No PCV on the "04???
Thread Starter
Burning Brakes
Joined: Aug 2006
Posts: 753
Likes: 2
From: Denville NJ
No PCV on the "04???
During a recent "tune up", I picked up a pcv valve and can't find the location of the existing one! Checking out a multitude of searches, it seems that there are several arrangements including "no pcv" but a fixed orifice.
Can someone confirm the situation with the "04 C5? I see where the tube curls up into the passenger side behind the throttle body, but there is no pcv valve there. Thanks
Can someone confirm the situation with the "04 C5? I see where the tube curls up into the passenger side behind the throttle body, but there is no pcv valve there. Thanks
Pro
Joined: Aug 2007
Posts: 619
Likes: 1
From: ATLANTA GA
from everything Ive heard, The 04s had the fixed orphice to improve oil consumption issues. There would be no need to a PCV if you had the fixed orphice..
Does your line come from the valley covers to the side of the manifiold behind the throttle body?
Does your line come from the valley covers to the side of the manifiold behind the throttle body?
Thread Starter
Burning Brakes
Joined: Aug 2006
Posts: 753
Likes: 2
From: Denville NJ
Thanks for the comments. I think I know a pcv when I see one, and here I don't. The passenger side valve cover features a vent to the throttle body upper housing, as well as plumbing running around the rear of the engine to the driver side with associated plumbing. I don't intend to modify this arrangemen, just looking to replace the valve if it had one.
Le Mans Master
Joined: Sep 2003
Posts: 6,275
Likes: 226
From: Farmington CT
Cruise-In VII Veteran
let's clarify this, in 2004 the LS1 started to use the SAME valley cover as the 01-04 Z06/LS6 motors........
ALTHOUGH, the 'U' tube that connects the valley cover to the RHS of the intake does not use a pcv valve IIRC
the mess of vent tubes that ran from the LHS valve cover to the RHS vc was also omitted, just like the LS6 setup
you will find a plug in the aft LHS vc
this is a 2004 ONLY LS1 change
you'll also notice the 2001 LS6 air intake, has the small 'slit' opening in the box cover
the O2 sensors also use the newer style LS2 connectors, just some of the '04 only changes
ALTHOUGH, the 'U' tube that connects the valley cover to the RHS of the intake does not use a pcv valve IIRC
the mess of vent tubes that ran from the LHS valve cover to the RHS vc was also omitted, just like the LS6 setup
you will find a plug in the aft LHS vc
this is a 2004 ONLY LS1 change
you'll also notice the 2001 LS6 air intake, has the small 'slit' opening in the box cover
the O2 sensors also use the newer style LS2 connectors, just some of the '04 only changes
Tech Contributor
Joined: Jan 2007
Posts: 19,398
Likes: 1,139
From: Dyer, IN
let's clarify this, in 2004 the LS1 started to use the SAME valley cover as the 01-04 Z06/LS6 motors........
ALTHOUGH, the 'U' tube that connects the valley cover to the RHS of the intake does not use a pcv valve IIRC
the mess of vent tubes that ran from the LHS valve cover to the RHS vc was also omitted, just like the LS6 setup
you will find a plug in the aft LHS vc
this is a 2004 ONLY LS1 change
you'll also notice the 2001 LS6 air intake, has the small 'slit' opening in the box cover
the O2 sensors also use the newer style LS2 connectors, just some of the '04 only changes
ALTHOUGH, the 'U' tube that connects the valley cover to the RHS of the intake does not use a pcv valve IIRC
the mess of vent tubes that ran from the LHS valve cover to the RHS vc was also omitted, just like the LS6 setup
you will find a plug in the aft LHS vc
this is a 2004 ONLY LS1 change
you'll also notice the 2001 LS6 air intake, has the small 'slit' opening in the box cover
the O2 sensors also use the newer style LS2 connectors, just some of the '04 only changes
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Race Director
Joined: Jan 2006
Posts: 10,554
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From: Not on either liberal coast.
I've got to ask the original poster, how did you select the PCV for your '04 tuneup? The books/computer wouldn't show it and there's obviously dozens of various configurations.
As to the waste can question above, I installed one from ELITE ENGINEERING (site supporting vendor) on my '04 Z16. My driving style doesn't really need one according to some opinions when the same question was asked in the past.
I installed one anyway. I remove less than an ounce with every PM service on the car, about once a year. It might not justify it to some, but it's an ounce of oil not going into the intake.
As to the waste can question above, I installed one from ELITE ENGINEERING (site supporting vendor) on my '04 Z16. My driving style doesn't really need one according to some opinions when the same question was asked in the past.
I installed one anyway. I remove less than an ounce with every PM service on the car, about once a year. It might not justify it to some, but it's an ounce of oil not going into the intake.
Last edited by hotwheels57; Sep 16, 2008 at 12:21 PM.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
let's clarify this, in 2004 the LS1 started to use the SAME valley cover as the 01-04 Z06/LS6 motors........
ALTHOUGH, the 'U' tube that connects the valley cover to the RHS of the intake does not use a pcv valve IIRC
the mess of vent tubes that ran from the LHS valve cover to the RHS vc was also omitted, just like the LS6 setup
you will find a plug in the aft LHS vc
this is a 2004 ONLY LS1 change
you'll also notice the 2001 LS6 air intake, has the small 'slit' opening in the box cover
the O2 sensors also use the newer style LS2 connectors, just some of the '04 only changes
ALTHOUGH, the 'U' tube that connects the valley cover to the RHS of the intake does not use a pcv valve IIRC
the mess of vent tubes that ran from the LHS valve cover to the RHS vc was also omitted, just like the LS6 setup
you will find a plug in the aft LHS vc
this is a 2004 ONLY LS1 change
you'll also notice the 2001 LS6 air intake, has the small 'slit' opening in the box cover
the O2 sensors also use the newer style LS2 connectors, just some of the '04 only changes
Last edited by ZeeOSix; Sep 16, 2008 at 09:18 PM.
