LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

Strange exhaust sound

Thread Tools
 
Search this Thread
 
Old Jun 30, 2013 | 06:59 PM
  #1  
iMuf's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2013
Posts: 69
Likes: 0
Default Strange exhaust sound

Hey everyone, So seems like I'm starting to have some little issues coming up. I had my air conditioner go out. And I'm also having a strange exhaust sound. I have a 2006 Monte Carlo SS. The stock exhaust has always sounded pretty decent. But recently when I started turning my car on I would get almost like a rattle type sound out of the left exhaust/muffler. It was a northern car that made it's way down south which is where I got it. So it's got a fair amount of rust on it, kind of like you would expect out a 7 year old "northern" car. I thought one of the mounts maybe came loose and it was actually rattling but after crawling under the car, everything looks fine. Now here is the other thing that makes me think it is the exhaust or the muffler, when I drive and roll my windows down I can hear almost like a "chuffing" out of the left side under normal acceleration and then if you accelerate harder it goes back to sounding like normal. When I first got my car I thought about just getting a new exhaust anyway but then I kind of grew to like the stock sound. But now after running into this issue I'm back to thinking about it again. For those who know exhausts a little better then me, does it sound like just the mufflers or does it sound like an actual exhaust issue? If I can just change the mufflers then I will go that route, but if it is an exhaust issue then I may just do it right and get new headers and have some custom piping done to get rid of the u-bend. Any help would be much appreciated. Thanks guys
Reply
Old Jul 1, 2013 | 07:13 PM
  #2  
ryanisl33t's Avatar
On The Tree
iTrader: (1)
 
Joined: Mar 2007
Posts: 154
Likes: 0
Default

My driver side stock muffler is going out, rattles like hell until the car is warmed up.
Reply
Old Jul 2, 2013 | 09:43 AM
  #3  
El Cid's Avatar
Teching In
 
Joined: Aug 2010
Posts: 44
Likes: 0
Default

Drop your exhaust down at the rear hangers, and look at the tops of the mufflers... they're likely rotted out at the seams.
Reply
Old Jul 2, 2013 | 08:39 PM
  #4  
RedHotG8's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: May 2010
Posts: 1,419
Likes: 1
From: Chicagoland
Default

It could be something loose inside the mufflers or inside the cat.
Reply
Old Jul 2, 2013 | 09:04 PM
  #5  
iMuf's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2013
Posts: 69
Likes: 0
Default

Originally Posted by RedHotG8
It could be something loose inside the mufflers or inside the cat.
Yea, it's something crazy. I'm going to check the top of the muffler tomorrow and see if it is rusting through up top. Hopefully that's all it is. I don't want to have to replace the whole exhaust if I don't need to lol
Reply
Old Jul 3, 2013 | 08:16 PM
  #6  
iMuf's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2013
Posts: 69
Likes: 0
Default

So I checked it out and my muffler is in fact rusting out from up top. So I found the strange sound issue. I'm going to buy some new mufflers this weekend, I'm probably going to get the Spintech pro street 6000 series. I've listened to a ton of mufflers for the Monte Carlo SS and that sounds the best by far. Now I know the 06' Monte Carlo SS has an offset inlet and a center outlet. My question is what size inlet/outlet do I need? Do I need a 2.25 inch or a 2.5 inch? I have a completely stock exhaust so I need whatever size matches up with that. Thanks everyone.
Reply




All times are GMT -5. The time now is 02:54 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE