thoughts on crankcase breather filters.....

[emaxxer]

I'm curious to see what advantages/disadvantages there are with either my current setup or putting filters on the intake and exhaust side of the valve cover while plugging the holes on the intake manifold and intake tube.

my current setup........









edit: I'm just tired of seeing oil in the intake that inevitably coats the intake valves. I'm not sure if this will cause a lean code because the air venting through the valve cover wouldn't be metered with breather filter mod. I know race engines use a vacuum pump and catch cans but my engine doesn't make any more power above 6000 rpm so pulling a vacuum on the crankcase wouldn't be beneficial over just venting to atmosphere (at least that's what I assume). I just don't want to have to constantly clean my throttle body from the blow by.

[1BADI5]

On an 04 you'll get a CEL quick as shit!

[iDomin07]

I drove around for a few months without anything going into it other than dirty outside air cus the hose I had was shit and it wasn't wide enough, I fixed it now but Never got a cel.

[emaxxer]

Originally Posted by 1BADI5

On an 04 you'll get a CEL quick as shit!

I bet it's because I've only seen guys use one filter instead of 2. See I'm thinking if the pcv hose on the intake manifold is still pulling vacuum from the intake side of the valve cover, it will indefinitely set a lean code because of the single air filter on the exhaust cam side of the valve cover. If there's two filters (one on both sides of the valvecover) it won't pull a vacuum on the crankcase anymore and just be vented to atmosphere. This may cure the lean code for the guys that run these filters.

[M_O_Z]

just dont fuck with it and be stupid. leave it as is. gm designed it work the way its plumbed.

[emaxxer]

Originally Posted by M_O_Z

just dont fuck with it and be stupid. leave it as is. gm designed it work the way its plumbed.

but I'm sure GM didn't design the k&n intake that I have.......

edit: and it's just my nature to fuck with things!

[victoryredzq8]

thats a good question

i'm doing away with mine altogether and using 2 breather filters, when the turbo spools it'll have boost pressure going into to crankcase, not a good thing

i did notice when i pulled my intake manifold the inside was COATED with oil, like to the point is was almost dripping out, intake ports on the head were also coated with oil as well..

i'm sure doing away with PCV can be have some harmful effects on the oil from the blow by, but i'd think if you change your oil on a regular basis it would be alright

it's a good thing i don't have emissions testing here

[jrbyers96]

I got a CEL within minutes when i first built my intake a couple years ago. I put a filter on the PCV and didnt plumb it into intake.

Needless to say, i fixed it the next day and havnt had an issue since.

I think its just of a waste of time. Some simple B12 every once in awhile and your done.

[skitz]

Originally Posted by M_O_Z

just dont fuck with it and be stupid. leave it as is. gm designed it work the way its plumbed.

Originally Posted by emaxxer

but I'm sure GM didn't design the k&n intake that I have.......

edit: and it's just my nature to fuck with things!

GM may not have directly designed the K&N intake, but K&N DID design the intake to work correctly the way GM designed the engine.

[jrbyers96]

Now on my S10 V8, i have a crankcase evacuation setup. Simple ports get welded into the header collectors and hoses run from them up to each valve cover breather.

[scoober]

well do us all a favor and post pics of your setups, because its something I'm thinking about as well!

[emaxxer]

Originally Posted by skitz

GM may not have directly designed the K&N intake, but K&N DID design the intake to work correctly the way GM designed the engine.

I have an ssk modded 3.5L K&N intake on my truck though and not the one designed for the 3.7L.

[skitz]

I'm not saying it can't be made to work in some way, I'm just saying that it was designed a specific way for a reason (and this is why aftermarket companies versions of intakes are, essentially, the same as OEM)

This doesn't seem like it would be a power-adder mod to me. Is it just a convenience mod because you think it'll make you have to clean the TB less?

[05blackcolly]

it would probably work but id rather clean the tb instead of having oil all over the motor

[victoryredzq8]

you're right forrest.. more of a convenience mod.. the "gunk" from PCV can foul plugs, coat your TB and intake manifold with oil, ect ect.. if you know someone that has a catch can setup, take a look at it and all the shit that's in it, all that "shit" gets recirculated into your intake, and it's nasty

[emaxxer]

Originally Posted by victoryredzq8

thats a good question

i'm doing away with mine altogether and using 2 breather filters, when the turbo spools it'll have boost pressure going into to crankcase, not a good thing

i did notice when i pulled my intake manifold the inside was COATED with oil, like to the point is was almost dripping out, intake ports on the head were also coated with oil as well..

i'm sure doing away with PCV can be have some harmful effects on the oil from the blow by, but i'd think if you change your oil on a regular basis it would be alright

it's a good thing i don't have emissions testing here

good thing I have a while before I need to find a shop that will just give me a pass on the visual inspection. I'm sure mine wouldn't have a problem passing one right now.......

I don't think there'd be adverse effects on the oil if you do the dual filter mod though. I would run a vacuum pump separate from the intake on my engine if it was a fully built NA race engine. I'd like to know how much vacuum my engine actually pulls on the crank case so I can see if doing this filter mod would really have any adverse effects on my NA engine. I guess I'm gonna have to get a vacuum/boost gauge a little earlier than I expected.....

[emaxxer]

Originally Posted by victoryredzq8

you're right forrest.. more of a convenience mod.. the "gunk" from PCV can foul plugs, coat your TB and intake manifold with oil, ect ect.. if you know someone that has a catch can setup, take a look at it and all the shit that's in it, all that "shit" gets recirculated into your intake, and it's nasty

yeah I wouldn't have the catch can setup to recirculate back into the intake. I don't see why I couldn't just empty out the catch can when I check/change my oil.

[05blackcolly]

yea you could. the only thing i might be worried about is insufficient venting

[scoober]

Overflow and Recovery Tanks - SummitRacing.com

[rune]

I've been thinking about this for a while. Just because I'm tired of oil draining down the intake tube, as well as all of the shit inside the intake manifold, and the dirty TB.