pcv amw catch can?
Former Vendor
Joined: Feb 2004
Posts: 10,876
Likes: 8
From: Las Vegas NV
St. Jude Donor '06 & '12
This is the short and skinny version
It catches the oil vapor that is coming out of your crank case and allows it to collect in a can, rather than allowing it to be sucked back into your intake.
Jeff
It catches the oil vapor that is coming out of your crank case and allows it to collect in a can, rather than allowing it to be sucked back into your intake.
Jeff
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Originally Posted by AMERICAN_HP
This is the short and skinny version
It catches the oil vapor that is coming out of your crank case and allows it to collect in a can, rather than allowing it to be sucked back into your intake.
Jeff
It catches the oil vapor that is coming out of your crank case and allows it to collect in a can, rather than allowing it to be sucked back into your intake.
Jeff
Do we need the valve if have the can????? What symptoms would we see if no PCV valve
Mine is an 04 (original owner) and there is no valve in the hose loop. However I did have H/C with Fast&LS2 TB.....so its possible it did not get replaced.........
I'm just a stupid Dentist..........I believe what you are saying but there does seem to others who believe there is no external valve on some cars????
DH
Melting Slicks
Joined: Jul 2004
Posts: 2,507
Likes: 0
From: Wilmington Ca.
I'm just a stupid Dentist..........I believe what you are saying but there does seem to others who believe there is no external valve on some cars????
Howard you are not a stupid dentist. At least I don't think so. Your car (2004 C5) is Ok. You just have the Z06 valley cover with the internal baffled vent tube. It didn't come with the external plastic PCV valve in the line going to the TB. So, don't worry about the PCV. Just get your ride ready for Saturday.
Howard you are not a stupid dentist. At least I don't think so. Your car (2004 C5) is Ok. You just have the Z06 valley cover with the internal baffled vent tube. It didn't come with the external plastic PCV valve in the line going to the TB. So, don't worry about the PCV. Just get your ride ready for Saturday.
Former Vendor
Joined: Feb 2004
Posts: 10,876
Likes: 8
From: Las Vegas NV
St. Jude Donor '06 & '12
Originally Posted by frank dupuy
I'm just a stupid Dentist..........I believe what you are saying but there does seem to others who believe there is no external valve on some cars????
Howard you are not a stupid dentist. At least I don't think so. Your car (2004 C5) is Ok. You just have the Z06 valley cover with the internal baffled vent tube. It didn't come with the external plastic PCV valve in the line going to the TB. So, don't worry about the PCV. Just get your ride ready for Saturday.
Howard you are not a stupid dentist. At least I don't think so. Your car (2004 C5) is Ok. You just have the Z06 valley cover with the internal baffled vent tube. It didn't come with the external plastic PCV valve in the line going to the TB. So, don't worry about the PCV. Just get your ride ready for Saturday.
An LS6 VAlley cover DOES NOT have a PCV valve in it. It has an oil baffle/seperator that stops most of the oil from being blown out the PCV system and into your intake.
Here is an EXCELLENT example of what I am talking about. After this, I am done with trying to make you guys understand that you need a PCV valve.
http://www.ls1howto.com/index.php?article=18
Document ID# 883772
2004 Chevrolet Corvette
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Crankcase Ventilation System Description
A closed crankcase ventilation system is used in order to provide a more complete scavenging of crankcase vapors. Fresh air from the throttle body is supplied to the crankcase, mixed with the blow-by vapors and then passed through a crankcase ventilation valve and into the intake manifold. The primary component in the positive crankcase ventilation (PCV) system is the PCV valve, the valve meters the flow of blow-by vapors at a certain rate depending on manifold vacuum. To maintain idle quality, the PCV valve restricts the vapor flow when manifold vacuum is high. If abnormal operating conditions arise, the PCV system is designed to allow excessive amounts of blow-by vapors to back flow through the crankcase vent tube and into the engine air inlet to be consumed be normal combustion. The engine ventilation system was developed to minimize oil consumption and ensure that oil ingestion could not occur during vehicle limit handling maneuvers.
LS1 Engine
On the LS1 engine, filtered fresh air is routed from up stream of the throttle blade to the front of the right valve rocker arm cover through a formed rubber hose. To reduce the potential of oil pullover into the throttle bore area due to back flow of the ventilation system; the fitting in the right side rocker cover is shielded from the rocker arms and their oil spray. Blow-by vapors are routed from the rear of both rocker covers, through molded nylon lines to a tee fitting located on the centerline of the engine at the rear of the intake manifold. From there, a single nylon line carries the vapors through an externally mounted, horizontal PCV valve and enters the intake manifold behind the throttle body.
The dual draw PCV system was developed to meet the limited handling maneuver requirements. During sustained passively lateral accelerations, the outboard cover may fill with oil. The dual draw system passively switches, allowing the PCV valve to draw on the rocker cover with the least resistance. This results in the system drawing on the air filled, or inboard rocker cover and eliminates oil pullover due to drawing on the oil filled outboard rocker cover.
The PCV valve is connected to the PCV valve pipe. The PCV valve pipe is attached to the coolant air bleed pipe by a cable with an integral fastener. This cable transfers heat to the PCV valve to eliminate condensation build-up in the PCV system. This also aids in eliminating throttle body icing.
LS6 Engine
The LS6 engine utilizes an integral PCV system. The PCV system is moved into the engine's valley. The valley cover has composite oil separating baffles and PCV plumbing incorporated. The filtered fresh air is routed from up stream of the throttle blade to the front of the right valve rocker arm cover through a formed rubber hose. To reduce the potential of oil pullover into the throttle bore area due to back flow of the ventilation system; the fitting in the right side rocker cover is shielded from the rocker arms and their oil spray. Blow-by vapors are routed from the valley cover, through a formed rubber hose that carries the vapors through an externally mounted, horizontal PCV valve and enters the intake manifold behind the throttle body.
--------------------------------------------------------------------------------
Document ID# 883772
2004 Chevrolet Corvette
2004 Chevrolet Corvette
--------------------------------------------------------------------------------
Crankcase Ventilation System Description
A closed crankcase ventilation system is used in order to provide a more complete scavenging of crankcase vapors. Fresh air from the throttle body is supplied to the crankcase, mixed with the blow-by vapors and then passed through a crankcase ventilation valve and into the intake manifold. The primary component in the positive crankcase ventilation (PCV) system is the PCV valve, the valve meters the flow of blow-by vapors at a certain rate depending on manifold vacuum. To maintain idle quality, the PCV valve restricts the vapor flow when manifold vacuum is high. If abnormal operating conditions arise, the PCV system is designed to allow excessive amounts of blow-by vapors to back flow through the crankcase vent tube and into the engine air inlet to be consumed be normal combustion. The engine ventilation system was developed to minimize oil consumption and ensure that oil ingestion could not occur during vehicle limit handling maneuvers.
LS1 Engine
On the LS1 engine, filtered fresh air is routed from up stream of the throttle blade to the front of the right valve rocker arm cover through a formed rubber hose. To reduce the potential of oil pullover into the throttle bore area due to back flow of the ventilation system; the fitting in the right side rocker cover is shielded from the rocker arms and their oil spray. Blow-by vapors are routed from the rear of both rocker covers, through molded nylon lines to a tee fitting located on the centerline of the engine at the rear of the intake manifold. From there, a single nylon line carries the vapors through an externally mounted, horizontal PCV valve and enters the intake manifold behind the throttle body.
The dual draw PCV system was developed to meet the limited handling maneuver requirements. During sustained passively lateral accelerations, the outboard cover may fill with oil. The dual draw system passively switches, allowing the PCV valve to draw on the rocker cover with the least resistance. This results in the system drawing on the air filled, or inboard rocker cover and eliminates oil pullover due to drawing on the oil filled outboard rocker cover.
The PCV valve is connected to the PCV valve pipe. The PCV valve pipe is attached to the coolant air bleed pipe by a cable with an integral fastener. This cable transfers heat to the PCV valve to eliminate condensation build-up in the PCV system. This also aids in eliminating throttle body icing.
LS6 Engine
The LS6 engine utilizes an integral PCV system. The PCV system is moved into the engine's valley. The valley cover has composite oil separating baffles and PCV plumbing incorporated. The filtered fresh air is routed from up stream of the throttle blade to the front of the right valve rocker arm cover through a formed rubber hose. To reduce the potential of oil pullover into the throttle bore area due to back flow of the ventilation system; the fitting in the right side rocker cover is shielded from the rocker arms and their oil spray. Blow-by vapors are routed from the valley cover, through a formed rubber hose that carries the vapors through an externally mounted, horizontal PCV valve and enters the intake manifold behind the throttle body.
--------------------------------------------------------------------------------
Document ID# 883772
2004 Chevrolet Corvette
Last edited by Jeff @ TPE; Sep 15, 2005 at 02:31 AM.
Pro
Joined: Jun 2005
Posts: 529
Likes: 0
From: North Carolina
Originally Posted by AMERICAN_HP
Theres no point. I can not convince you anyways. I dont know the circumstances behind your car. I dont know if you bought it new or used.
I will say this though. 100% of ALL C5 corvettes that leave the plant of GM, have a (External) PCV Valve. Whether you believe me or not is up to you.
Obviously what ever you do as a profession, you have more inside knowledge of a Corvette than I do as an employee of GM.
If you car does not have an external PCV valve (or check valve of some sort) I suggest you get one, cause its only a matter of time that you will need a new motor..
BTW, There is no such thing as an "Internal" pcv valve.
I will say this though. 100% of ALL C5 corvettes that leave the plant of GM, have a (External) PCV Valve. Whether you believe me or not is up to you.
Obviously what ever you do as a profession, you have more inside knowledge of a Corvette than I do as an employee of GM.
If you car does not have an external PCV valve (or check valve of some sort) I suggest you get one, cause its only a matter of time that you will need a new motor..
BTW, There is no such thing as an "Internal" pcv valve.
I bought mine new and it doesn't have one externally. That's all I know. And oil isn't blowing all over the place..... heck, my catch can hasn't even caught anything.
If mine is missing the part I want to make it right, but I've talked to at least 4 or 5 other people whose 2004 cars are setup the same as mine. You seem very adamant about it though, so you're making me wonder. Do you know any LS1 design engineers you could ask since you work for GM? Maybe there was an undocumented change for '04 after the model year started or after the shop manuals were printed?
Not sure what the deal is here...... ?
Last edited by H20Vette; Sep 15, 2005 at 10:03 AM.
Melting Slicks
Joined: Jun 2004
Posts: 2,836
Likes: 110
From: El Paso TX.
my 04 Z does not have an external PCV, the dealership told me that they were internal. i installed a air compressor filter on mine and i collects a **** load of oil. its alomost if i have to empty it everytime i drive it.
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
The article clearly states the PCV "valve" is internal on a 2004 LS6. I don't see the point in arguing that. I find it ironic that American_HP is contradicting himslef w/ posting that article. But that doesn't mean you can't (or shouldn't) install a catch-can between the valve cover and throttle-body.
Last edited by Dan_the_C5_Man; Sep 16, 2005 at 12:26 AM.
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Originally Posted by Dan_the_C5_Man
The article clearly states the PVC "valve" is internal on a 2004 LS6. I don't see the point in arguing that. I find it ironic that American_HP is contradicting himslef w/ posting that article. But that doesn't mean you can't (or shouldn't) install a catch-can between the valve cover and throttle-body.
some people just refuse to learn
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Former Vendor
Joined: Feb 2004
Posts: 10,876
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From: Las Vegas NV
St. Jude Donor '06 & '12
Originally Posted by Dan_the_C5_Man
The article clearly states the PVC "valve" is internal on a 2004 LS6. I don't see the point in arguing that. I find it ironic that American_HP is contradicting himslef w/ posting that article. But that doesn't mean you can't (or shouldn't) install a catch-can between the valve cover and throttle-body.
This is why people end up doing wrong performance mods to their cars. If you think a PCV valve on a o4 LS6 is internal, then my friend, whatever you do, dont work on your own car (not aimed directly at you)..
I'm NOT saying that to be mean, I am mearly stating fact.I'm not pulling this information out of my a$$.
Last edited by Jeff @ TPE; Sep 15, 2005 at 04:17 PM.
Pro
Joined: Jun 2005
Posts: 529
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From: North Carolina
Originally Posted by AMERICAN_HP
It says "INTEGRAL" not internal..
This is why people end up doing wrong performance mods to their cars. If you think a PCV valve on a o4 LS6 is internal, then my friend, whatever you do, dont work on your own car (not aimed directly at you).. I'm NOT saying that to be mean, I am mearly stating fact.
I'm not pulling this information out of my a$$.
This is why people end up doing wrong performance mods to their cars. If you think a PCV valve on a o4 LS6 is internal, then my friend, whatever you do, dont work on your own car (not aimed directly at you)..
I'm NOT saying that to be mean, I am mearly stating fact.I'm not pulling this information out of my a$$.
All sarcasm and whatnot aside... do you think those of use who just have a "loop" between the valley cover and throttle body have taken our PCV valves off and thrown them away? I want an explanation for why the '03s have PCVs like your pictures and all the '04 owners I have talked to do not have an external PCV. Even a dealership told one guy above that it was internal for '04.
Explanation?
Last edited by H20Vette; Sep 15, 2005 at 04:39 PM.
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Originally Posted by AMERICAN_HP
I dont mean to beat a dead horse here. But I dont want people to be armed with the WRONG information.
An LS6 VAlley cover DOES NOT have a PCV valve in it. It has an oil baffle/seperator that stops most of the oil from being blown out the PCV system and into your intake.
Here is an EXCELLENT example of what I am talking about. After this, I am done with trying to make you guys understand that you need a PCV valve.
http://www.ls1howto.com/index.php?article=18
An LS6 VAlley cover DOES NOT have a PCV valve in it. It has an oil baffle/seperator that stops most of the oil from being blown out the PCV system and into your intake.
Here is an EXCELLENT example of what I am talking about. After this, I am done with trying to make you guys understand that you need a PCV valve.
http://www.ls1howto.com/index.php?article=18
Or maybe GM jsut forgot to put them on.......
DH
Team Owner
Joined: May 2001
Posts: 36,836
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Now I'm curious too. I'm wondering if there is a "California cars" vs. "Federal cars" component to this story. If anyone finds out, let us know.
Pro
Joined: Jun 2005
Posts: 529
Likes: 0
From: North Carolina
Originally Posted by LoneStarFRC
Now I'm curious too. I'm wondering if there is a "California cars" vs. "Federal cars" component to this story. If anyone finds out, let us know.
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Originally Posted by AMERICAN_HP
It says "INTEGRAL" not internal..
This is why people end up doing wrong performance mods to their cars. If you think a PCV valve on a o4 LS6 is internal, then my friend, whatever you do, dont work on your own car (not aimed directly at you).. I'm NOT saying that to be mean, I am mearly stating fact.
I'm not pulling this information out of my a$$.
This is why people end up doing wrong performance mods to their cars. If you think a PCV valve on a o4 LS6 is internal, then my friend, whatever you do, dont work on your own car (not aimed directly at you)..
I'm NOT saying that to be mean, I am mearly stating fact.I'm not pulling this information out of my a$$.
But semantics aside, re-read your post; "The LS6 engine utilizes an integral PCV system. The PCV system is moved into the engine's valley." So why would you need two "PCV systems"?No offence taken.. I'm dead-nuts in the middle of a cam swap.. I sure hope I know what I'm doing, or I'd better stop now and call an "engine doctor!"
Working for GM, surely you've had the occasion to experience mid-year changes, or documentation that is out of date, or no longer accurate.
I believe you (and I've seen pics) of cars with a PCV valve in the loop, but I also don't believe that the significant number of cars w/o them were removed by their owners, or the factory "screwed up" on those cars..
I say it's both ways, probably a VIN break point if you look hard enough.
There has to be another explanation besides "someone stole your PCV valve".
BTW, very nice car!
Last edited by Dan_the_C5_Man; Sep 16, 2005 at 12:46 AM.