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

Can exhaust systems be pressure tested?

Thread Tools
 
Search this Thread
 
Old Nov 6, 2006 | 02:08 PM
  #1  
Gary Z's Avatar
Thread Starter
10 Second Club
 
Joined: Nov 2002
Posts: 1,471
Likes: 3
From: Berkeley, California
Default Can exhaust systems be pressure tested?

If I cap or plug the throttle body, can I then pressurize the exhaust system from the tail pipe to, say, 5 psi? Will my intake manifold burst? Is this a stupid idea?
Reply
Old Nov 6, 2006 | 02:55 PM
  #2  
kornfreak_401's Avatar
12 Second Club
iTrader: (77)
 
Joined: Sep 2005
Posts: 1,744
Likes: 0
From: BCS/DFW TX
Default

all i know is that i wouldnt do that....
Reply
Old Nov 6, 2006 | 03:56 PM
  #3  
MjMaro's Avatar
TECH Fanatic
iTrader: (11)
 
Joined: Apr 2006
Posts: 1,047
Likes: 0
From: Woodridge, IL
Default

Originally Posted by kornfreak_401
all i know is that i wouldnt do that....

+1...
Reply
Old Nov 6, 2006 | 04:27 PM
  #4  
YouCantCmyZ28's Avatar
12 Second Club
iTrader: (7)
 
Joined: Jul 2005
Posts: 275
Likes: 0
From: La Plata Maryland
Default

why would you want to do that?
Reply
Old Nov 6, 2006 | 04:33 PM
  #5  
notatruews6's Avatar
Has Unresolved Sales In Feedback/12 second club
iTrader: (3)
 
Joined: Sep 2006
Posts: 214
Likes: 0
From: Just outside of Springfiled Missouri.
Default

WHY? to see if you can blow a whole bunch of carbon into the intake? of course the intake would take 5psi theres s/c and turbo cars that run up to 24lbs of boost or 24psi in the intake.
Reply
Old Nov 6, 2006 | 04:35 PM
  #6  
Gary Z's Avatar
Thread Starter
10 Second Club
 
Joined: Nov 2002
Posts: 1,471
Likes: 3
From: Berkeley, California
Default

Originally Posted by notatruews6
WHY? to see if you can blow a whole bunch of carbon into the intake? of course the intake would take 5psi theres s/c and turbo cars that run up to 24lbs of boost or 24psi in the intake.
No, my hope is to find leaks or verify that there are none. Good point about boosted cars - Thanks.
Reply
Old Nov 6, 2006 | 04:37 PM
  #7  
landstuhltaylor's Avatar
TECH Fanatic
iTrader: (6)
 
Joined: Aug 2006
Posts: 1,279
Likes: 46
From: CBUS
Default

the safest way would be to take it off the car and do that
Reply
Old Nov 6, 2006 | 05:08 PM
  #8  
ls1_doc's Avatar
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2004
Posts: 699
Likes: 0
From: redding ca
Default

We have a smoke machine that puts smoke in the exhaust system and comes out of all the little exhaust leaks if there are any. Its heated mineral oil so it is very very white and you can see it very good
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Nov 6, 2006 | 05:42 PM
  #9  
Gary Z's Avatar
Thread Starter
10 Second Club
 
Joined: Nov 2002
Posts: 1,471
Likes: 3
From: Berkeley, California
Default

Originally Posted by ls1_doc
We have a smoke machine that puts smoke in the exhaust system and comes out of all the little exhaust leaks if there are any. Its heated mineral oil so it is very very white and you can see it very good
This is probably what I should pursue. Thanks!
Reply
Old Nov 6, 2006 | 06:28 PM
  #10  
LS1Lust's Avatar
TECH Regular
 
Joined: Jan 2006
Posts: 469
Likes: 0
From: Tempe, AZ
Default

do you just spray the smoke in the intake?
Reply
Old Nov 6, 2006 | 07:33 PM
  #11  
bayer-z28's Avatar
TECH Veteran
20 Year Member
iTrader: (14)
 
Joined: Apr 2005
Posts: 4,085
Likes: 1
From: N. Falmouth MA
Default

All you have to do to find any leaks is have a buddy w/ welding gloves put his hand over the tail pipes and you walk around under the car listening for hissing. (while car is running)... Take your hand off the pipes every couple seconds.

You don't have to press ULTRA tight to make a complete seal, just enough to create SOME pressure. You'll hear it from underneath if there is a leak.
Reply
Old Nov 9, 2006 | 01:46 PM
  #12  
ls1_doc's Avatar
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2004
Posts: 699
Likes: 0
From: redding ca
Default

Originally Posted by LS1Lust
do you just spray the smoke in the intake?
You sure can. Its a wonderful tool for seeing if there is an intake leak on a car.
Reply
Old Nov 9, 2006 | 01:51 PM
  #13  
RA4926's Avatar
Banned
iTrader: (19)
 
Joined: Apr 2006
Posts: 1,160
Likes: 0
Default

Originally Posted by bayer-z28
All you have to do to find any leaks is have a buddy w/ welding gloves put his hand over the tail pipes and you walk around under the car listening for hissing. (while car is running)... Take your hand off the pipes every couple seconds.

You don't have to press ULTRA tight to make a complete seal, just enough to create SOME pressure. You'll hear it from underneath if there is a leak.
what if the car has an exhaust system other than stock?
Reply
Old Nov 9, 2006 | 02:02 PM
  #14  
ls1_doc's Avatar
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2004
Posts: 699
Likes: 0
From: redding ca
Default

You mean like if its extra loud ?
Reply
Old Nov 9, 2006 | 03:04 PM
  #15  
Demon Of Dreams's Avatar
TECH Enthusiast
iTrader: (3)
 
Joined: Mar 2006
Posts: 714
Likes: 0
From: Houston...
Default

Originally Posted by ls1_doc
You mean like if its extra loud ?
like its got 8 tips or something

4 friends, 4 pairs of gloves
Reply
Old Nov 9, 2006 | 11:32 PM
  #16  
mullenh's Avatar
TECH Enthusiast
iTrader: (1)
 
Joined: Oct 2006
Posts: 506
Likes: 0
From: pensacola, florida
Post 1967 tempest

Originally Posted by Gary Z
If I cap or plug the throttle body, can I then pressurize the exhaust system from the tail pipe to, say, 5 psi? Will my intake manifold burst? Is this a stupid idea?
yes it can be leak tested, and no your manifold won't burst. we call it a smoke machine around the shop it will find any kind of air leak.
Reply
Old Nov 10, 2006 | 01:31 PM
  #17  
ls1_doc's Avatar
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2004
Posts: 699
Likes: 0
From: redding ca
Default

^^ Thats not what he was talking about but yours is the correct way to do it. He wanted to seal the exhaust system with pressure.
Reply
Old Nov 10, 2006 | 11:00 PM
  #18  
mullenh's Avatar
TECH Enthusiast
iTrader: (1)
 
Joined: Oct 2006
Posts: 506
Likes: 0
From: pensacola, florida
Post 67 tempest

Originally Posted by ls1_doc
^^ Thats not what he was talking about but yours is the correct way to do it. He wanted to seal the exhaust system with pressure.
yes you can leak test exhaust or intake ,(how about that)
Reply




All times are GMT -5. The time now is 12:44 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE