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Pcv Valve Gommet Split. Rb25det

Raven33

By Raven33,
in Engines & Forced Induction

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Raven33 Enthusiast

Raven33

Posted
Posted

Hi everyone,

I found a leak in the hose running from the PCV valve to the intake plenum, while trying to remove it to get it fixed/replaced I managed to split the grommet for the PCV valve - ended up having to remove the rocker cover to get it out.

Making a 5 minute job take almost an hour *sigh*.

So now I've got a cracked hose and no grommet for the PCV valve. I did however have one of those little air filters which by some spectacular fluke actually fits really well.

After taking the car for a drive and removing the filter I had to freeze it for 5 minutes just to get it back in.

I've read a lot of stuff about various catch can setups and seen some people have a setup that completely removes the PCV valve from the picture - and the subsequent caution of becoming pig food.

Now I know that having this little filter where it is; isn't legal - I'm not so worried about that as much as I am about this setup being less then ideal for crank case pressure - or something else that I haven't considered.

The car is running fine now, I didn't see anything wrong with oil pressure or temps - idle is smooth again and holding boost a lot better - I don't wanna do any damage just to save myself the work.

Would you run a mini air filter and block off the hose from the plenum instead of running a PCV valve/blocking it off completely?

I can get a pic of the engine bay if needed to show what I've done.

Tell me what you think peoples!

~Raven

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conan7772 Mentor

conan7772

Posted
Posted
Hi everyone,

I found a leak in the hose running from the PCV valve to the intake plenum, while trying to remove it to get it fixed/replaced I managed to split the grommet for the PCV valve - ended up having to remove the rocker cover to get it out.

Making a 5 minute job take almost an hour *sigh*.

So now I've got a cracked hose and no grommet for the PCV valve. I did however have one of those little air filters which by some spectacular fluke actually fits really well.

After taking the car for a drive and removing the filter I had to freeze it for 5 minutes just to get it back in.

I've read a lot of stuff about various catch can setups and seen some people have a setup that completely removes the PCV valve from the picture - and the subsequent caution of becoming pig food.

Now I know that having this little filter where it is; isn't legal - I'm not so worried about that as much as I am about this setup being less then ideal for crank case pressure - or something else that I haven't considered.

The car is running fine now, I didn't see anything wrong with oil pressure or temps - idle is smooth again and holding boost a lot better - I don't wanna do any damage just to save myself the work.

Would you run a mini air filter and block off the hose from the plenum instead of running a PCV valve/blocking it off completely?

I can get a pic of the engine bay if needed to show what I've done.

Tell me what you think peoples!

~Raven

I believe the PCV is the culprit for spewing oil into the plenum whilst decellerating on a hard left hand turn.

RB's are notorious for this on the track.

I had a plume of smoke after turn 1 at Eastern crk big enough to blind the car behind me, never mind the oil all over the track.

Then oil dripped out my BOV for the next 6 weeks, which is mounted underneath just after my intercooler and up hill.

Proving to me the oil came from the plenum side.

I have N1 oil pump and no ext return though.

Even for 100 % street use, the engine will still vent sufficiently through the turbo.

zoomzoom Mentor

zoomzoom

Posted
Posted
I've read a lot of stuff about various catch can setups and seen some people have a setup that completely removes the PCV valve from the picture - and the subsequent caution of becoming pig food.

Now I know that having this little filter where it is; isn't legal - I'm not so worried about that as much as I am about this setup being less then ideal for crank case pressure - or something else that I haven't considered.

In regards to the blocking of the Rocker cover to intake manifold PCV, is that illegal even if there is no venting to atmosphere?

blind_elk Grand Master

blind_elk

Posted
Posted
Would you run a mini air filter and block off the hose from the plenum instead of running a PCV valve/blocking it off completely?
You are risking pulling un-metered air - through the filter, across the rockers and down to the inlet side of the turbo - into the air/fuel mix, causing a leaner than expected A/F. And lean A/F is asking for detonation.
Raven33 Enthusiast

Raven33

Posted
  • Author
Posted
Just go to Repco and buy a new grommet. Have bought many before

Went to repco today, got another grommet - I asked them about 'S' bend hoses, they have nothing that comes even close to what I need, they did have those springs you can use to bend a straight hose without kinking it - again nothing even close to what I need, leaving nissan or wreckers (cringe).

I've put about 50k's on the car since I fitted this lil air filter and haven't noticed anything that would make me think I've been drawing in un-metered air, still worried I'm doing damage without knowing.

Zoomzoom, I'm not sure if there is a way to remove the PCV valve and connecting hose without it being illegal. Normally the idea is to vent the oily gases anywhere but into the intake - 'oil catch can' would be the key words, though if setup incorrectly can still lead to damage, defect or do nothing at all.

So I think I'll just goto the wreckers and try get another hose - might even be able to score a heat shield for my exhaust manifold.

Thanks for your input everyone.

~Raven

The Dan Grand Master

The Dan

Posted
Posted
Went to repco today, got another grommet - I asked them about 'S' bend hoses, they have nothing that comes even close to what I need, they did have those springs you can use to bend a straight hose without kinking it - again nothing even close to what I need, leaving nissan or wreckers (cringe).

I've put about 50k's on the car since I fitted this lil air filter and haven't noticed anything that would make me think I've been drawing in un-metered air, still worried I'm doing damage without knowing.

Zoomzoom, I'm not sure if there is a way to remove the PCV valve and connecting hose without it being illegal. Normally the idea is to vent the oily gases anywhere but into the intake - 'oil catch can' would be the key words, though if setup incorrectly can still lead to damage, defect or do nothing at all.

So I think I'll just goto the wreckers and try get another hose - might even be able to score a heat shield for my exhaust manifold.

Thanks for your input everyone.

~Raven

did you actually ring Nissan? or just assume it would be dear? $34.50 and in stock at the springwood store. I'd say it's a commonly sold part and $35 isn't something to cringe about

Raven33 Enthusiast

Raven33

Posted
  • Author
Posted (edited)

haha nah I was more cringing at the idea of going to a wreckers and did infact call nissan and will be going to that very store this arvo or maybe tomorrow.

edit: getting the exhaust heat shield was the bonus of going to the wreckers

Edited by Raven33
Raven33 Enthusiast

Raven33

Posted
  • Author
Posted
Forget that, already done. Ask for Craig and tell him you're a mate of mine

sweet as, you rock.

gonna have to leave it till tomorrow morning, but I'll be there for sure.

thanks man!!

~Raven

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