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What PCV system do i need to go with?

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Old Jul 14, 2009 | 03:14 PM
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Default What PCV system do i need to go with?

I have a 98 z28 with a 408. the motor is not running yet but Im not sure if the stock pcv setup is doable with this big of a motor. Im assuming Im going to need a catch can right? How do the hoses need to be routed and can I use a breather?

I also have the 98 valley cover with a fast intake and NW 90mm tb.
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Old Jul 14, 2009 | 04:29 PM
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https://ls1tech.com/forums/generatio...outing-ok.html

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Old Jul 14, 2009 | 08:21 PM
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I DID!!!!

I saw that thread already i just wanted to be sure i have it right for my setup especially since i have the 98 valley cover.
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Old Jul 15, 2009 | 01:28 AM
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My main concern here is will i still be able to use my 98 valley cover and run a PCV system with a catch can? I really would rather not have to remove my intake.
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Old Jul 15, 2009 | 01:40 AM
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Yes, you can use any catch can with any valley or no valley cover. Its just hoses that do all the work.

I have no more oil entering my intake, period. All ports capped off. No catch can, nothing. Doing an experiment thats been working perfectly for 3 weeks so far.

Oil going back into the intake is just ridiculous. Can't believe that was ever designed.


.
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Old Jul 15, 2009 | 01:41 AM
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ok so based off of this picture it looks like I will be ok as long as i route it like this correct?


I just want to be sure before i go and buy everything.
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Old Jul 15, 2009 | 01:48 AM
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Originally Posted by gmmusclecarman
ok so based off of this picture it looks like I will be ok as long as i route it like this correct?


I just want to be sure before i go and buy everything.
Whats the use in buying a ctach can if your gonna still use that green hose going from the valve cover to the bellows. Oil will be going into the intake.
Run the front valve cover port inline with the other one BEFORE they both go into the PCV valve. Just have the hose that connects to the other port on the intake behind the TB.


.
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Old Jul 15, 2009 | 07:13 AM
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Originally Posted by LS6427
Yes, you can use any catch can with any valley or no valley cover. Its just hoses that do all the work.

I have no more oil entering my intake, period. All ports capped off. No catch can, nothing. Doing an experiment thats been working perfectly for 3 weeks so far.

Oil going back into the intake is just ridiculous. Can't believe that was ever designed.


.
Do you do frequent UOA?
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Old Jul 15, 2009 | 06:25 PM
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Stupid question. I got confused ever since i installed my catch can. I have a 01 z28. Which diagram would i use? The Ls6 diagram or Ls1 Diagram? Iam confused since the 01 and 02's have the ls6 intakes.
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Old Jul 15, 2009 | 07:25 PM
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Originally Posted by SheaMus
Stupid question. I got confused ever since i installed my catch can. I have a 01 z28. Which diagram would i use? The Ls6 diagram or Ls1 Diagram? Iam confused since the 01 and 02's have the ls6 intakes.
It's based on valve covers and valley cover. Which valley cover do you have?
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Old Jul 15, 2009 | 09:20 PM
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Oh i understand now. Another question why plug off the rear one on the passenger side valve cover? Why not connect the 2 in the rear to the Pcv valve and which way does the pcv valve face when connected to the catch can? Sorry for all the questions. i wanna make sure i have it rite this time

Last edited by SheaMus; Jul 15, 2009 at 09:38 PM.
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Old Jul 15, 2009 | 09:41 PM
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Originally Posted by SheaMus
Oh i understand now. Another question why plug off the rear one on the passenger side valve cover? Why not connect the 2 in the rear to the Pcv valve and which way does the pcv valve face when connected to the catch can? Sorry for all the questions. i wanna make sure i have it rite this time
You can connect the rear lines, matter of preference. The flat end of the PCV valve will always face INTO the engine crankcase.

Flat side = (Crankcase fumes in) out of the crankcase
Nipple = (Crankcase fumes out) into the intake
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Old Jul 15, 2009 | 09:42 PM
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Thank you sir
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Old Jul 18, 2009 | 10:55 PM
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Im about to start my car for the first time im going to have a problem with the pcv system. I had 98 valve covers and then got centerbolt ones but i still have the rear pcv thing on the rear of the driver valve cover. problem is that it does not fit onto the new valve covers so now i have no way of hooking up the pcv or anything.

Whats a temporary solution so i can start the engine in this situation? would it be ok to run it with out any of the holes covered up?
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Old Jul 19, 2009 | 08:55 AM
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Originally Posted by gmmusclecarman
Im about to start my car for the first time im going to have a problem with the pcv system. I had 98 valve covers and then got centerbolt ones but i still have the rear pcv thing on the rear of the driver valve cover. problem is that it does not fit onto the new valve covers so now i have no way of hooking up the pcv or anything.

Whats a temporary solution so i can start the engine in this situation? would it be ok to run it with out any of the holes covered up?
Do you have a hole or nipple on the drivers rear VC? I wouldn't start the engine with these open as it will allow for external contaminates to enter the engine.
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Old Jul 19, 2009 | 09:15 PM
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Originally Posted by 405HP_Z06
Do you do frequent UOA?
whst do you mean by this????
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Old Jul 19, 2009 | 09:20 PM
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Originally Posted by johnster
whst do you mean by this????
Used Oil Analysis
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Old Jul 21, 2009 | 10:28 AM
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Originally Posted by 405HP_Z06
Do you have a hole or nipple on the drivers rear VC? I wouldn't start the engine with these open as it will allow for external contaminates to enter the engine.
There is nothing on the rear of the driver side valve cover. I have nothing to cover it with. the old nipple from my perimeter bolt valve covers does not fit onto the new centerbolt covers.

I called the dealership to see if I could another one from them and they told me that they dont sell that part individually. I have to order a completely new drivers side pcv system in order to get the one part.

So does anyone know where exactly I can get one of these? I also need something i can temporarily cover the hole with so i can start the engine.
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Old Jul 21, 2009 | 10:16 PM
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The GM part to plug that hole on the DS valve cover is 12568011
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Old Jul 22, 2009 | 09:35 AM
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I was in a similar boat as you.

When I swapped intakes, I put on an LS6 valley cover.

Fortunately, it had a nipple blocking it off in the box...I took that and used it to cap off the back of my drivers side cover.
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