Vibration/Rattle from underneath - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

skongolf · 07-04-2016, 12:12 PM

I have a 2011 SS Vert and lately when going over bumps I have noticed a rattle/shake from underneath that at times you can feel through the floor pans. It only does it when going over larger bumps in the road but it has gotten more noticeable lately. I thought it may be a broken exhaust hanger but I got under the car yesterday and everything seemed to be tight. Just curious if anyone ever had a similar issue or may know what else to check.

Dimitrim · 07-04-2016, 01:15 PM

With a rubber hammer hit your cats, they can be coming loose from inside. Also hit your mufflers and resonators.

skongolf · 07-04-2016, 01:55 PM

Quote:

Originally Posted by Dimitrim

With a rubber hammer hit your cats, they can be coming loose from inside. Also hit your mufflers and resonators.

When I hit them with the rubber mallet what should I be listening for? Also the car has a flowmaster exhaust so I am not sure the mufflers are causing the rattle as it is under the floorboards but I will check them. When you say coming loose from the inside what do you mean? Coming apart(failing) or just coming loose from the pipes. Thanks

Dimitrim · 07-04-2016, 03:42 PM

The exhaust also has heat shields. Check to make sure they are not hitting anything.
When you hit the cats and mufflers they should sound solid when you hit them. If they don't they need to be replaced.

BubbaSS · 07-04-2016, 06:53 PM

Quote:

Originally Posted by skongolf

When I hit them with the rubber mallet what should I be listening for? Also the car has a flowmaster exhaust so I am not sure the mufflers are causing the rattle as it is under the floorboards but I will check them. When you say coming loose from the inside what do you mean? Coming apart(failing) or just coming loose from the pipes. Thanks

Most likely Flowmaster related...either broken baffle(s) or heatsheild rubbling...of course could be cats as well, but I'd bet on the aftermarket install in this case

The Blue Angel · 07-04-2016, 09:23 PM

Could be the exhaust pipe hitting the tunnel brace. It happens on my Camaro!!

angryv6 · 07-05-2016, 12:19 AM

Exhaust rattling against the heat shield or tunnel brace, loose connections.

skongolf · 07-05-2016, 11:33 AM

I am assuming the heat shield is above the cats or x pipe. If it is hitting or rubbing is there a fix for it?

drew peacock · 07-05-2016, 12:45 PM

Quote:

Originally Posted by The Blue Angel

Could be the exhaust pipe hitting the tunnel brace. It happens on my Camaro!!

and mine on real big bumps

07-04-2016, 12:12 PM	#1
skongolf Drives: 2011 2SS RS Black Vert Join Date: Nov 2013 Location: AZ Posts: 126	Vibration/Rattle from underneath I have a 2011 SS Vert and lately when going over bumps I have noticed a rattle/shake from underneath that at times you can feel through the floor pans. It only does it when going over larger bumps in the road but it has gotten more noticeable lately. I thought it may be a broken exhaust hanger but I got under the car yesterday and everything seemed to be tight. Just curious if anyone ever had a similar issue or may know what else to check.

07-04-2016, 09:23 PM	#6
The Blue Angel Drives: 2014 BRM 1SS/RS Join Date: Sep 2011 Location: Tampa, Fl Posts: 1,058	Could be the exhaust pipe hitting the tunnel brace. It happens on my Camaro!! __________________ 2014 Blue Ray Metallic 1SS/RS A Road Warrior

07-05-2016, 12:19 AM	#7
angryv6 Lake Erie Monster Drives: 02 Hyundai Santa Fe and 13 300 Join Date: Aug 2012 Location: Ohio Posts: 917	Exhaust rattling against the heat shield or tunnel brace, loose connections. __________________ Everything I say is to be taken as an opinion and not fact so don't get upset over words that spill out of my head. GO CAVS!

07-04-2016, 01:15 PM	#2
Dimitrim Dimitri Drives: 68 GTO 455 Ram Air; 2014 Camaro ZL1 Join Date: Jan 2014 Location: Novato, California Posts: 602 View My Garage	With a rubber hammer hit your cats, they can be coming loose from inside. Also hit your mufflers and resonators.

07-04-2016, 03:42 PM	#4
Dimitrim Dimitri Drives: 68 GTO 455 Ram Air; 2014 Camaro ZL1 Join Date: Jan 2014 Location: Novato, California Posts: 602 View My Garage	The exhaust also has heat shields. Check to make sure they are not hitting anything. When you hit the cats and mufflers they should sound solid when you hit them. If they don't they need to be replaced.

07-05-2016, 11:33 AM	#8
skongolf Drives: 2011 2SS RS Black Vert Join Date: Nov 2013 Location: AZ Posts: 126	I am assuming the heat shield is above the cats or x pipe. If it is hitting or rubbing is there a fix for it?