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2003-2009 Nissan 350Z

Yet another Valve Cover Venting Question

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Old Nov 16, 2019 | 04:31 PM
  #1  
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Default Yet another Valve Cover Venting Question

Passenger side has a small filter on the PCV valve.

Does the driver side breather on back of the the valve cover have to pull vacuum or can i just put a filter on it and seal the hole on the intake tube?

Please excuse the clutter.
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Old Nov 17, 2019 | 03:57 AM
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When I got my Admin intake, there was no port for the left side breather hose, so I have a filter on the valve cover towards the firewall. You can cap off the intake tube and use a filter to turn it into an open breathing setup. I doubt you'll pass inspection in CA since you're bypassing the PCV system.
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Old Nov 18, 2019 | 03:51 AM
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If your referring to the hose that goes from the back of the drivers side valve cover, to the intake(I think you are , just making sure) I have forgot to attach it before and went like 200 miles before even noticing and i didnt notice any difference. So yes i think just filling the hole will be alright.
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Old Nov 18, 2019 | 07:23 AM
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According to the Service Manual, the driver side valve cover pulls air from the intake tube under normal conditions and pushes vapors into the intake tube under high load conditiond.
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Old Nov 18, 2019 | 08:10 AM
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Originally Posted by karlt
According to the Service Manual, the driver side valve cover pulls air from the intake tube under normal conditions and pushes vapors into the intake tube under high load conditiond.
Cool thank you!
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Old Nov 18, 2019 | 08:10 AM
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Originally Posted by carder24
If your referring to the hose that goes from the back of the drivers side valve cover, to the intake(I think you are , just making sure) I have forgot to attach it before and went like 200 miles before even noticing and i didnt notice any difference. So yes i think just filling the hole will be alright.
Filling the hole on the intake tube and venting the nip off the valve cover! Yessir, thank you.
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Old Nov 18, 2019 | 08:11 AM
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Originally Posted by Heel Til I Die
When I got my Admin intake, there was no port for the left side breather hose, so I have a filter on the valve cover towards the firewall. You can cap off the intake tube and use a filter to turn it into an open breathing setup. I doubt you'll pass inspection in CA since you're bypassing the PCV system.
Thank you. It's a track only car so we're good
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Old Nov 18, 2019 | 12:35 PM
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If it's a track only car why not vent both to the atmosphere via filters and one or two vent tanks. If venting is too restricted then crankcase pressure may cause seals to leak.
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Old Nov 19, 2019 | 07:11 AM
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Originally Posted by 260DET
If it's a track only car why not vent both to the atmosphere via filters and one or two vent tanks. If venting is too restricted then crankcase pressure may cause seals to leak.
Both are vented to the atmosphere now, a catch can/vent tank should probably be used for cleanliness
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