Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Can't get old exhaust off!

Thread Tools
 
Search this Thread
 
Old Dec 28, 2006 | 04:32 PM
  #1  
giant016's Avatar
Thread Starter
TECH Apprentice
iTrader: (4)
 
Joined: Oct 2005
Posts: 327
Likes: 0
From: Southampton, MA
Default Can't get old exhaust off!

I bought a Loudmouth Catback, and am having trouble getting the stock system off. I already cut the pipe where it bends over the axle, and from there on out the system is off. The problem I have is that the pipe (I think it's called the "I" pipe) that connects right after the two exhaust pipes up front connect, the ones from the cats. I took the clamp off, but the pipes are stuck in each other after years of being clamped. We pulled, put a pipefitter's wrench in there and hit it with a mallet to try to turn it, thus breaking the seal, and we even heated it with a torch. On Sunday we're going to try to cut off the "I" pipe without damaging the male end, but do you guys have any other suggestions as to how to pull it off? It's on there REAL good. I was thinking of tying it to a tree and driving off, but my dads afraid that I'll damaged the manifolds seeing how hard this pipe is stuck. Thanks!
Reply
Old Dec 28, 2006 | 04:35 PM
  #2  
tim99ws6's Avatar
9 Second Club
iTrader: (31)
 
Joined: Oct 2002
Posts: 3,175
Likes: 2
From: Nashville, TN
Default

You should NEVER cut that pipe. The entire catback(including the I pipe) can be taken off as a whole, and it is much easier. Plus, having the catback/muffler not cut off allows you to hold the tips of the exhaust as leverage and you can bust the weld that is on the I-pipe to the y-pipe

As for your problem now, the factory actually spot welds the y-pipe to the I-pipe. The only answer would be to get in there with a chisel if you can to get on that weld and bust it. That or you could just that the entire Y-pipe system off, and work on it from out from under the car. Might be able to get a better angle to beat on it then.
Reply
Old Dec 28, 2006 | 04:38 PM
  #3  
sidewayz28's Avatar
TECH Junkie
iTrader: (24)
 
Joined: Jul 2005
Posts: 3,548
Likes: 1
From: seattle
Default

man exhaust is just a bitch... you just gota take the time and muscle
Reply
Old Dec 28, 2006 | 04:55 PM
  #4  
68birdls1's Avatar
11 Second Club
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (46)
 
Joined: Feb 2004
Posts: 1,667
Likes: 0
From: jacksonville, fl
Default

spray some wd 40 or some pb blaster in there and then try
Reply
Old Dec 28, 2006 | 05:01 PM
  #5  
lt1formula2000's Avatar
TECH Regular
iTrader: (10)
 
Joined: Dec 2004
Posts: 479
Likes: 0
From: oklahoma
Default

PB blaster, a chisel sredbriver prybar or what ever you have and a BIG hammer. Swing pry some swing pry some repeat. I have an air so thats what I use and it works great.
Reply
Old Dec 31, 2006 | 11:04 PM
  #6  
02SSCamaro#9751's Avatar
Banned
 
Joined: Dec 2006
Posts: 132
Likes: 0
Default

Originally Posted by tim99ws6
You should NEVER cut that pipe. The entire catback(including the I pipe) can be taken off as a whole, and it is much easier. Plus, having the catback/muffler not cut off allows you to hold the tips of the exhaust as leverage and you can bust the weld that is on the I-pipe to the y-pipe

As for your problem now, the factory actually spot welds the y-pipe to the I-pipe. The only answer would be to get in there with a chisel if you can to get on that weld and bust it. That or you could just that the entire Y-pipe system off, and work on it from out from under the car. Might be able to get a better angle to beat on it then.
That is what I did i took it off in one whole peice.
Reply
Old Jan 1, 2007 | 12:52 AM
  #7  
01Z28M6's Avatar
TECH Resident
 
Joined: Oct 2005
Posts: 781
Likes: 0
From: Taxme, Ohio
Default

I know you've got it by now but here's what I would use:

http://store.summitracing.com/partde...5&autoview=sku
Reply
Old Jan 1, 2007 | 09:11 AM
  #8  
senicalj4579's Avatar
10 Second Club
20 Year Member
Liked
Loved
Community Favorite
iTrader: (41)
 
Joined: Jan 2006
Posts: 5,260
Likes: 24
Default

you have to just keep lubing it up and try to loosen it up. thats something that is gonna take some time and pateince. also keep trying to tap at the joint with a screwdriver and hammer. dont stop sprayin with wd-40 either. also use a wire brush to scrub some of the rust out from the joint
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo




All times are GMT -5. The time now is 09:38 AM.

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