Vented AEB valve cover

[Avant Nate]

I was just wondering for anyone who has vented their AEB valve cover, did you install some kind of baffle? I know the AWM has a plastic baffle from the factory, but I was thinking a welding in a little aluminum plate.

[VanCityA4Q]

Why do you want to vent it? Just out of curiosity.


Sent from my iPhone using Tapatalk

[Wrath And Tears]

He's got a pretty high horsepower setup, so venting the valve cover helps relieve the pressure from the pcv system (I do believe). Most people swap to the AWM valve cover, or weld a bung in the AEB cover.

[redline380]

You vent to relieve pressure that can build up in the head. If guides, seats, and seals are worn out, gasses can back up into the head. High horsepower really doesn't have too much to do with it.

Just get an AWM cover with a port.

[A1 A2 German]

Take an AWM valve cover and slap it on an AEB motor and start it.

The air blowing out of the ~10AN port is quite considerable. To the point you have to question what's been hampered by having a a sealed AEB valve cover. And that's at idle mind you. Anyone above stock I would encourage consider doing the swap so the motor can breath.

[Wrath And Tears]

High horsepower really doesn't have too much to do with it.

The air blowing out of the ~10AN port is quite considerable. To the point you have to question what's been hampered by having a a sealed AEB valve cover. And that's at idle mind you. Anyone above stock I would encourage consider doing the swap so the motor can breath.

Good to know, I had only really seen talk about it with high horsepower builds.

[VanCityA4Q]

Would having a vent to atmosphere catch can not do the same thing? I mean the the block vent is connected to the head anyways.

[VanCityA4Q]

Personally on my big turbo build I took all the pvc system out, along with all emissions systems. Dont know why you would keep all that crap in there anyways. Just looks like crap and fails prematurely.

[Avant Nate]

I dont want this to become a pcv debate, but considering the crap that comes out of my catch can, I'm glad that I have vacuum to my block. NO pcv valve, just block breather to catch to tip. As far as dumping to ground, in my research, you you're also throwing some horses away. Just Google it.

[redline380]

considering the crap that comes out of my catch can, I'm glad that I have vacuum to my block.

Let's break this down.

It's called a PCV system, which stands for positive crankcase ventilation. The positive means positive pressure. This means that the PCV system is used to help vent pressurized gas out of the crankcase. So why would you need vacuum to pull it out? You don't, everything will come out because it is under pressure. You don't hook a vacuum line up to your air compressor to help get the compressed air out, do you?

Also, the baffle inside the AWM cover is not plastic, it is aluminum and riveted to the inside of the valve cover. I would personally run a vented cover on your car because you don't want pressure to build up in there.

[GrapeBandit]

PCV debate💃

[A1 A2 German]

Redline is correct.

It's like allowing a ballon to deflate, no need to push on the ballon or help aid it, it vents itself.

I will warn anyone from venting their aeb valve cover, if you do you'll get pretty large oil loss. I was filling up my catch can once a week, opposed to ~1/3 full in 6 months vis an AWM valve cover. The baffles help seperate the oil and keep it from being sucked out the hose with the air and filling up the catch can.

[ray4624]

So the correct way to go about it would be to get an awm cover? I'll go that route myself. I'm already running the 2.0 coils. So should I run an 01 valve cover?


Sent from my iPhone using Tapatalk

[GrapeBandit]

you can always just get a small baffle welded inside the VC right under the vent hole if you decide to put one. probably not the best option for most, but if I get excessive pressure on my setup, that what I will do because I dont want to get rid of my euro VC

[b5a4erik]

So without a Catch Can setup, switching the AEB cover for the AWM wouldbe pointless?

[GrapeBandit]

So without a Catch Can setup, switching the AEB cover for the AWM wouldbe pointless?

no. if aeb, you get awn VC, or get a baffle welded to the inside underneath the vent

[ray4624]

you can always just get a small baffle welded inside the VC right under the vent hole if you decide to put one. probably not the best option for most, but if I get excessive pressure on my setup, that what I will do because I dont want to get rid of my euro VC

Damn that doesn't have a baffle either? That was my other plan. Love the look of the agn? Valve cover.

[GrapeBandit]

Damn that doesn't have a baffle either? That was my other plan. Love the look of the agn? Valve cover.

thats what I have, it has vent port, but no baffle. I had my my port blocked off and never had issues.

[b5a4erik]

So it helps the engine breath... how does it do this?

[Davdraco1]

The PCV is created from blowby in the cylinders, yes, all cars have some form of blow by. This builds "positive crankcase pressure" and will start blowing seals in the head and block if not relived of. Reliving this pressure doesn't help the engine breath like how most people think of the term "breath", but rather prevents premature failure of seals in it. And the more boost you run, the higher cylinder pressure you have, the higher PCV you have. Grape and I just vent to the ground, because it's easier. The EPA wants it to be put back in the engine to be reburned because it contain I burnt fuel, bad for the environment. The moral of the story, you need to vent it some how, if you don't, seals start to go and oil starts to leak. Hope this explained it enough.

[b5a4erik]

Yes Sir,

A decent explanation.

Now, I currently have an AEB with a PCV system. If I were to acquire an AWM valve cover, how would I setup this "venting system" if I wanted it to vent back into the engine?

~ ea

[Davdraco1]

There's a 3 port rubber piece that attaches to the awm valve cover. One port goes to the crankcase, one obviously from the valve cover, then the third goes to the TIP

[b5a4erik]

There's a 3 port rubber piece that attaches to the awm valve cover. One port goes to the crankcase, one obviously from the valve cover, then the third goes to the TIP

Would I need any additional pieces besides the Valve Cover?

[Davdraco1]

I would google the AWM pcv system bc I won't be able to explain it well enough in here. I also don't know how the pcv system is on an aeb so I don't know the differences between the two and being that they are two different blocks if it's even possible. I would imagine it is bc the block differences are elsewhere but I don't know for sure. Is there any reason why you want to keep this system? Emissions testing or are you worried about it?

[Seerlah]

High horsepower really doesn't have too much to do with it.

Not true. The higher the hp the higher internal pressures will be. In a nutshell, the more the combustion air the more to vent.

And that baffle is so oil does not splash out. I actually took mine out by drilling the rivets. It then goes to a -10an line right to under my car. That baffle is a restriction. When removed, it releives the restriction and positive results can be seen in examples like less frequent vcg changes on bt applications. The intake cam has a plastic cover splash guard that goes over it. This is all that is really necessary to avoid oil being routed out of the port, and how I have mine setup. Been running it this way for a couple years now. If the aeb never had one, pick one up on ebay for cheap, tap your aeb cover for npt threads, place npt to an adapter and do as you please from here (ie catch can).

[DoesntCare]

If you need the large coil pack holes and holes for coil pack bolts you could pick up a AWD valve cover from a VW 1.8t.

As for the PCV, personally I ran (will run) a recirc catch can so there is almost always a source of vacuum on the crank case. I know it doesnt NEED it, but the way I see it is, the less positive pressure in the crankcase, the less resistance there is for the pistons on the combustion stroke, the more power is sent to the crank. Not that I expect any real gains from running the system this way. Also I get the added benefit of not having to smell the PCV every time I drive my car.

[redline380]

If you need the large coil pack holes and holes for coil pack bolts you could pick up a AWD valve cover from a VW 1.8t.

There is truth to the fact that higher horsepower will require additional venting, especially in forced induction applications.

However, the overall health of the engine is the most important factor in determining what is needed. That Jetta TDI I owned had more blowby that any engine I have ever felt. Even at idle, with the pancake valve removed from the valve cover, there would be so much air coming out of there that a guy could fill hundreds of balloons an hour.

[The Overclocker]

I did exactly what you are looking for


Aeb vc custom ventilated with a an-10 fitting

No aluminium baffle like the 2.7tt's

I just left the plastic caps over the intake cam

Here is a picture !


Sent from my iPhone using Tapatalk

[The Overclocker]

Sent from my iPhone using Tapatalk

[The Overclocker]

Make sure you give the fitting connector + the weld on bong to the fabricator

You see how close the black fitting that screws to the weld on bong , 1mm apart , make sure it clears or else you could not screw in the black female an-10 to the weld on an-10

Thats rhe only important part

And the welder is going to have to weld from inside , the torch does not fit properly on the bottom if welded from outside


Sent from my iPhone using Tapatalk

[GrapeBandit]

the black plastic cover that goes over the intake can should fit under the AGN VC, correct?

[redline380]

the black plastic cover that goes over the intake can should fit under the AGN VC, correct?

It should, but no guarantees. It is just a splash guard anyways, not really super necessary to the operation of the vehcile

Yes, look like it is in there

[GrapeBandit]

It should, but no guarantees. It is just a splash guard anyways, not really super necessary to the operation of the vehcile

if i want to vent my VC without losing oil its necessary lol

[A1 A2 German]

I drilled out the baffle holes on the AWM vc, so it wouldn't inhibit the air flow. Per Seerlah's comment. Takes only a couple minutes, just inlarged them with a larger bit.

And as GB said, you could weld a baffle to an AEB...yet for $35 shipped on Ebay you can buy an AWM vc. I wouldn't run an AEB ever again, the oil loss was ridiculous.


Edit: Guess I'll post up my custom AGN vc and Vibrant scavenger kit today. You have many who want a catch can, yet don't want to chance a smell or can't use one due to local laws (sniff test). And it's cleaner then both the oem system and catch can (visually and literally).

EDIT: Made a thread, kinda related to what we're talking about: http://www.audizine.com/forum/showth...3#post11567863

[The Overclocker]

Ill report if i get massive oil amounts in the catch can or if strong odors occur

But im sure it'll going to be fine With the plastic cam slash guards


Sent from my iPhone using Tapatalk