Generation IV External Engine LS2 | LS3 | LS7 | L92 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

LS3 Valley Cover PCV?

Thread Tools
 
Search this Thread
 
Old Apr 18, 2013 | 09:14 AM
  #1  
RENE'S RAGE's Avatar
Thread Starter
9 Second Club
iTrader: (96)
 
Joined: Nov 2007
Posts: 2,387
Likes: 3
From: Memphis, TN
Default LS3 Valley Cover PCV?

How does the PCV work on the LS3 valley cover?
I see there's a nipple on the cover, where does it connect to?
I have LS1 valve covers, trying to figure out to plumb my pcv lines. Wanting to run breathers instead of sucking oil back into the intake.
Race car only.
Reply
Old Apr 18, 2013 | 07:24 PM
  #2  
Alvin@PCMofNC's Avatar
LS1Tech Sponsor
 
Joined: Mar 2013
Posts: 288
Likes: 1
From: Mooresville, NC
Default

The valley cover and the drivers rear valve cover are both high vacuum side ports for the PVC. Only one is used normally. Valve cover for most truck applications and valley cover for say 2010+ Camaro. They do not have check valves in them but both are restricted or metered. The drivers front valve cover is a unrestricted vent. So... Take a line from behind the throttle body to either the valley cover port or the drivers rear port. Then take the passenger side port to somewhere before the throttle body.

The idea of all PCV setups is to make a fresh air loop.
__________________

See what's in our shop on Facebook! Customer Build Blogs!
www.pcmofnc.com
Performance Installs - Dyno Tuning - Custom Camshafts & Valvetrain - Remote HPtuners Tuning - Mail Order Tuning & Sales
704-307-4227
Reply
Old Apr 19, 2013 | 11:47 AM
  #3  
RENE'S RAGE's Avatar
Thread Starter
9 Second Club
iTrader: (96)
 
Joined: Nov 2007
Posts: 2,387
Likes: 3
From: Memphis, TN
Default

Does the LS3 valley cover have a built in PCV valve?
Can I just run a hose from the valley cover nipple to the pass side valve cover, and put a breather on the valve cover?
Will this be enought to pull the gases from the valley cover?
I don't want to recirculate the gases back into the intake.
Reply
Old Apr 19, 2013 | 03:38 PM
  #4  
Crowhater's Avatar
Registered User
 
Joined: Mar 2013
Posts: 15
Likes: 0
From: Momtgomery Texas
Default

Originally Posted by RENE'S RAGE
Does the LS3 valley cover have a built in PCV valve?
Can I just run a hose from the valley cover nipple to the pass side valve cover, and put a breather on the valve cover?
Will this be enought to pull the gases from the valley cover?
I don't want to recirculate the gases back into the intake.
on the C6 corvette bunch of guys run a breather on the end of the hose that comes off the intake nipple and plug the intake manifold port.

check this link out.

http://forums.corvetteforum.com/c6-t...an-needed.html
Reply
Old Apr 21, 2013 | 07:56 AM
  #5  
MertezWS6's Avatar
On The Tree
iTrader: (8)
 
Joined: Mar 2011
Posts: 149
Likes: 0
From: Maplewood, MN
Default

Originally Posted by Crowhater
on the C6 corvette bunch of guys run a breather on the end of the hose that comes off the intake nipple and plug the intake manifold port.

check this link out.

http://forums.corvetteforum.com/c6-t...an-needed.html
Thanks for sharing that! Useful info in there
Reply
Old Apr 21, 2013 | 10:31 AM
  #6  
RENE'S RAGE's Avatar
Thread Starter
9 Second Club
iTrader: (96)
 
Joined: Nov 2007
Posts: 2,387
Likes: 3
From: Memphis, TN
Default

Whew, that was a long read, but I think the first page answered my question.
Thanks, great info.
Reply
Old Apr 22, 2013 | 07:23 AM
  #7  
Alvin@PCMofNC's Avatar
LS1Tech Sponsor
 
Joined: Mar 2013
Posts: 288
Likes: 1
From: Mooresville, NC
Default

Originally Posted by RENE'S RAGE
Does the LS3 valley cover have a built in PCV valve?
Can I just run a hose from the valley cover nipple to the pass side valve cover, and put a breather on the valve cover?
Will this be enought to pull the gases from the valley cover?
I don't want to recirculate the gases back into the intake.
GM has moved from using PCV check valves it seems and instead use restricted orifices. The valley cover and the drivers rear valve cover are both restricted ports intended for high vacuum side of the PCV. As for breathers that is an option to but we try our hardest not to use them as they can bring oily smells inside the cab. If we have to use them we will but if we can get away from it we will not. To stop excessive oil consumption look for a good catch can.


We will have our own catch can in a matter of a week or two. Check pcmofnc.com we will have them up on our website.
__________________

See what's in our shop on Facebook! Customer Build Blogs!
www.pcmofnc.com
Performance Installs - Dyno Tuning - Custom Camshafts & Valvetrain - Remote HPtuners Tuning - Mail Order Tuning & Sales
704-307-4227
Reply
Old Apr 22, 2013 | 10:24 AM
  #8  
RENE'S RAGE's Avatar
Thread Starter
9 Second Club
iTrader: (96)
 
Joined: Nov 2007
Posts: 2,387
Likes: 3
From: Memphis, TN
Default

Race car only.
Really don't want to plumb back into intake.
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
Old Sep 3, 2017 | 07:09 PM
  #9  
Batman09's Avatar
Teching In
 
Joined: Dec 2012
Posts: 6
Likes: 0
Default

Originally Posted by Alvin@PCMofNC
The valley cover and the drivers rear valve cover are both high vacuum side ports for the PVC. Only one is used normally. Valve cover for most truck applications and valley cover for say 2010+ Camaro. They do not have check valves in them but both are restricted or metered. The drivers front valve cover is a unrestricted vent. So... Take a line from behind the throttle body to either the valley cover port or the drivers rear port. Then take the passenger side port to somewhere before the throttle body.

The idea of all PCV setups is to make a fresh air loop.
Sorry...old thread....can I just plug the drivers side rear port...2014 ls3 crate motor...thanks bm
Reply
Old Jan 14, 2018 | 10:02 PM
  #10  
BennyB's Avatar
TECH Fanatic
15 Year Member
iTrader: (12)
 
Joined: Sep 2005
Posts: 1,079
Likes: 4
From: Omaha, NE
Default

Did you leave the fresh air line from pass valve cover to throttle body? Or run a breather on valve cover? I’m asking bc I’m debating what to do with the PCV on my new engine swap. I have the ls3 valley and was thinking of just running a breather off of it so I don’t have a chance of sucking oil into the intake. I was also going to run a breather for fresh air side or just leave the fresh air line as mentioned.
Reply
Old Jan 16, 2018 | 04:00 PM
  #11  
U WISH's Avatar
Teching In
iTrader: (9)
 
Joined: Jul 2008
Posts: 19
Likes: 0
From: Texas
Default

Originally Posted by Batman09
Sorry...old thread....can I just plug the drivers side rear port...2014 ls3 crate motor...thanks bm
I've been searching high and low for an answer to this exact question. anyone?
Reply
Old Jan 16, 2018 | 04:39 PM
  #12  
BennyB's Avatar
TECH Fanatic
15 Year Member
iTrader: (12)
 
Joined: Sep 2005
Posts: 1,079
Likes: 4
From: Omaha, NE
Default

Originally Posted by U WISH
I've been searching high and low for an answer to this exact question. anyone?
Yes plug that one if you are using ls6/ ls3 valley cover. I only used that port for pcv when I was using ls1 style pcv
Reply




All times are GMT -5. The time now is 03:36 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