GrimmSpeed Air Oil Separator (AOS) Install

An Air/Oil Separator has one job, remove the oil from the engine ventilation system so the oil does not get sent through the intake system.
The GrimmSpeed AOS has a unique patent pending design that allows you to maintain your PCV Valve while separating the oil out of the crankcase and head ventilation air! Our AOS will allow your engine to run more efficiently due to the separation of oil from the intake system. When there is oil in your system, the result is 1) reduced fuel octane 2) higher chance of engine knock(detonation) 3) worse emissions 4) higher oil consumption. Our AOS will solve all of these problems.

In GrimmSpeed fashion, we have made a very compact unit that packs a powerful punch(and looks good while doing it)!

No more having to check/empty your catch can and refilling your oil. The GrimmSpeed AOS coalesces oil without using a mesh media. Mesh medias can cause contaminates to collect and build up resulting in possible sludge. Our AOS is self maintained so you can just sit back, stop worrying, and enjoy driving your car!


https://www.grimmspeed.com/catalog/product_info.php?cPath=91&products_id=191

Category:

Autos & Vehicles

Tags:

• GrimmSpeed
• AOS
• Install
• AOS install
• aos
• grimspeed
• grimm
• air oil separator
• blow by
• crawford
• sgm
• catch can
• PCV
• oil consumption
• turbo seals
• oil in intercooler
• oil
• subaru
• sti
• wrx
• impreza
• legacy
• forester
• forestor
• AWD
• nasioc
• turbo

[myfuneral86]

will this fit on 08+

[GrimmSpeed]

@myfuneral86 Yeah we actually make a kit specifically for the 08+

[whiteshark27]

How come all the installs of AOS and catch cans terminate the electronic check valve on the PCV? Is there anyway to achieve air oil separation but maintain that functionality?

[GrimmSpeed]

@whiteshark27 Our AOS retains full functionality of the PCV system, the "check sensor" is not actually a sensor in the conventional way, its simply a connection to verify that the PCV system is installed.

Will

[Ken327]

@GrimmSpeed Hey Will, so will this "Check Sensor" If plugged up like you did in this video, cause a CEL by chance?

[GrimmSpeed]

@Ken327 Negative, if you do it like the instructions you have nothing to worry about!!

Will

[EdaP79]

Q? I put this on 08sti, and cleaned pcv very well was rattling around no doubt. still getting tons of oil in tmic/intake/turbo inlet/bov sprays it. double/tripple checked all hoses. nothing leaking??? hoses connected properly via instructions from grimmspeed website. Please help suggestions welcome by anyone with a decent knowledge base on this please. Thanks

Edap79

[Jayeeyee]

I still get a thin oil film/residue inside my TMIC. Also.. in colder weather.. when you shut off your car after it warms up.. the air inside the AOS lines condensate into water vapor/droplets which gets mixed up into the oil. =(

[TTarlov]

The difference is that GS unit is much more compact and requires less maintenance. Installing process is less involved as well. If you have milky oil on short drives then an AOS wont help you. You got bigger problems to worry about. AOS helps with blow by build up in the intake and intercooler piping.

[tegagsr]

Whats the difference in this unit compared to the Crawford AOS, does this one help with short drive, auto x , and the milky oil from cold climates?

[xxftwismymottoxx]

badass product. way better than a catch can. now all u need to do is lower the price

[joquintero10]

"here at gs we got a lot of hoes" classic lol

[tehrockk]

very nice video!