LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

LT1 No PCV valve ?

Thread Tools
 
Search this Thread
 
Old Aug 13, 2014 | 03:20 PM
  #1  
4586's Avatar
Thread Starter
Registered User
 
Joined: Oct 2004
Posts: 211
From: Champlain, NY
LT1 No PCV valve ?

Just noticed that this 95 LT1 doesn't have a PCV valve....direct vent? When did they stop using PCV valves?
Old Aug 13, 2014 | 04:53 PM
  #2  
Pullngz's Avatar
Registered User
 
Joined: May 1999
Posts: 215
From: St.Louis.Mo,USA
Re: LT1 No PCV valve ?

Should be on the passenger side of the intake, centered front to back. It connects to a port below the throttle body.

Mike
Old Aug 13, 2014 | 05:00 PM
  #3  
Injuneer's Avatar
Administrator
 
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Re: LT1 No PCV valve ?

Actually, it's on the driver side of the intake manifold.

Shoebox has a photo of it.



You were probably looking at the line from the throttle body to the passenger side valve cover, and expecting it to be the elbow that plugs into the valve cover. That line supplies filtered, MAF measured air from in front of the throttle blades to the valve cover, where the vacuum from the PCV valve on the other side of the intake pulls it through the crankcase to remove the harmful blowby products.

The vacuum source for the 95-97 PCV system is the intake manifold port under the throttle body.

Last edited by Injuneer; Aug 13, 2014 at 05:04 PM.
Old Aug 13, 2014 | 05:08 PM
  #4  
Injuneer's Avatar
Administrator
 
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Re: LT1 No PCV valve ?

It's also shown on the emissions routing label on the radiator cover, again, courtesy of Shoebox:

http://shbox.com/1/emission_hose_routing.jpg
Old Aug 13, 2014 | 05:18 PM
  #5  
Pullngz's Avatar
Registered User
 
Joined: May 1999
Posts: 215
From: St.Louis.Mo,USA
Re: LT1 No PCV valve ?

I stand corrected, I knew it was on the DRIVERS side, and still typed passenger.
Old Aug 13, 2014 | 06:44 PM
  #6  
4586's Avatar
Thread Starter
Registered User
 
Joined: Oct 2004
Posts: 211
From: Champlain, NY
Re: LT1 No PCV valve ?

Originally Posted by Injuneer
Actually, it's on the driver side of the intake manifold.

You were probably looking at the line from the throttle body to the passenger side valve cover, and expecting it to be the elbow that plugs into the valve cover. That line supplies filtered, MAF measured air from in front of the throttle blades to the valve cover, where the vacuum from the PCV valve on the other side of the intake pulls it through the crankcase to remove the harmful blowby products.

The vacuum source for the 95-97 PCV system is the intake manifold port under the throttle body.
Fred

Thanks you are right on..the PCV valve doesn't stick out as you would normally expect. What started this is that I am planning on installing after market valve covers and studying the valve cover ports required.

The elbow (line) on the passenger side doesn't appear to have any filtering inside..should it?

Ed
Old Aug 13, 2014 | 07:48 PM
  #7  
Chimera96's Avatar
Registered User
 
Joined: Jun 2003
Posts: 1,113
Re: LT1 No PCV valve ?

Originally Posted by 4586
The elbow (line) on the passenger side doesn't appear to have any filtering inside..should it? Ed
No filter on that line

on aftermarket VC, get "LT1" specific. The PS one is notched to clear alternator. Pulling alternator apart and rotating rear case has worked for some using non-notched SBC valve covers.
Old Aug 13, 2014 | 08:19 PM
  #8  
bw_hunter's Avatar
Registered User
 
Joined: Jul 2002
Posts: 1,942
From: Kissimmee, Fl, USA
Re: LT1 No PCV valve ?

Originally Posted by Chimera96
No filter on that line

on aftermarket VC, get "LT1" specific. The PS one is notched to clear alternator. Pulling alternator apart and rotating rear case has worked for some using non-notched SBC valve covers.
Actually you need F Body specific LT1 VC..the other versions don't have the alternator mounted differently...
Old Aug 13, 2014 | 09:49 PM
  #9  
4586's Avatar
Thread Starter
Registered User
 
Joined: Oct 2004
Posts: 211
From: Champlain, NY
Re: LT1 No PCV valve ?

The engine is going in a streetrod...have the alternator mocked up "down low"...should make it easier to locate valve covers.

Name:  ALTlt1.jpg
Views: 2662
Size:  14.9 KB
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
HectorM52
Parts For Sale
26
Jul 30, 2017 11:46 AM
oldschool
Parts For Sale
16
Feb 9, 2016 09:21 PM
Roadie
Parts For Sale
7
Feb 16, 2015 10:34 AM
thenewkid
Parts For Sale
3
Nov 29, 2014 04:54 PM
Hot Rod Hawk
Midwest
4
Aug 30, 2002 10:12 PM




All times are GMT -5. The time now is 09:57 AM.