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

Is this an Intake Leak?

Thread Tools
 
Search this Thread
 
Old Apr 30, 2015 | 03:29 PM
  #1  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default Is this an Intake Leak?

Bad intake gasket?:

What do you guys think?

No fluid leaks, just the smoke.
Reply
Old Apr 30, 2015 | 05:12 PM
  #2  
99Bluz28's Avatar
TECH Senior Member
iTrader: (35)
 
Joined: Nov 2007
Posts: 9,705
Likes: 12
From: C. V., Kalifornia
Default

Does it smell like coolant, or is the smoke oily ?
Reply
Old Apr 30, 2015 | 05:18 PM
  #3  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

Smells oily
Reply
Old Apr 30, 2015 | 05:18 PM
  #4  
Darth_V8r's Avatar
Moderator
10 Year Member
Liked
Loved
Community Favorite
iTrader: (4)
 
Joined: Jul 2014
Posts: 10,450
Likes: 1,873
From: My own internal universe
Default

Almost looks like blow by gases coming through the valley cover gasket or front timing cover gasket right above the water pump. Your PCV plugged or the vacuum line between the PCV and intake broken?
Reply
Old Apr 30, 2015 | 05:35 PM
  #5  
99Bluz28's Avatar
TECH Senior Member
iTrader: (35)
 
Joined: Nov 2007
Posts: 9,705
Likes: 12
From: C. V., Kalifornia
Default

Imo, after watching the video a bunch of times, it looks like its coming from somewhere around the top center to top right side of the timing cover.
Reply
Old Apr 30, 2015 | 05:52 PM
  #6  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

Ok, maybe just try to make sure everything is tight?
Reply
Old Apr 30, 2015 | 05:55 PM
  #7  
ULTIMATEORANGESS's Avatar
TECH Senior Member
20 Year Member
iTrader: (4)
 
Joined: Mar 2003
Posts: 10,985
Likes: 23
From: eatontown,nj
Default

best way to tell is to get a smoke machine.
Reply
Old Apr 30, 2015 | 08:58 PM
  #8  
an-i-no's Avatar
Teching In
iTrader: (1)
 
Joined: May 2014
Posts: 16
Likes: 0
Default

If you take off your oil cap does the smoke come from there as well? Looks like crankcase gasses to me maybe?

How is your PCV system setup?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-1

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

 Verdad Gallardo
story-2

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

 Pouria Savadkouei
story-3

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

 Verdad Gallardo
story-4

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-5

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-6

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-7

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

 Verdad Gallardo
story-8

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-9

10 Camaros You Should Never Buy

 
Old Apr 30, 2015 | 09:21 PM
  #9  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

Originally Posted by an-i-no
If you take off your oil cap does the smoke come from there as well? Looks like crankcase gasses to me maybe?

How is your PCV system setup?
I'm thinking crankcase now too. The breather is smoking like crazy now. Thinking my rings are shot. I have a hose off each valve cover running to one catch can/breather.
Reply
Old Apr 30, 2015 | 09:33 PM
  #10  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

Yes the smoke comes out like a train with the oil cap off, but stops smoking from the intake area. Smokes so bad it fills up my garage with 2 does open.
Reply
Old Apr 30, 2015 | 09:43 PM
  #11  
an-i-no's Avatar
Teching In
iTrader: (1)
 
Joined: May 2014
Posts: 16
Likes: 0
Default

Originally Posted by onesloGTO
Yes the smoke comes out like a train with the oil cap off, but stops smoking from the intake area. Smokes so bad it fills up my garage with 2 does open.
Yeah then it's definitely crankcase gasses/blow by. When you take the cap off it gives it somewhere else to escape from.

Sounds like rings/ringlands unfortunately I would try a compression test, and then another compression test with a little bit of oil in each cyl before you tear it apart though. May be something simple.

Did this just start suddenly?
Reply
Old Apr 30, 2015 | 09:57 PM
  #12  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

I just did a compression test a few weeks ago. I've owned the car just a few months. For the past month its been having problems. Finally got it running decent.

It's smoked a little but has been getting worse.
Reply
Old Apr 30, 2015 | 10:15 PM
  #13  
an-i-no's Avatar
Teching In
iTrader: (1)
 
Joined: May 2014
Posts: 16
Likes: 0
Default

Originally Posted by onesloGTO
I just did a compression test a few weeks ago. I've owned the car just a few months. For the past month its been having problems. Finally got it running decent.

It's smoked a little but has been getting worse.
Ok I watched the vid again. I see Corvette accessories and a turbo so first check this out https://ls1tech.com/forums/generatio...ting-ok-4.html
Reply
Old Apr 30, 2015 | 10:38 PM
  #14  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

I read some of it and looked at the diagrams. But I don't really understand that stuff.
Reply
Old May 1, 2015 | 12:21 PM
  #15  
Darth_V8r's Avatar
Moderator
10 Year Member
Liked
Loved
Community Favorite
iTrader: (4)
 
Joined: Jul 2014
Posts: 10,450
Likes: 1,873
From: My own internal universe
Default

PCV needs vacuum to work. If you are boosted, you might not be getting vacuum to your PCV, so the gases build up in your crankcase and find a way out anywhere they can. You probably need to be drawing vacuum from between your air filter and turbo if you aren't.

Also, verify the hoses are intact and the valve isn't plugged or stuck
Reply
Old May 1, 2015 | 12:44 PM
  #16  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

I'll draw something up on how my hoses are routed so you guys can tell me if it's right.
Reply
Old May 1, 2015 | 04:05 PM
  #17  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

Here is a shitty picture of how things are routed.

Name:  20150501_160204_zpsklrmal7t.jpg
Views: 25
Size:  384.6 KB

Name:  20150414_125849_zpswbvvmjkj.jpg
Views: 31
Size:  527.6 KB

Last edited by onesloGTO; May 1, 2015 at 04:10 PM.
Reply
Old May 1, 2015 | 05:22 PM
  #18  
Darth_V8r's Avatar
Moderator
10 Year Member
Liked
Loved
Community Favorite
iTrader: (4)
 
Joined: Jul 2014
Posts: 10,450
Likes: 1,873
From: My own internal universe
Default

Looks like you have nothing pulling from the crank case, so your PCV is not doing anything. Try this equally crappy drawing for what should work to fix it. Eliminate the hose with an X through it. Add the yellow and orange hoses. The orange hose should connect between the filter and turbo for vacuum. You will need a one-way check valve in the yellow hose to make sure the airflow is only toward the throttle body


Reply
Old May 1, 2015 | 09:33 PM
  #19  
onesloGTO's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Oct 2011
Posts: 243
Likes: 0
From: Kansas
Default

Should this be capped?


Name:  20150501_212855_zpst2ynfmk9.jpg
Views: 27
Size:  525.4 KB
Reply
Old May 1, 2015 | 11:11 PM
  #20  
kinglt-1's Avatar
TECH Senior Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (26)
 
Joined: Jul 2005
Posts: 5,898
Likes: 255
From: Ft. Wayne, IN
Default

No that is suppose to connect to the passenger side valve cover. It looks like to me the entire PCV system has been deleted or something. Google "LS1 PCV System". Plenty of diagram pics out there.
Reply



All times are GMT -5. The time now is 07:53 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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