underneath to check it out, all the clamps are good and tight. I also could not find anything close enough to the exhaust to be rattling! Only think I did not check was how tight the O2 sensors are...but they are tight enough I could not spin them with my fingers.

Again this seems to only be on the driver's side near my feet once the car heats up. Does the stainless move once it is heated? Any input would be very helpful....

SGOS252382 · 08-09-2009, 08:46 AM

Could be the headers are rubbing against something. Especially if it happens when your making a turn or weight is being transferred from one side to the other.

ZZcamaro · 08-09-2009, 09:26 AM

Headers seem to have room. I could not find any area where it is close to anything.

It originally only did it when the car was under "load"...;.now it does it more often

Croatcamaro2010 · 08-09-2009, 09:34 AM

i would call cartalk ask click and clack

BackinBlackSS/RS · 08-09-2009, 10:33 AM

Quote:

Originally Posted by ZZcamaro

It originally only did it when the car was under "load"...;.now it does it more often

This would leave me to believe it is something that is slowly loosening up. The more it loosens the more your gonna hear it. Now, you just need to figure out what it is.

rayhawk · 08-09-2009, 10:41 AM

When you say the clamps are tight, did you put a socket on them to check? Remember that as it gets hot, the clearances get bigger. I always like to retighten exhaust flanges and connections after a bit of run time. Also, if you can tighten it while the system is warm (be careful) that should help.

Doc · 08-09-2009, 04:31 PM

Do you feel anything in the clutch pedal or shift knob when this is happening? Might be something in the clutch plate. Or maybe something is sitting loose inside the header pipe; like something is hung in the collector.

JDBeck23 · 08-09-2009, 04:47 PM

ZZ, I torqued my clamps to 65 ft/lbs per magnaflows directions. I also sheared one of the bolts in half in the process.... I would suggest climbing under and torquing them down to at least 55 ft/lbs.

I had two places where I ran into rattles in the exhaust setup, at the "gasketless flange" just past the crossover brace, and where the magnaflow pipe passed by the rear diff.

If your pipes arent perfectly centered down the middle of the tunnel at the "gasketless flange", the bracket will rub and rattle on a small screw that's sticking out of the frame that the heat shielding is attatched to underneath the car. Might be your noise.

56chevywagon · 08-09-2009, 04:48 PM

Off topic of mechanical problems but does it only occur when your A/C is on? I have noticed in all of my GM cars and trucks now including the Camaro that the A/C fan makes a humming/grinding sound that matches RPM's when the A/C clutch engages.

ZZcamaro · 08-09-2009, 07:41 PM

I am going to take some time and try to re-tighten everything tomorrow, then run it until hot, and re tighten.

I idea that it is something slowly looseninf sounds right!! But what it is I do not know. I am going to have to find something. I checked the clearance every where in the system and there is no less than 1/2 inch in any place.

Thanks for the input...I will keep checking back for more ideas of what it could be.

08-09-2009, 08:28 AM	#1
ZZcamaro Drives: 2SS w/ ZZ427 Package!! Join Date: Oct 2008 Location: Pittsburgh, PA Posts: 2,700	Mystery Sound....I need your help I have a mystery sound, or rattle, or grinding sound, in my car that I would like to know what you folks think it could be. When I start driving there is no problem....but once the car heats up, I get a rattle, or grind sound around the feet area of the driver. It only does it when the car is finally warmed up. It seems to be on the driver's side, and not in the driveline. I figure it has something to do with exhaust, because it did not start until after me did some exhaust work!! But when I go underneath to check it out, all the clamps are good and tight. I also could not find anything close enough to the exhaust to be rattling! Only think I did not check was how tight the O2 sensors are...but they are tight enough I could not spin them with my fingers. Again this seems to only be on the driver's side near my feet once the car heats up. Does the stainless move once it is heated? Any input would be very helpful....

08-09-2009, 10:41 AM	#6
rayhawk Drives: Trailblazer SS Join Date: Aug 2008 Location: Miami Posts: 1,005 View My Garage	When you say the clamps are tight, did you put a socket on them to check? Remember that as it gets hot, the clearances get bigger. I always like to retighten exhaust flanges and connections after a bit of run time. Also, if you can tighten it while the system is warm (be careful) that should help. __________________ Hooters, hooters, yum yum yum, hooters, hooters on a girl thats dumb. -Al Bundy 07 2WD Trailblazer SS, LS1 E-fans, 4" FWI, pcmforless tune

08-09-2009, 04:31 PM	#7
Doc Dances With Mustangs Drives: 2010 1SS/RS MT Join Date: May 2009 Location: USA Posts: 3,647 View My Garage	Do you feel anything in the clutch pedal or shift knob when this is happening? Might be something in the clutch plate. Or maybe something is sitting loose inside the header pipe; like something is hung in the collector. __________________ Blue Angel is here!! 1SS/RS LS3 M6 IBM

08-09-2009, 04:47 PM	#8
JDBeck23 Drives: 2010 Camaro, 2SS/RS Join Date: May 2009 Location: King George, Va Posts: 881	ZZ, I torqued my clamps to 65 ft/lbs per magnaflows directions. I also sheared one of the bolts in half in the process.... I would suggest climbing under and torquing them down to at least 55 ft/lbs. I had two places where I ran into rattles in the exhaust setup, at the "gasketless flange" just past the crossover brace, and where the magnaflow pipe passed by the rear diff. If your pipes arent perfectly centered down the middle of the tunnel at the "gasketless flange", the bracket will rub and rattle on a small screw that's sticking out of the frame that the heat shielding is attatched to underneath the car. Might be your noise. __________________ 2010 2SS/RS CGM American Racing Headers, Magnaflow axle back, Roto-Fab CAI, Audio Integrations Sub box, Alpine Type R 10, Alpine MRP-500 amp, Pro Clips iPhone Mount

08-09-2009, 04:48 PM	#9
56chevywagon Drives: 10 Camaro SS - 03 Silverado SS Join Date: Oct 2008 Location: Phoenix Posts: 75	Off topic of mechanical problems but does it only occur when your A/C is on? I have noticed in all of my GM cars and trucks now including the Camaro that the A/C fan makes a humming/grinding sound that matches RPM's when the A/C clutch engages. __________________ 2003 Silverado SS - Mods: Polished Radix S/C 3.10 pulley, Jerry's Transmissions Inc (Sprayed99) Built Tranny, Yank TT3000 Stall Converter, MSD Super Conductor 8.5 Wires, Airaid box w/ K&N Cone Filter, Flex-A-Lite 282 Elec. Fans, Flowmaster 50 Series Mufflers, Helwig Rear Anti Sway Bar, and a Shopman SS Bowtie. 2010 Camaro RS/SS- VIN 9852 - 2SS, RS Package, Inferno Orange w/ Cyber Gray Stripes, Inferno Orange Interior Accents, Body Color Engine Covers, Sunroof

08-09-2009, 08:46 AM	#2
SGOS252382 Drives: 2010 Camaro 2SS/RS Join Date: Mar 2008 Location: S.W. Florida Posts: 6,294	Could be the headers are rubbing against something. Especially if it happens when your making a turn or weight is being transferred from one side to the other.

08-09-2009, 09:26 AM	#3
ZZcamaro Drives: 2SS w/ ZZ427 Package!! Join Date: Oct 2008 Location: Pittsburgh, PA Posts: 2,700	Headers seem to have room. I could not find any area where it is close to anything. It originally only did it when the car was under "load"...;.now it does it more often

08-09-2009, 09:34 AM	#4
Croatcamaro2010 Drives: '10 Camaro RS 1LT Join Date: Jul 2009 Location: Saint Louis Posts: 322 View My Garage	i would call cartalk ask click and clack

08-09-2009, 07:41 PM	#10
ZZcamaro Drives: 2SS w/ ZZ427 Package!! Join Date: Oct 2008 Location: Pittsburgh, PA Posts: 2,700	I am going to take some time and try to re-tighten everything tomorrow, then run it until hot, and re tighten. I idea that it is something slowly looseninf sounds right!! But what it is I do not know. I am going to have to find something. I checked the clearance every where in the system and there is no less than 1/2 inch in any place. Thanks for the input...I will keep checking back for more ideas of what it could be.

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