oil breathers

whiplash473 · May 15, 2013

rz5.0 said:
Ha thanks now i feel a lil dumber..

No worries......I'm glad I saw this thread..might have to do some double checking with my engine

Sent from bored/stroked Galaxy Nexus

hottwheels04 · May 15, 2013

Hmm now im wondering about my ?

Here's my old setup, had the passenger oil breather filter in, and I was running the hose from the side oiler filter neck to the air intake.

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But now I have it capped off with the little nippled rubber caps to cap it off and run the same filter with the intake capped off? is that correct with no hose now I run a filter?

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Addermk2 · May 15, 2013

Do you still have the PCV valve in the back of the intake? If so, toss that breather in the trash and re-attach your hose.

ttocs · May 17, 2013

I have not had a chance to mess with this since I brought it up. Was going to do it today but my usual digestive problems flaired up and now I am just hoping it calms down tomorrow. It occurred to me that a quick/easy way to check if I am getting un-metered air in through there would be just to slap a piece of tape over the breather hole and see if the idle changes as I am pretty sure its still the standard PCV valve back there. Is this a bad idea?

Steve-Oh · May 18, 2013

Breathless are bad, vacuum sucking is better

Sent from Space

ttocs · May 19, 2013

so would that idea of some tape over the hole to test it work or is it a bad idea?

Addermk2 · May 19, 2013

ttocs said:
I have not had a chance to mess with this since I brought it up. Was going to do it today but my usual digestive problems flaired up and now I am just hoping it calms down tomorrow. It occurred to me that a quick/easy way to check if I am getting un-metered air in through there would be just to slap a piece of tape over the breather hole and see if the idle changes as I am pretty sure its still the standard PCV valve back there. Is this a bad idea?

The ideal test would be to pull the PCV valve out of the hose and plug the hose that goes to the manifold.

ttocs · May 19, 2013

so run it with no valve? Why would I do that?

Addermk2 · May 19, 2013

ttocs said:
so run it with no valve? Why would I do that?

It's called a test, ya dope.

ttocs · May 28, 2013

I didn't get around to pulling out the pcv valve. Honestly I still am a little confused as what it would or would not do with out it and trust your not setting me up too grenade my motor but idunno... Its been raining and I have not been getting out at all so I finally was able to plug the breather hole and go for a ride. Idle was still high around 850-900 rpm and really didn't act any different.

blackpony · May 28, 2013

What I did was installed a pcv grommet in each valve cover, used a plastic 5/8 barb elbow and inserted one end into the grommet of each cover. Then I connected a 5/8 hose to each elbow and ran them to a catch can with a breather on th top of the can. I plan to add a small 3/8 hose from the breather filter to the tip of the air cleaner as when I'm stopped at a light, there is a slight "smoke" coming from the breather and it creeps around the hood. It is normal to has this "smoke" so I would just like to suck it in to keep it from creeping out. Has worked great on my car and many many others I have built.

ttocs · May 28, 2013

what would be the difference between a breather like that or one on the valve covers? I don't have any problem with smoking.

Addermk2 · May 30, 2013

ttocs said:
what would be the difference between a breather like that or one on the valve covers? I don't have any problem with smoking.

Again... When you put breathers on the valve covers (or even his setup) but leave the pcv valve in place... You create a unmetered air leak.

ttocs · May 30, 2013

Addermk2 said:
Again... When you put breathers on the valve covers (or even his setup) but leave the pcv valve in place... You create a unmetered air leak.

I would have thought then that plugging the whole would have resulted in a lower idle then? I didn't think the set up he described would be any different then mine netting un-metered air into the motor and was just wanting to make sure.

ProKiller · May 30, 2013

how much air are we talking here by leaving the PCV in place? is it only a problem with the idle or throughout the whole power band?

ttocs · May 30, 2013

runs solid otherwise. AFR looks good and so do all the other gauges which are aftermarket, not stock.

95opal · May 30, 2013

Its a very simple deal and cant understand why so many peeps have trouble with this. If you have the PCV valve then you dont run breathers. If you cap the pcv and oil fill vac line then you can run a breather setup. Cant mix and matchbit dont work.

ttocs · May 30, 2013

just been trying to track down the source of my high idle and thought that if un-metered air was getting in that it could be the problem. Besides that I am still learning with motors, or trying too.