The Ultimate 2.0T PCV Fix, Anyone do this?

The Ultimate 2.0T PCV Fix

We have seen it all. There are some good fixes out there for the car, one that is famous is the Digital Hippie PCV Fix. We took the time to explore the system a little further, and finally came up with this fix as the most reliable and cost effective PCV Fix for most 2.0T FSI engines out there.

The stock PCV system is prone to failure on the pressure side. The check valve can not block boost coming from the intake, so it will allow pressure to leak in to the crankcase (valve cover area). Ultimately this leads to a reduction in boost pressure in the manifold, and decreased performance is experienced by the driver.

The theory here is that you have two parts to the pcv system

1. A normal straight pipe to pre turbo (the "back" hard pipe).
2. The new pressure side.

If you block the pressure side, you eliminate boost leaks. But at what expense? Will there be pressure in the crankcase?

We set this system up to test:

Back side has a fitting that we ran to our boost gauge. Yay, needle moves ever so slightly into vacuum, but never, ever deviates into pressure.

So how can we make this easy? The hose is 7/8" ID hose with standard hose clamps. In the PCV section, these are labeled as 3/4" caps, the fit perfectly into 7/8" ID hose for some reason, and work great for the non pressure side.

Pressure side had a concern, would it hold? Probably not. Let's explore a 3/4" - 7/8" EXPAND A PLUG that we found at Advanced Auto.


Insert the plug, and use an extension and a 13mm to press it in. Make sure the nut is loose before starting.

Then only hand tighten using the socket and extension, do not use a ratchet or excessive force, as you'll probably crack your intake.



So our car felt sluggish before doing the testing. We hit only about 16-17psi. After the fix 22-23 all day!

We would like to hear your thoughts and concerns with this mod.

That's why we did the boost gauge fitting/hookup, because if there was any sort of positive pressure, this project would have been immediately aborted. And you could use two expand a plugs, one as pictured, and the other on the crankcase side.

A vent to atmosphere setup was tested, too. Using a filter off the crank side allowed unmetered air into the intake through the rear pcv pipe.

With two, you have the $4.00 Deviant:Speed PCV fix that has no reliability issues, yay!

One of the dumbest "fixes" out there . . . .

Just get an EJ pcv fix.

Dave

yea i thought it looked stupid , i have the eurojet fix on order thanks

Is this a way of checking you have a problem with the PCV? Simply block both ends off and see if you get boost back ?

or are you guys saying dont do this at all....

I tried it for a few minutes -- it made an odd sound - like uncorking a bottle (over and over)

The car drove fine, but I wasn't comfortable with the sound.

Interesting -- but doesn't this prevent 'ventilation' if your PCV is only connected to a boost gauge and not a vacuum source?

(PS Positive Crankcase Something-or-Other...)

Looks like I might just get a new front PCV and maybe rear to

I tried it also; nad when I cold started the car it shook bad. And made a clicking sound over and over. Felt like it held boost a bit better for the two or three times I drove it but it could just be wishful thinking. So I pulled it and put my DH fix back in. Anybody wanna buy the plugs? haha. :thumbsup:

To make sure I'm following correctly, you basically plugged up the PCV system? So it will not vent? You know when pressure builds up in the crank case oil starts pushing past seals, gaskets, and piston rings correct? Can cause some serious damage, and having to replace gaskets/seals.

Dunno maybe I read incorrectly....

I'm disappointed that nobody has stopped in with 'the answers'

holly thread revival! lol doesnt this work the same way as the BSH pcv fix, block off plate and let the rear pcv vent out the blow by? and also that puttering noise described is just the rear pcv check valve, once the check valve is removed it works and sounds fine, right?

just checking, thinking about doing it, thinking about buying bsh fix, but if its the same thing why not this DeviantSpeed fix?

This looks exceedingly ghetto and there are many solutions available. I am not sure exactly how the BSH fix works in relation to this, but I can tell you it looks a lot better than tubing and hose clamps.

yeah no i know, in terms of looks bsh or any other pcv blockoff/fix looks way better of course, no doubt.

But my questions is in terms of functionality, it seems like the BSH pcv fix just blocks off the whole front pcv and lets the rear pcv vent out the blow by. And this fix also does the same thing, blocks off the front pcv and lets the rear pcv vent out the blow by.
So, all I wanted to know is that the functionality is the same, correct?

nevermind ghetto looking, cool lookig, shiny looking... functions the same. right?

Also, i think there was a similar debate over EuroJet check valve fix and DigitalHippie check valve fix. Again both fixes put a check valve in the accordian hose, both functioned the same but of course EJ looks cool, and DH looks like home made crap(which it is).

But the bottom line is, I am just curious about the fact that, both fixes function and perform the same thing, and yet people buy the expensive option, for looks? i think so, which is fine, i am all for neat and nice looking engine bays.

It is never good to add more complexity to the engine bay by adding more tubes and places for a boost/vacuum leak. As I said, I have no idea how exactly the BSH fix works in comparison to the "home-made" fix up there. I don't know if they work the same or which one is better. What I do know is the BSH fix is a plate with a hole in it. This fix involves tubes and hose clamps which are rubber and can break over time. If you want a fix that will stay fixed, I suggest the BSH solution. If you want a band-aid that increases the likelihood of something breaking over time, go with the "home-made" fix.

By putting 2 plugs, one in the PCV and one in the intake manifold, would it not work the same way as the BSH fix? To me it look like it will do the same thing and 2 plugs is not looking more ghetto than the factory tubing...