Thats what I did for my covers, too. 
PCV Valve Question
Thread Starter
Instructor
Joined: Feb 2008
Posts: 201
Likes: 0
From: The Ham AL
PCV Valve Question
Last weekend I noticed I have two PCV valves. One on each side of the engine. A friend confirmed he only has one on the driver's side of the engine.
Is there anything wrong with this? My car runs with a lope like it might have a cam, but I don't know since I have only had the car a few months. I have uncovered fuel pressure drop off too early and a low vacuum issue (just for some background).
Any thoughts? Should I remove one of them? Why would there be two to begin with?
Is there anything wrong with this? My car runs with a lope like it might have a cam, but I don't know since I have only had the car a few months. I have uncovered fuel pressure drop off too early and a low vacuum issue (just for some background).
Any thoughts? Should I remove one of them? Why would there be two to begin with?
Race Director
Joined: Jun 2004
Posts: 13,942
Likes: 705
From: WI
Are you sure there is a valve there? My year had a breather there that looks like a PCV valve on the passenger side but it is not.
Fuel pressure drop off sounds like a failing pump, line obstruction, or poor electrical feed to the pump. To test, unplug the vac line at the FPR and run it to WOT to see if the pressure falls off.
Fuel pressure drop off sounds like a failing pump, line obstruction, or poor electrical feed to the pump. To test, unplug the vac line at the FPR and run it to WOT to see if the pressure falls off.
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
I'm on my second Vette. My first was a 92 LT1 and my 95 LT1. Both of them had One (1) PCV which is on the drivers side of the engine. There is an "air line" that goes from the valve cover to the TB (passenger side).
If there is a second PCV, I'd love to know..You'll be surprised, the chevy dealer's computers says that my Vette uses four (4) O2 sensors...It has three (3).
If there is a second PCV, I'd love to know..You'll be surprised, the chevy dealer's computers says that my Vette uses four (4) O2 sensors...It has three (3).
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
Driver's side should have the PCV, passenger side has a breather. When I bought new valve covers, had to use different PCV and breather, so I bought 2 PCV and removed the valve from one of them to use as a breather. Take yours out and shake it, if it rattles, then its a PCV. I wouldnt leave it in there if that is the case.
Thread Starter
Instructor
Joined: Feb 2008
Posts: 201
Likes: 0
From: The Ham AL
FYI - I have removed both PCVs and both rattle like they are in good shape.
Someone asked for an engine pic.
So, if I remove the passenger side PCV, can I buy the breather side plastic piece to plug my vacuum hose into from the local store? It seems that the suggestion so far is to remove the valve from one side.
Also, I have an 89 model.
Thanks for the posts.
Someone asked for an engine pic.
So, if I remove the passenger side PCV, can I buy the breather side plastic piece to plug my vacuum hose into from the local store? It seems that the suggestion so far is to remove the valve from one side.
Also, I have an 89 model.
Thanks for the posts.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
Yes you can (and should) remove the valve from the passenger side. Technically you could just pull it out and leave it open, but then you would have unfiltered air getting in there. They also make push in breathers with a little filter you can use as well, looks like this...
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
And if it has two PCV valves were does the air enter to purge the crankcase gases.
As noted pathway should be metered air from
TB - rocker cover - PCV valve in other cover - intake port
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
oops sorry I didnt know that. I just ran a rubber hose into the valve cover from the TB on mine. Good thing I didnt use one of those.
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
Yes you can (and should) remove the valve from the passenger side. Technically you could just pull it out and leave it open, but then you would have unfiltered air getting in there. They also make push in breathers with a little filter you can use as well, looks like this...
As AGENT 86 said, don't do it on a MAF car.
-Beppe-