I was wondering, when i was installing my intake, they said to hook it up the pipe to the valve breather. I noticed that when i removed my old air intake, there was some oil around the tip. But, i installed the air intake anyway and its good install. I was looking at the install and was wondering how does the valve breather work and should i get a valve breather with a filter or is it better to keep with intake, b\c the intake is up over the breather and the oil would have to work against gravity to get the the intake. Thanks.
97 Chevy Cavalier
2.2L 3 spd
Automatic
the breather sends unused oil particles back through the system. it doesn't really matter which way you go with it. i've heard people say that you'll gas mileage will be slightly better if you connect it to the intake with a hose, but i just put a breather filter on mine and i still get 30+mpg plus my inside of my intake doesn't get as dirty as fast.
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i heard or from what i understood, that under WOT the little valve spits out a but of oil and throws it back into the throttle bottle to burn the oil, thus making the car combust faster, or something of that matter. the only reason why i am saying this(and please dont flame me), is because my brother has a 95 auto SHO and his works the exact same way, reroute some of the oil back into the engine and causes it to burn and combust faster. my brother had to carry spare 10w-30 cause his car was burning alot of oil whenever he amshed on the gas and WOT-part. if anyone knows please correct me. im still a newb when it comes to the mechanics
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fst_99Z24 wrote:i heard or from what i understood, that under WOT the little valve spits out a but of oil and throws it back into the throttle bottle to burn the oil, thus making the car combust faster, or something of that matter. the only reason why i am saying this(and please dont flame me), is because my brother has a 95 auto SHO and his works the exact same way, reroute some of the oil back into the engine and causes it to burn and combust faster. my brother had to carry spare 10w-30 cause his car was burning alot of oil whenever he amshed on the gas and WOT-part. if anyone knows please correct me. im still a newb when it comes to the mechanics
If that was the case, every car that is equiped with a PCV would have to add oil all the time.
The reason it is there is to let excess oil out of the crank case. The reason they recommend connecting it to the intake is so it will get burned off instead off just shooting out all over the engine bay and creating a huge mess.
well if u use the breather, where do u put the hose?
if you use the breather, you basically close up the hole on the intake pipe. take the hose off and cover up the hole. its easy as that
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And just to clarify....
The "breather" on the valve cover is the air INTAKE for the PCV system
The PCV valve is the air EXHAUST of the system.
The hose connects to your air intake because it is drawing air IN to the engine,
not blowing air (and oil residue) out. That is the function of the PCV valve.
However, because it is an open hole to an oily place, there will be some residual
oil residue that can, and usually does, find it's way into the air intake. This is normal,
unless there is A LOT of residue, or your air intake pipe is wet with oil. Then you have
a problem with the Positive Crankcase Ventilation system.
-Ferrite
For those people concern with their PCV valve, 2 things you must understand.
1) DO NOT seal it off, or many bad things will happen, Such as blowing your valve cover gasket, as a minumium thing that can happen, at most, you can destroy your engine.
2) Its your choice as to have it either covered with a breather filter or connect to your intake.
I have tried it both ways. However i rather clean my Intake once every 6 months or so, then buy a $9.99 USD filter for the valve cover nipple.
You dont even need a filter. Because air only goes one way through it. Putting a filter on top of your PCV valve just makes it dirty, eventually clogs it and gives you problems.
Might as well connect it to a catch can with a vent hole. It will work just as well.
For simplicity, i choose to go back to connecting it to my intake, As seen in the pic below.
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remmeber, the LD9's = no pcv valve.. just a box
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ok so i have a 00 2200 with an ebay intake, i'm in the process of drilling the intake to put the IAT in the pipe, and now do i take the hose from the pcv that currently goes into the black 2200sfi box and move it to the intake tube?? or can i just leave it alone? or can i take off the black box??
