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2003-2009 Nissan 350Z

Pcv valve help!!!!!!!

Old 07-05-2019, 10:39 AM
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Cosmic z
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Default Pcv valve help!!!!!!!

So I was driving yesterday on the 4th and I noticed a whining noise I stopped to check what it was I started listening around in the motor and noticed my pcv valve hose was collapsed (sucked shut) I assumed it was a bad pcv valve, but I was wrong. After replacing the pcv it immediately started doing the same thing! Does anyone know how I can fix this????
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Old 07-05-2019, 11:29 AM
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thekinn
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replace the hose?
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Old 07-05-2019, 11:44 AM
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rustyschopshop
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Definitely replace the hose and if you don't know when the pcv was changed would do that while you are at it.
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Old 07-05-2019, 11:59 AM
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I replaced the pcv but the hose seems fine unless itís cracked somewhere I pulled the hose and made sure it wasnít clogged it seemed fine I will check for cracks
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Old 07-05-2019, 12:03 PM
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Originally Posted by thekinn View Post
replace the hose?
Bad hose x2
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Old 07-05-2019, 12:46 PM
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If the hose collapsed it is not strong enough... must replace.
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Old 07-05-2019, 04:16 PM
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FIXED!!! Thanks everyone it was the hose, I donít know who put the hose on it that was on there but it was way to loose and caused it to collapse, replaced it with a much stronger hose and works great now! Thanks

-cosmic z
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Old 07-05-2019, 05:08 PM
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I would inspect the other two pcv hoses just to see what condition they're in. Z1 silicone is good stuff as well, I have Z1 silicone everything. https://www.z1motorsports.com/z1-pro...it-p-4284.html
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Old 07-05-2019, 06:06 PM
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Where could I find those hoses
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Old 07-05-2019, 06:33 PM
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Originally Posted by Cosmic z View Post
Where could I find those hoses
All Z1's silicone hoses are here - https://www.z1motorsports.com/perfor...-c-6_1022.html

You can buy some hoses individually, I found it was easier to just replace all of them.
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Old 07-05-2019, 06:36 PM
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I meant where on the car could I locate the other two pcv hoses Iím new to the 350z
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Old 07-05-2019, 07:06 PM
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Originally Posted by Cosmic z View Post
I meant where on the car could I locate the other two pcv hoses Iím new to the 350z
No problem! The first link has a diagram showing where all three are. There's one at the front of the engine, you can see it connecting the two valve covers. The other one is behind / underneath the intake. It plugs into the bottom of the intake, and into the back of the valve cover.
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Old 07-09-2019, 06:41 PM
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Don't use silicone hoses for the PCV system. They will sweat. They also get very flexible once they warm up, that collapsing issue you just experienced will happen again. I tried some Mishimoto silicone hose for a mini catch can I setup on the PCV system. Advertised as being good for this type of use. I even emailed their customer support to confirm. It was complete garbage, the hoses just collapsed under vacuum and got a thin layer of oil/grease on them from sweating. I personally would only recommend silicone hoses for intake plumbing joints and the cooling system. Keep it away from anything that comes into contact with petroleum products (oil/gas).
-Icer
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