PCV How to: W/pics. Round 2
 

There has been some talk lately about how to set up your pcv system, as you already know it cant be left "stock" and just running a line from your stock pcv to your turbo inlet just doesnt cut it. If done either of these ways your crankcase will be pressurized either in boost if left stock (very bad), or in vaccum if just ran to turbo (bad). I believe this is also the cause of many "my turbo/motor is blown" threads because your car is smoking like chief sitting bull with his peace pipe.


This is what I used you can use different sized hose if you like.

I got most of this at Advance Auto Parts, but any part store will do, you might have to dig a little for some good pcv valves.

1. 3/8in. fuel line hose, I bought 6 ft but you will only use 4-5. $1.50 ft.
2. 2 PCV valves puralator PN#PV1029 (these are good ones and will not leak boost) $4.00 a peice
3. 12 3/8in. hose clamps (I got a few extra) $5.00
4. 1 3/8 threaded hose fitting $1.00
5. 2 3/8 plastiv "T" vacuum fittings $1.00 a piece
6. 1 Home depot oil catch can, (air compressor filter) and 2 more 3/8 hose fittings $15.00

That should do it for a total of around $30.

Step 1.
Take your old pcv valve and hose to the manifold, you can throw out the old hose since you wont be needing it. If you have the stock valve still the elbow should come off the top, pull it off, if not you can cut the elbow off.
Attachment 32125

Step 2.
Open up your pcv valve and take out the inner slide and spring, you can toss the slide and spring also, all you need is the valve body. Put this back together
Attachment 32126

Step 3. (optional)
I drilled the holes in the top and the bottom of the valve body bigger for some better vacuum action.
Attachment 32127

Step 4.
Now your "gutted" stock pcv valve is finished, set it aside for now and find a place for your 3/8in hose fitting to go into the intake of the turbocharger. I put mine in the end of my cone filter, this is a good spot, if you dont have a filter you should look into investing in one, it will make your turbo and motor happy.
Attachment 32128

Step 5.
I used one of my "T" fittings right off of my intake manifold, one side is going to my BOV and boost guage, if you dont have anything else using this vacuum sorce you dont need a "T". The hose connected to the otherside of the "T" needs to be assembled in this order. First it goes to one of your new PCV valves, the direction of airflow through this valve should be going towards the intake manifold. I have another length of hose connected to it, and from there it goes to the other plastic "T" fitting. Use clamps on all fittings, since it could leak vacuum/boost.
Attachment 32129

Step 6.
From this "T" one line will go derectly to your gutted stock valve placed in its "stock" position.
Attachment 32130

Step 7.
The other side of the remaining "T" goes to your Home Depot catch can, the catch can can also be placed in line between your gutted stock pcv and the "T" from step 6. After the catch can I placed my second "new" pcv valve. its direction of airflow should be aiming towards the air filter, so when your boosting the intake of the turbo will vent the crankcase.
Attachment 32131

put the filter back on the turbo and you should be ready for some rippers, Now your crancase will be in vacuum if you are in boost or vac. If your car is burning oil I advise you to try this first since it is cheeper than going out and buying a new turbo or motor.

Here is a pic of the final product.
Attachment 32132

If any of the pictures are unclear or you have any questions you need to go back to school because its really simple, I think a gay monkey could figure it out.

Re: PCV How to: W/pics. Round 2
 

Thanks i didn't feel like going behind the block to get this done. Good write-up

Re: PCV How to: W/pics. Round 2
 

i had plans of doing the exact same thing. im glad to know it works w/o me putting out the effort 1st

Re: PCV How to: W/pics. Round 2
 

So pretty much if you have a turbo, PCV valve is sort of a must?

Re: PCV How to: W/pics. Round 2
 

Some just vent it from the back of the block to the ground, I hear it also works, just makes me feel better doing a setup like this. If you have a turbo you have to do somthing, you cant just leave it stock.

Re: PCV How to: W/pics. Round 2
 

sounds good. this is a very helpful writeup that i will be using soon

Re: PCV How to: W/pics. Round 2
 

Yes very helpfull indeed. i was going to be looking for info on this in a couple weeks anyway...

Re: PCV How to: W/pics. Round 2
 

Were you saying that it was bad to have vacuum in the crankcase?

Re: PCV How to: W/pics. Round 2
 

Why did you post this crap up again?

Why would you want inconsistent blow-by vapors going back into your motor and messing up the A/F ratio?

Why would do this much work for worse results?



SIMPLE SOLUTION: VENT THE VALVE COVER AND THE STOCK CATCHCAN TO THE GROUND

Re: PCV How to: W/pics. Round 2
 

Hey I was asked to put it back up so stop being a ------.

Re: PCV How to: W/pics. Round 2
 

Check out this HMT Catchcan
Attachment 32098
A little creativity and a lot of Rockstar

Re: PCV How to: W/pics. Round 2
 

brandon... you truly are a ------!!!! Car pulls good, had fun beatin down on it tonight!!!LOL. Time to turn up the boost... ------....

BTW... Catch can is funny as ----!!!!!

Fix the image..------

Re: PCV How to: W/pics. Round 2
 

that rockstar catch can is hilarious. :D

Re: PCV How to: W/pics. Round 2
 

Very good post cheers :y

Re: PCV How to: W/pics. Round 2
 

Good post,been thinking about doing this.Definately need to figure out someway to vent crankcase.Was thinking about the HM catch can.Already done it on my B18

Re: PCV How to: W/pics. Round 2
 

cool write up...
how come there is a check valve between the turbo's intake and the compressor filter? as far as I can tell the filter would stop the oil from dripping down into the turbos intake...

edit:
thought about it for a minute and realized if that check valve wasnt there, there would be an intake manifold vaccume leak... having 2 check valves forces the filter to use which ever vaccume is currently greater. 8)

(ps i bought all the parts today... how come my homedepot charges $26 for that same compressor line filter!! lol)

Re: PCV How to: W/pics. Round 2
 

Its good to see that someone is finding this writeup usefull. So far on my fresh build I just pulled out the pcv valve and pointed the tube down, and put a filter on the V/C, I'm going to build another one of these pcv setups and determine once and for all if "pcv setup">"just point the tube down"

Re: PCV How to: W/pics. Round 2
 

well, my car smokes like something that burns a lot of oil... its bad.... and right now i am running with the stock hose pulled off the PCV black box on the back of the block and NO pressure comes out of it when i rev up the engine. (of course the IM is plugged)

i am not convinced that it vents enough to relieve the pressure in the engine. i got my check valves for the PCV setup, so im gonna install this rig and ill post up the changes if there are any

Re: PCV How to: W/pics. Round 2
 

how the hell did you get the stock pcv valve apart?

Re: PCV How to: W/pics. Round 2
 

it was 2 pieces, pulled apart pretty easy, you might have to go to an auto parts store and get a replacement, the black top one in the pic was the stocker or was on there when I bought it anyway, and the blue one I got at autozone, I think they're only like 2 or 3 bux

Re: PCV How to: W/pics. Round 2
 

have you ever actually checked if theres any vaccum at the line going to your filter? i made a few like that and there was pretty much nothing. im sure your catchcan will still get junk in it but i dont know..

Re: PCV How to: W/pics. Round 2
 

alright well ive installed the rig... my car still smokes pretty bad, so i think i blew out the oil rings.. who knows.

there is a very strong vaccume at idle... its hard to say how much vac there is during boost.. maybe if i have some time i can T it and check with my boost gauge?

i think the system would work just as well without the air line filter... ive seen many many stock turbos with more than a bit of oil in the intake... plus that ------ thing cost me $26, im gonna return it hahaha

Re: PCV How to: W/pics. Round 2
 

well sorry to hear it didnt work foryou, danz btw are you using an oil restrictor before you're turbo? this could also cause some smoking. I would suggest you pick up a compression tester and see what it tells you.

Yes I did, on that setup i was getting like 1-2 in. hg of vac in that line, which from what I've read is plenty and its def. better than none or even a positive pressure. From what i've found any more than 15 or so in. hg and you start sucking a ton of oil out with the vac.

Re: PCV How to: W/pics. Round 2
 

stock systyem your car sucks like 20 in hg at idle through your pcv, might as well vent it then do all that bullshit for 1-2 in hg

Re: PCV How to: W/pics. Round 2
 

I would agree if it hadnt worked so well for me

Re: PCV How to: W/pics. Round 2
 

well after running this setup i found some things that didnt work at all.. and things you need to do for it to work better

what was happening was during boost there was not enough suction to suck the oil into the catch can... it would build up in the stock black box and when you let off and go into vac it sucks it all through your enigine

the oil vapors lower the octane content of your fuel as well

if you want any suction from your turbo intake you need to install a slash cut breather, which is basicly a tube with a 45 degree angle cut at the end (instead of flat) and the hole needs to face the opposite direction of the flow of air. that will create some vaccume

from my readings i have decided to go with an open vent system similar to the T1 breather. except ghetto style.. line off VC into vented can, line from stock black box to vented can (at bottom of catch can to serve as a drain under non-pressurized circumstances)

Re: PCV How to: W/pics. Round 2
 

Finally someone listens.

Smart move. Oil/fuel blow-by vapor doesn't do an engine any good.

Re: PCV How to: W/pics. Round 2
 

as long as its not going through in boost its all i'm looking for, once I go into vac I can live with a little puff, I'm running it open right now also but will be going back to this setup. I'm getting plenty of vac in my pre turbo durring boost but maybe because i'm running a pretty big turbo and a pretty decent amount of boost.

Re: PCV How to: W/pics. Round 2
 

I have blue pcv valve, i cut it but i cant pull it apart to get the spring out. any hints how?

Re: PCV How to: W/pics. Round 2
 

Use a drill, I donno, its not even that big of a deal that you get it out.

Re: PCV How to: W/pics. Round 2
 

the center thing is metal.

Re: PCV How to: W/pics. Round 2
 

yeah thats just a thin little plate that the spring pushes on, I think I used a channel-Lock's and a bench vise to get mine to split in 2 not to tight that you crush it.

Re: PCV How to: W/pics. Round 2
 

Some race cars run the crankcase vent to the exhaust and when done properly it actually creates a vacuum, might mess with an 02 sensor though

Re: PCV How to: W/pics. Round 2
 

Yeah ive seen that too and supposedly it works great. I wouldnt re route the pcv back into the intake on a boosted car, it severely lowers the octane rating of the air/fuel coming into the engine and makes detonation more likely. h

Re: PCV How to: W/pics. Round 2
 

Thats why I took a empty quart of oil, cut three holes; two on the side, one on the top, shoved a nice k&n into the top, and the hose from my pcv into one hole, and the one from my crank case in the other, shove it right next to the battery, hood just fits... Quart of oil catch can, change every 3000 miles or with oil change, FTMFW. :6

Re: PCV How to: W/pics. Round 2
 

lol i was looking at an empty quart the other day and thinking the same thing. I think somebody on here already did that and posted pics though... cant remember

Re: PCV How to: W/pics. Round 2
 

Heh, I used Gatorade 20oz bottles. I tried soda bottles first but the clear plastic walls are too thin to tap with the brass fittings. Gatorade bottles work nicely. I put 1 fitting in the cap with the filter and another fitting just under where the cap screws in on the side for the hose. It works I guess, I just didn't put any baffling in it.

Re: PCV How to: W/pics. Round 2
 

No brass fittings on mine. :1