[raffi007]

Hello everyone

i jave just purchased the new ECS Tuning Oil Catch Can but before I do i have watched several videos about other catch can installations namely Mishimoto and BMS and all they do is remove the crank vent hose that connects the Valve cover to the Intake, and install 2 new tubes that pass thru the Oil Catch Can to separate oil from the air.

When I received my ECS Tuning Oil Catch Can, I was surprised to fin in the Box and PLUG, and i didn't understand where the plug went until i went on their website and downloaded the installation manual.

In there i discovered that I have to actually unscrew the PCV Valve Cap, remove the PCV Valve from inside and replace it with the plug they have provided and they screw back the PCV Valve cap.

Is it recommended to actually remove the PCV Valve ? why are they asking to plug it ?

I have attached pictures for reference

Any help would be appreciated.

Thank you

[raffi007]

Anyone ?

[Wolf 335]

Is it an actual "plug" or just a redesigned PCV valve?

[Boland01]

I wouldn't think you would plug it. Unless it's a different PCV valve something doesn't look right.

[raffi007]

Originally Posted by Wolf 335

Is it an actual "plug" or just a redesigned PCV valve?

It is actually a plug

[TomD335xicoupe]

I assume you contacted ECS and are waiting for their explanation of use and intended results from this application? I have the BMS and do not understand why you would do that.

[raffi007]

Originally Posted by TomD335xicoupe

I assume you contacted ECS and are waiting for their explanation of use and intended results from this application? I have the BMS and do not understand why you would do that.

Yes i contacted ECS and they told me they will investigate and come back to me.
I also found it weird to actually remove the PCV Valve and cancel its operation with a plug.
I have installed the oil catch can without the plug, waiting to see why i should use it
The plug is a solid piece of aluminum and it has a sticker that says PCV plug, it has no moving parts as shown in the attached pictures

This is....weird. I get that this can is for the high pressure side, just like the BMS; just not sure why they would plug the low side.

RB's solution is to externalize the low side and add a catch can to that. If you want to eliminate gunk on the back of your valves, you do it that way and just leave the high side as is.

[DiamondGrey]

Did you ever get a reply from ECS to this?

Here's what they claim on their website:

"Our Engineers were able to get more effective results compared to the competition by routing all blow by gasses through the high-load PCV circuit to ensure the catch can is functioning under all engine operating conditions."

I'm guessing that's why they plug the low side, but not sure if it actually works.

[Sgop335]

Originally Posted by DiamondGrey

Did you ever get a reply from ECS to this?

Here's what they claim on their website:

"Our Engineers were able to get more effective results compared to the competition by routing all blow by gasses through the high-load PCV circuit to ensure the catch can is functioning under all engine operating conditions."

I'm guessing that's why they plug the low side, but not sure if it actually works.

Quite strange. The occ is functional for crankcase ventilation under boost. The pcv valve functions under vacuum conditions, idling, low acc etc. if it is plugged there should be no ventilation.

[DiamondGrey]

From what I understand, the high side outlet is connected to the air intake prior to the turbos. The vacuum in this line pulls the blow by gasses out of the crankcase during boost (the low side is shut by the PCV, since manifold is at boost pressure). This is the line that normally gets connected through the OCC. When not in boost, the gasses get vented out the low side due to manifold vacuum (PCV open), straight into the manifold.

However, when not in boost isn't the air intake still under vacuum? Therefore, couldn't the blow by gasses still get vented out the high side whether or not the low side is plugged?

The only problem I can see is that there may not be enough vacuum at low load to effectively pull the blow by gasses all the way through the OCC and maybe the flapper valve, etc. get gunked up.

[BoostinE90]

Raffi007, could you please text me please, I have a question for you. Thank you in advance. 4083862754. God bless

[khamel108]

Originally Posted by Sgop335

Quite strange. The occ is functional for crankcase ventilation under boost. The pcv valve functions under vacuum conditions, idling, low acc etc. if it is plugged there should be no ventilation.

Did ECS ever get back to you with an answer other than what is on their website?

[TOreDEFINE]

I'm looking to purchase an OCC and have been doing a lot of research. The only thing keeping the ECS product off my list for consideration is for this PCV plug. I'm bumping this thread up in hopes someone can fill in as to why this plug is needed. The other Mishimoto and BMS products don't have this plug as part of their system.

[ECSTuning]

As you guys have found on our site, our engineers were able to get more effective results compared to the competition by routing all blow by gasses through the high-load PCV circuit to ensure the catch can is functioning under all engine operating conditions. Our modification to the PCV valve changes the flow of gasses pushing any fluids into the catch can where they can be disposed of instead of having the be sucked back into your intake.

For anyone that is reading over this thread and trying to figure out what exactly is being discussed, HERE is a link to our install PDF.

[ekro30]

has anyone installed this catch can?? I sitll have my doubts about the PCV plug, under idle/cruise does the intake inlet has enough vaccum to pull the gases??

[mweisdorfer]

Originally Posted by ekro30

has anyone installed this catch can?? I sitll have my doubts about the PCV plug, under idle/cruise does the intake inlet has enough vaccum to pull the gases??

Mishimoto & BMS both make, great & proven catch cans

[ekro30]

Originally Posted by mweisdorfer

Mishimoto & BMS both make, great & proven catch cans

yes Im aware of both, I was looking to save some bucks with the ECS one instead of the RB/Mishimoto and BMS cans.

[Speedy_12139]

Originally Posted by ekro30

yes Im aware of both, I was looking to save some bucks with the ECS one instead of the RB/Mishimoto and BMS cans.

Buy once, cry once.

[mweisdorfer]

Originally Posted by ekro30

yes Im aware of both, I was looking to save some bucks with the ECS one instead of the RB/Mishimoto and BMS cans.

I bought my mishimoto catch can on Amazon.

https://www.amazon.com/Mishimoto-MMB.../dp/B010CGCQQC

[Kipitrl]

I know this is an old thread but ive been running the ecs tuning OCC for over a year now, it works great no issues.
FBO 24 psi 100% methanol

[arkie6]

I have effectively the same setup; although, mine is different in the fact that I blocked the low pressure side of the PCV system with set screws in the ports in the head (I did this when I changed my valve cover gasket and had the intake off to clean the carbon buildup). At the same time I also removed the high pressure side PCV flapper valve and accordion hose and replaced that with a straight 3/4" rubber hose routed through a catch can before going to the rear turbo inlet pipe. I've been running this setup for the past 18 months without issue.

So what is the purpose for the low pressure side PCV system on the N54? Is there an actual technical reason for it or is it just EPA mandated? I have an old Ford pickup where the PCV hose is just routed to the outer part of the air filter housing with a coarse mesh filter on the end of the hose. It isn't under vacuum. I can see where the vacuum side PCV system might reduce engine oil leaks by keeping the crankcase under vacuum at low load, but in my case I haven't see any change in oil leaks (still have a minor weep from the oil pan gasket, but I had the same weep prior to the change to the PCV system).