PCV mod question
PCV mod question I've performed the mod detailed here:
http://www.ls1howto.com/index.php?article=18
My question is: after the modification, the driver's side head cover is completely sealed off. On the passenger's side, the rearward vent tube is plugged. So why is the forward vent tube still used?
See the image here for details:
http://www.ls1howto.com/howto/geniii...kpcvsystem.jpg
Thanks,
-ch
http://www.ls1howto.com/index.php?article=18
My question is: after the modification, the driver's side head cover is completely sealed off. On the passenger's side, the rearward vent tube is plugged. So why is the forward vent tube still used?
See the image here for details:
http://www.ls1howto.com/howto/geniii...kpcvsystem.jpg
Thanks,
-ch
Originally Posted by oange ss
tube going to the t-body is an oil breather line
-ch
This is very helpful, but I'm not sure I've got it clear. So you only need one breather between the two valve covers, right? So why were there two breather tubes on the passenger-side cover, with one of them Y'ed into the PCV line?
I do appreciate the help,
-ch
I do appreciate the help,
-ch
Originally Posted by oange ss
both were being used in the pcv system
-ch
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is the purpose of the PCV system to relieve positive pressure, or to circulate and move the gases that collect?
what would happen if you disconnected all the lines and just put a breather on both valve covers?
what about doing that and leaving the line from tht TB to the valve cover, when the rpms get high would there be enough air flow to push air through that hose and actually put some fresh air into the valve cover, would this be ok?
I want to find some way to get rid of the intake oiler system.
what would happen if you disconnected all the lines and just put a breather on both valve covers?
what about doing that and leaving the line from tht TB to the valve cover, when the rpms get high would there be enough air flow to push air through that hose and actually put some fresh air into the valve cover, would this be ok?
I want to find some way to get rid of the intake oiler system.
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Originally Posted by BigSteele
is the purpose of the PCV system to relieve positive pressure, or to circulate and move the gases that collect?
what would happen if you disconnected all the lines and just put a breather on both valve covers?
what about doing that and leaving the line from tht TB to the valve cover, when the rpms get high would there be enough air flow to push air through that hose and actually put some fresh air into the valve cover, would this be ok?
I want to find some way to get rid of the intake oiler system.
what would happen if you disconnected all the lines and just put a breather on both valve covers?
what about doing that and leaving the line from tht TB to the valve cover, when the rpms get high would there be enough air flow to push air through that hose and actually put some fresh air into the valve cover, would this be ok?
I want to find some way to get rid of the intake oiler system.
-ch
TECH Addict
Joined: Feb 2004
Posts: 2,826
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Originally Posted by hyperion
Or how about this: how does the crankcase pressure get into the top of the head on the driver's side, but not the passenger's side? I'd love a comple explanation of what's going on there...
-ch
-ch
Originally Posted by Another_User
The point behind the PCV system is not to evenly suck out the blowby gasses. The point is to create a vacuum in the crankcase and give the gasses someplace to go. If you have too much blowby for your PCV system to handle, then it is probably time for new rings.
-ch
TECH Apprentice
Joined: Jan 2002
Posts: 364
Likes: 0
From: Princeton, IN
The pcv needs to be caped off after going to the ls6 cover... only use the one on the valley cover...
The other line on the passenger side cover is not under a vacuum... it's on the air intake side... its place is to pull fresh air in to the crank case...
No oil will come in from that line "the one that runs from the passenger cover to the TB…" cap both breather tubs of the old pcv... rear passenger side and rear driver side.
If you still have problems with it I can take a picture of my system as an example
with this picture cap everything other then the red line to the TB
http://www.ls1howto.com/howto/geniii...kpcvsystem.jpg
The other line on the passenger side cover is not under a vacuum... it's on the air intake side... its place is to pull fresh air in to the crank case...
No oil will come in from that line "the one that runs from the passenger cover to the TB…" cap both breather tubs of the old pcv... rear passenger side and rear driver side.
If you still have problems with it I can take a picture of my system as an example
with this picture cap everything other then the red line to the TB
http://www.ls1howto.com/howto/geniii...kpcvsystem.jpg
Last edited by dissonance; Apr 6, 2005 at 10:22 PM.
Originally Posted by dissonance
The pcv needs to be caped off after going to the ls6 cover... only use the one on the valley cover...
The other line on the passenger side cover is not under a vacuum... it's on the air intake side... its place is to pull fresh air in to the crank case...
No oil will come in from that line "the one that runs from the passenger cover to the TB…" cap both breather tubs of the old pcv... rear passenger side and rear driver side.
If you still have problems with it I can take a picture of my system as an example
with this picture cap everything other then the red line to the TB
http://www.ls1howto.com/howto/geniii...kpcvsystem.jpg
The other line on the passenger side cover is not under a vacuum... it's on the air intake side... its place is to pull fresh air in to the crank case...
No oil will come in from that line "the one that runs from the passenger cover to the TB…" cap both breather tubs of the old pcv... rear passenger side and rear driver side.
If you still have problems with it I can take a picture of my system as an example
with this picture cap everything other then the red line to the TB
http://www.ls1howto.com/howto/geniii...kpcvsystem.jpg
1) How does the crankcase pressure get up to the driver's side head? I can see how it works with the LS6 valley cover, but not the original LS1 way.
2) The forward tube on the passenger side is an air *intake*, not a vent tube? How does that work? When is there vacuum inside the valve cover?
I feel even more confused!
-ch
12 Second Club
Joined: Aug 2003
Posts: 270
Likes: 0
From: Chicago IL
First off let me appologize for not using correct deffenitions.
The pressure in the valve covers should be the same as the pressure in the oil pan. There is an open connection between the two through the oil drain journals. Which is how oil poured into your valve covers gets to your oil pan.
Originally Posted by hyperion
1) How does the crankcase pressure get up to the driver's side head? I can see how it works with the LS6 valley cover, but not the original LS1 way.
maybe a dumb idea but what about trying to use the AIR pump to periodically pump air into the system (into one valve cover?) and have a breather on a opposite end, wouldnt this take care of "flushing" out the gases .
So if you eliminate the PCV system what are the bad side effects
So if you eliminate the PCV system what are the bad side effects
Originally Posted by SapphireHawk
First off let me appologize for not using correct deffenitions.
The pressure in the valve covers should be the same as the pressure in the oil pan. There is an open connection between the two through the oil drain journals. Which is how oil poured into your valve covers gets to your oil pan.
The pressure in the valve covers should be the same as the pressure in the oil pan. There is an open connection between the two through the oil drain journals. Which is how oil poured into your valve covers gets to your oil pan.
So now when you go to the LS6 PCV solution, you use neither the large metal baffle on the driver's side valve cover, nor the plastic baffle on the rearward of the passenger's side valve cover. But why were both of these used in the original LS1 solution? Wouldn't one or the other work fine to vent the crankcase pressure?
Thanks for helping me understand this,
-ch
TECH Addict
Joined: Feb 2004
Posts: 2,826
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Originally Posted by BigSteele
maybe a dumb idea but what about trying to use the AIR pump to periodically pump air into the system (into one valve cover?) and have a breather on a opposite end, wouldnt this take care of "flushing" out the gases .
So if you eliminate the PCV system what are the bad side effects
So if you eliminate the PCV system what are the bad side effects