PCV valve questions for the LT-5 - CorvetteForum - Chevrolet Corvette Forum Discussion


C4 ZR-1 Discussion General ZR-1 Corvette Discussion, LT5 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track

PCV valve questions for the LT-5

Reply
 
 
 
Thread Tools Search this Thread
Old 03-28-2010, 08:19 PM   #1  
C1ANDZR1
CF Senior Member
Thread Starter
 
C1ANDZR1's Avatar
 
Member Since: Nov 2004
Location: Tifton Georgia
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
Default PCV valve questions for the LT-5

Hi everyone,

I need some help from the brotherhood. I am finishing up the winter maintenance on my '91 and got the correct part number PCV valves (CV913C and CV769C) from my local Chevy dealer, but now I have a couple of questions. First, which one goes on which side? When I pulled the old PCV valves off, the one on the drivers side was a CV913, which was one of the correct part numbers, and the passenger side was a CV746C which apparently was for various late 60's and early 70's Corvettes and Camaros. My next question is, how much of an effect would the wrong PCV have on the amount of oil in the plenum, as there was more than the usual film?

Thanks,

Jason
C1ANDZR1 is offline   Reply With Quote
Old 03-28-2010, 11:39 PM   #2  
Goldcylon
Tech Contributor
 
Goldcylon's Avatar
 
Member Since: Aug 2006
Location: Glendale Arizona.. Resident Gold Cylon
Posts: 9,675
Thanked 68 Times in 65 Posts
Default

Jason the PVC insert top portion is stepped. Each pvc valve has a stop ring so the PVC valves can only fit in one way to be flush.
Goldcylon is offline   Reply With Quote
Old 03-29-2010, 08:07 AM   #3  
C1ANDZR1
CF Senior Member
Thread Starter
 
C1ANDZR1's Avatar
 
Member Since: Nov 2004
Location: Tifton Georgia
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Goldcylon View Post
Jason the PVC insert top portion is stepped. Each pvc valve has a stop ring so the PVC valves can only fit in one way to be flush.
Goldcylon, I see what you are talking about now. I was confused because on my car the CV913C was on the drivers side instead of the passenger side and the incorrect CV746C was on the passenger side. I guess someone in the past replaced them and thought they were all the same. Could that explain the excessive oil in the plenum?
C1ANDZR1 is offline   Reply With Quote
Old 03-29-2010, 10:32 AM   #4  
Goldcylon
Tech Contributor
 
Goldcylon's Avatar
 
Member Since: Aug 2006
Location: Glendale Arizona.. Resident Gold Cylon
Posts: 9,675
Thanked 68 Times in 65 Posts
Default

Quote:
Originally Posted by C1ANDZR1 View Post
Goldcylon, I see what you are talking about now. I was confused because on my car the CV913C was on the drivers side instead of the passenger side and the incorrect CV746C was on the passenger side. I guess someone in the past replaced them and thought they were all the same. Could that explain the excessive oil in the plenum?

There should always be a small amount of oil in the plenum so unless its significant I would not worry about it. A lot of folks use a catch can inline in order to eliminate some of this buildup in the plenum. I still need to do mine. You then drain the catch can back into the system. Daryll
Goldcylon is offline   Reply With Quote
Old 12-05-2010, 10:16 AM   #5  
MRDZR1
CF Senior Member
 
MRDZR1's Avatar
 
Member Since: Sep 2009
Location: Sherbrooke Quebec
Posts: 408
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Goldcylon View Post
There should always be a small amount of oil in the plenum so unless its significant I would not worry about it. A lot of folks use a catch can inline in order to eliminate some of this buildup in the plenum. I still need to do mine. You then drain the catch can back into the system. Daryll
Good morning Goldcylon!

Have you installed your catch can yet since this thread was issued?

If so, any pics or tricks for the LT-5? I want to install one in mine because it suck up some oil once a while when I drive my car hard on the track. Since I don't have cats it's easy to see the puffs of smokes through the rear view mirror in those conditions.

Regards,

MRDZR1 is offline   Reply With Quote
Old 12-06-2010, 09:38 AM   #6  
Goldcylon
Tech Contributor
 
Goldcylon's Avatar
 
Member Since: Aug 2006
Location: Glendale Arizona.. Resident Gold Cylon
Posts: 9,675
Thanked 68 Times in 65 Posts
Default

Quote:
Originally Posted by MRDZR1 View Post
Good morning Goldcylon!

Have you installed your catch can yet since this thread was issued?

If so, any pics or tricks for the LT-5? I want to install one in mine because it suck up some oil once a while when I drive my car hard on the track. Since I don't have cats it's easy to see the puffs of smokes through the rear view mirror in those conditions.

Regards,

No I have not yet. Latest mod was a homelink sunvisor.
Goldcylon is offline   Reply With Quote
Old 12-06-2010, 10:54 AM   #7  
Aurora40
CF Senior Member
 
Aurora40's Avatar
 
Member Since: Apr 2005
Location: The Old Dominion
Posts: 6,415
Thanks: 0
Thanked 1 Time in 1 Post
Default



Got the can from http://www.customcorvetteaccessories...lcatchcan.html

Just cut and bent a piece of metal to hold it. And cut and bent the PCV line to attach it. Obviously that might be a sticking point for some people.
Aurora40 is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • PCV valve questions for the LT-5
  •  
     
    Reply

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    PCV Valve CV913C Help to Source TealZR1 C4 ZR-1 Discussion 3 01-31-2017 07:49 PM
    CV 590 or CV 590C valve 62gal C1 & C2 Corvettes 4 04-07-2013 05:37 AM
    1972 PCV "T" Connector Part Number? PhilaScott C3 Tech/Performance 1 12-02-2011 12:02 AM
    PCV valve CV913C ammrpm C4 ZR-1 Discussion 2 02-11-2011 12:08 AM
    Bob, PCV Valve Question SafetyAgentMan Ken's Newsletters 5 06-11-2004 02:34 PM


    Tags
    cv746c, cv913c, location, lt, lt5, pcv, pvc, valve, vette, zr1

    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 03:15 AM.


    We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
     
    • Ask a Question
      Get answers from community experts
    Question Title:
    Description:
    Your question will be posted in: