hey my cars leaking oil from the breather filter on the head, can anyone tell me why and what should i do
AIm s.n is mike banx

 

Put the stock PCV system back on. That pressure is pushing oil all over the motor where it shouldn't be, and it might be burning some. PCV good.

 

How much oil is coming out? There should be some oil vapor coming out or else the breather isn't doing what it's supposed to.

 

Is there a lot of oil being thrown on the breather? Ok, well lets get to the basics.. What's the year, make and model. Alos engine, wheter internall stock or not. Forced induction, or not...... Becasue, from my experience a lot of oil out of a breather is a sign of excessive blow-by. NOT GOOD!

 

where u put the breather filter on?? the pcv valve or the crankcase vent hole, if it's the crankcase vent and u got oil coming out...u blow ur piston ring...i hv the same problem b4 and need to change the piston ring.....becareful

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by frozenb &raquo;</TD></TR><TR><TD CLASS="quote">where u put the breather filter on?? the pcv valve or the crankcase vent hole, if it's the crankcase vent and u got oil coming out...u blow ur piston ring...i hv the same problem b4 and need to change the piston ring.....becareful</TD></TR></TABLE>

I don't think the breather filter caused you to blow your piston ring though.

 

the motor is a ls vtec
type R head spoon pistons and ls block
it leaks oil out of the filter, not just vapor but liquid. the more i beat it the more it comes out.Is the pcv the rubber tube that connects to it and goes to the intake

 

put the tube that goes from the intake to the head back on...air is supposed to blow from the intake to the head, through the pcv system and back into the intake manifold.

i dont understand why everyone puts a filter on the valvecover....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastcrxsi90 &raquo;</TD></TR><TR><TD CLASS="quote">put the tube that goes from the intake to the head back on...air is supposed to blow from the intake to the head, through the pcv system and back into the intake manifold.

i dont understand why everyone puts a filter on the valvecover....</TD></TR></TABLE>


Because oil in your intake will lower the useful octane rating of your gasoline and increase the chance of detonation. The breather will will allow the head to suck air from open atmosphere when under vacuum and will allow oil blow by to escape when under pressure.

 

Breather = no ventilation to the crankcase. There is no suction under intake vacuum in the crankcase.

Breather is bad.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StyleTEG &raquo;</TD></TR><TR><TD CLASS="quote">Breather = no ventilation to the crankcase. There is no suction under intake vacuum in the crankcase.

Breather is bad.</TD></TR></TABLE>

Wrong. Here is some reading for you.

https://honda-tech.com/zerothread?id=697498

 

That was done with an intake hose attached, not with a breather.

It does not apply.

I have done tests as well. At idle, with a breather filter, there is positive pressure not negative.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">

Wrong. Here is some reading for you.

https://honda-tech.com/zerothread?id=697498</TD></TR></TABLE>

from your link:


air flows from intake tube to the valvecover...just like in the pic.

look at the slash cut tube that goes into the stock honda intake tubing...the slash is pointed away from the throttlebody so that the air flows through the tube into the valvecover.

if you just put a filter on the valvecover then you are only getting suction through the pcv were it hooks into the intake manifold...there will not be anything blowing into the valvecover to help with this. its almost like having half the vacuum on your pcv system. note were your picture says fresh air.

and no i didnt bother reading more than the first bit of the thread...ill read it when i have the time...but i dont think my opinion will change.

 

You have to read the rest of the thread *******.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dasher &raquo;</TD></TR><TR><TD CLASS="quote">-Using a valve cover breather did not impeed the breathing ability of the valve cover or change the results. </TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">You have to read the rest of the thread *******.</TD></TR></TABLE>

*******? Grow up son.

Go hook up a vacuum gauge to the valve cover with it disconnected from the airbox.
There is positive pressure at idle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StyleTEG &raquo;</TD></TR><TR><TD CLASS="quote">

*******? Grow up son.

Go hook up a vacuum gauge to the valve cover with it disconnected from the airbox.
There is positive pressure at idle.

</TD></TR></TABLE>

There's only positive pressure under load.

 

what he said. all the way.

from a honda dealership tech standpoint, i think this "valve cover K&N filter" is nonsense. if the people who use these filters knew how the honda PCV system works, they would pull the filter off immediately and convert back to stock.

i am not gonna go into big time details, because that's what the internet is for. but just know this.. the pcv system needs some sort of suction to help the "crankcase ventilation" process, which is why honda routed the valve cover into the air duct. without this, the pcv is nowhere near as effective as it should be.

wanna fix your problem? get a new pcv valve, preferrably a honda one. make sure all your pcv hoses are routed properly, and THROW the valve cover filter in the trash ASAP!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">There's only positive pressure under load.</TD></TR></TABLE>

Only when the stock breather hose is hooked up.

Do the test for yourself, instead of blinding following what one person on Hondatech said they saw.

Hell you can probably feel the positive pressure even with out a vacuum gauge. Just put your hand near the breather nipple on the valve cover with out a hose/filter on it.

 

from my experience, working on hondas on my own since 96, and officially since 98, i can easily say that those breather filters are crap. as a dealership tech, i see a lot of ****, ranging from 100% OEM stuff to completely modified.
trust me on this, the breather filter is CRAP. don't make me get my shop foreman on here to prove you wrong. he is hands down, the most knowledgable honda tech i have EVER met. platinum honda certified, ASE 1-8, etc, you name it, he's got it. wrenching on hondas since 1988, AND he is into performance, so he's not one of those "by the book" dealer technicians. he knows all aspects.

tell you what... monday i will ask him for his insight on this subject. i'll post it that morning.
heh, knowing him, he'll remember a service bulletin regarding this subject from like 10 years ago and show it to me.

anyway, we'll see.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StyleTEG &raquo;</TD></TR><TR><TD CLASS="quote">

Only when the stock breather hose is hooked up.

Do the test for yourself, instead of blinding following what one person on Hondatech said they saw.

Hell you can probably feel the positive pressure even with out a vacuum gauge. Just put your hand near the breather nipple on the valve cover with out a hose/filter on it.

</TD></TR></TABLE>

He got the same results when having the guage hooked up to the intake as normal and when it was hooked up to a breather filter. He posted the numbers. Are you trying to say that he is just making them up? Dasher is a credible member of this site. Lets see your test results.

V8 guys have been using breathers forever as well.

 

He did one test, on one car, and found his results.

I did one test, on my car, and found different results.

Instead of sitting on the keyboard and just regurgitating what other people say/claim, do your own test. It takes less than five minutes to do.

 

If you've got pressure at idle you most likely have a clogged PCV. I have a test for you try, pinch your PCV line that runs to the intake manifold and see if you here a clicking. If you don't, you're PCV is clogged.

 

tested three other tegs today, two of them we just replaced the PCV. All of them have positive pressure with out the intake line at idle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StyleTEG &raquo;</TD></TR><TR><TD CLASS="quote">
Only when the stock breather hose is hooked up.
</TD></TR></TABLE>

you are correct, when no hose is connected, it doesn't work the same way. i never seen anything other than air come out from my valve cover.. oh.. and i don't run a filter.. just open breather valve. this is b series.. i don't konw if this applies to all honda motors.

btw, problems people are having are possibly due to filter which cloggs up at some point, but i don't see anything wrong with stock setup unless you can't run stock setup due to turbo