Cosmic z

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????

thekinn

iTrader: (18)

replace the hose?

rustyschopshop

Definitely replace the hose and if you don't know when the pcv was changed would do that while you are at it.

Cosmic z

I replaced the pcv but the hose seems fine unless it’s cracked somewhere I pulled the hose and made sure it wasn’t clogged it seemed fine I will check for cracks

iideadeyeii

iTrader: (6)

Bad hose x2

rustyschopshop

If the hose collapsed it is not strong enough... must replace.

Cosmic z

FIXED!!! Thanks everyone it was the hose, I don’t 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

jellofuel

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

Cosmic z

Where could I find those hoses

jellofuel

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.

Cosmic z

I meant where on the car could I locate the other two pcv hoses I’m new to the 350z

jellofuel

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.

icer5160

iTrader: (4)

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