couldn't find anything on this subject. my car is a 99 with the GMPP S/C and has an annoying trait it seems. it likes to push excesive amounts of oil through the breather and out on the engine bay. messy!! i had it originally hooked up with the supplied collar and inlet that comes with the kit but that produced a nice engine blown looking cloud of smoke. only does after loooong periods of boosting. i realize that boosting an engine can create excessive pressure that needs to be released in the bottom end via the breather but 2 other guys in the club have same set up as me and are only getting a slight bit of oil. i've been told a catch can works wonders but i am wondering why it is that Lenko's with the same set up and run just as hard only produces a small amount of oil whereas mine produces an over abundance?? the engine is tight as far as compression and K's aren't very high. anyone have an idea??

sounds like you got bad motor


i get 0 oil out my breather filter ive got on my 00 with the sc


i did get mass oil out of the 1 on my cav that was turbo'd , it ran good tell hit about 1500 then oil went out faster than you could put it back in , replaced motor , no more oil out the breather filter

Sounds like too much crank case pressure, there are many different causes for this.


- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.

well as i stated in my post the motor is tight and its operation is not in question. oil pressure is more then fine and comp is more then fine. only hapens at max boost for any length of time.

valve seals perhaps? just a thought..

Have a functioning PVC system?


- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.

do you mean PCV?? 2.4 doesn't run a PCV system.

It doesn't? So who installed your GM S/C kit? Cause there's a nice little baffle you shoulda installed onto the block, PCV baffle to be specific .

Positive Crankcase ventilation generally involves a mechanism that runs on a spring and is actuated by atmospheric pressure. a baffle is just that. a baffle and yes it is in there.

So if you don't consider the 2.4l to have a PCV system, what would you consider it?

its a breather system with a baffle in it. hence why that thing that's bolted onto the block is called an oil baffle. either way what it is or what its called is not the topic of discussion. everything is in place and the motor check's out operation wise. i thought there might be a slight difference in things from 99 to 00 or perhaps running the proper collar into the intake created a possible wave that stopped or slowed the loss of oil but so far no one can answer that for me. perhaps the oil level might be a factor. who knows.

sometimes if I am running in boost a lot and boosting really hard I get a little drip out of my pcv vent on my valve cover.. then again I have nothing on it...

I need to get a catch can



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purplezed wrote:do you mean PCV?? 2.4 doesn't run a PCV system.

My bad, i ment PCV not PVC, and the 2.4 most definitely has a Positive Crankcase Ventilation system. In fact it actually has 2 PCV systems, one in the intake flange of the head to positively vent crankcase pressure the intake manifold is under vacuum and the other to the s-tube to positively vent crankcase pressure when the intake manifold is not under vacuum.


- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.

here this is all the 2.4L has... you can see it on the front side of the engine, right by the alternator... the tube goes in that one side then another soft hose goes from the other out let to the 3" tube that is placed before your throttle body... so that you dont push boost into your crank case...





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there is a vacuum port in the head that supplies vacuum to the piece in the block


if your sure the motor doesnt have a piston going bad , then the problem is in the PCV system


but as i said mine doesnt spit out any oil , and ive hammered on mine and the motor has over 107,000 miles

a vaccuum port from the head you say?? wonder if that is obstructed. any idea if it can readilly be checked??

pulling the s/c off


if you look there is a black vacuum line that is connected to it

you might be able to pull it off , and see if you can blow through it

hmmm of course it couldn't be easy. thanks for the info. i'll check the vaccuum hose to see if its not quite working properly.

Hey Pat, that hose is on the bottom of the intake flange, between the 2 and 3 cylinders. Might have a dried up chunk of oil or something in it that is affecting it.

Crap, wish we would have checked that when we installed the blower

thas ok.....with copious amounts of beer, anything can be done!! i think we can unhook that hose from the TB and blow through it.

just dont give john a pitcher of strawberry margarita's , lol


let us know what you find out

i'll keep you all informed. and no Margarita's for jawn!! or cheese or beef or anything else!! one thought though........if the factory breather system relys on a source of vaccuum to work properly, and it vents back into the intake system which would also have vaccuum, by venting it out into the atmosphere as i'm doing at the moment, would that not make the original vaccuum source nul and void?? i am thinking that mebbe the supplied collar might serve more of a purpose then just routing the breather to.

it has vacuum on 1 side

and atmospher on the other side (where either you put a filter or it goes to intake pipe)


all the collar does is allow the pcv system to get filtered air , same as the smaller filter does , the only real difference is the breather filter lets vapors go out into the atmosphere , where the collar was designed to keep the system more closed so harder for the vapor to get out

or so the epa thinks

any updated?

i have a little cone filter on the end of that tube that is supposed to go b4 the throttle body and i have no oil issues.

good luck

purplezed wrote: i am thinking that mebbe the supplied collar might serve more of a purpose then just routing the breather to.

GM obviously included it in the kit for a reason.

BTW, if anyone has that collar with the PCV hose fitting from the GM S/C kit and is not using it i would love to take it off your hands.


- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.