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Old 01-30-2010, 03:20 PM   #1
txl146
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Default How to install Grimmspeed AOS (air oil separator) on WRX

Spent 30 min installing Grimmspeed air oil separator on my WRX today.



1. Disconnect this hose which is connected to TMIC hard pipe.


2. Position the disconnected hose facing toward oil cap as shown here. Connect supplied plastic connector:



3. Remove oil cap


4. Cap the nipple off of turbo inlet close to turbo by using supplied rubber cap.


Last edited by txl146; 01-30-2010 at 03:26 PM.
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Old 01-30-2010, 03:20 PM   #2
txl146
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5. Install AOS into oil inlet.


6. Using ~9" of supplied hose, connect upper port of AOS (middle one) to turbo inlet return line.



7. Using supplied hose, connect left bottom port with "T" from crankcase.



8. Using supplied hose, connect right bottom port with TMIC hard pipe.


Last edited by txl146; 01-30-2010 at 03:27 PM.
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Old 01-30-2010, 03:28 PM   #3
Longshot55
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great writeup bro, it was colder today than yesterday lol. Hopefully you had a heated garage or some nice gloves.
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Old 04-01-2013, 02:08 PM   #4
rburns95
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you might want to ground those im guessing speaker wires? to something that doesn't get super hot (aka your intake manifold). might help just a thought
Quote:
Originally Posted by txl146 View Post
5. Install AOS into oil inlet.


6. Using ~9" of supplied hose, connect upper port of AOS (middle one) to turbo inlet return line.



7. Using supplied hose, connect left bottom port with "T" from crankcase.



8. Using supplied hose, connect right bottom port with TMIC hard pipe.

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Old 01-30-2010, 03:27 PM   #5
txl146
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9. Go for a test drive


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Old 01-30-2010, 03:28 PM   #6
txl146
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Old 01-30-2010, 04:03 PM   #7
wantsti
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Its kinda dumb it covers the dip stick so you cant check your oil.
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Old 01-30-2010, 04:52 PM   #8
djoye
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That really explains a lot, I was wondering what the hell the oil dumped into but I guess it goes on back around. If it weren't so pricey I'd dump my junk catch can.
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Old 01-30-2010, 05:06 PM   #9
Digitalfiend
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Quote:
Originally Posted by wantsti View Post
Its kinda dumb it covers the dip stick so you cant check your oil.
It won't affect all cars the same way. For instance, on my '08 the dipstick and oil filler neck are very far apart:

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Old 01-30-2010, 05:15 PM   #10
BadTrainDriver
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Nice Sweater...now turn your Dipstick the correct way...)

BTD.
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Old 01-30-2010, 05:21 PM   #11
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n/m I answered my own questions.

Helps when you read =P

Last edited by Concillian; 01-30-2010 at 05:35 PM.
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Old 01-30-2010, 07:26 PM   #12
WRX Loki
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Nice Write Up
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Old 01-30-2010, 10:29 PM   #13
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u might wanna reroute that hose, may slide and obstruct the throttle linkage
or the end of the throttle linkage could pierce a hole in the hose
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Old 01-30-2010, 10:35 PM   #14
jokers
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heres my setup 02 wrx



and doesnt obstruct my dip stick either cool

im goin to redo my intake line, gonna get some clear tygon line, so i can see if there any oil going to the intake, just a precaution

Last edited by jokers; 01-30-2010 at 11:47 PM.
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Old 01-31-2010, 09:41 AM   #15
thrasher
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Quote:
Originally Posted by jokers View Post
heres my setup 02 wrx
This is how I'm going to do it too. Blocking the dipstick = FTL!

Thanks guys!!

Last edited by thrasher; 01-31-2010 at 04:20 PM.
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Old 01-30-2010, 10:42 PM   #16
txl146
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Hose is really tight in there, so it won't move to obstruct throttle linkage. Also, I think end of throttle linkage is not sharp enough to pierce the hose.

Surprised you were able to turn it that much though as I can no longer turn more than the current setting.
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Old 01-30-2010, 11:50 PM   #17
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lossen the middle turn the outer where u want it tighten the middle down
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Old 01-31-2010, 01:35 AM   #18
txl146
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Here is the final version. I plan to re-route them so oil dip stick can be more accessible.



Jokers, that's another good way to route the hoses. It's just annoying that you have to remove the TMIC.
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Old 01-31-2010, 09:51 AM   #19
jokers
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hey get it done the first time
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Old 01-31-2010, 03:58 PM   #20
gtboost
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thanks for taking the time to do a writeup.
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Old 01-31-2010, 04:36 PM   #21
bigolrig
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do you have to use the GS cap?
i have a cobb oil cap and was wondering if the A/O was threaded like stock
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Old 01-31-2010, 04:57 PM   #22
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ur gonna have to sell it

Quote:
Originally Posted by bigolrig View Post
do you have to use the GS cap?
i have a cobb oil cap and was wondering if the A/O was threaded like stock
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Old 01-31-2010, 05:15 PM   #23
XmikeX
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feel any difference? i wouldnt expect you would but justwondering
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Old 01-31-2010, 07:02 PM   #24
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jokers,
where does that driver side breather line route to??
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Old 01-31-2010, 07:23 PM   #25
jokers
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Quote:
Originally Posted by scoobystas View Post
jokers,
where does that driver side breather line route to??
its routes to the T of the crankcase and pcv
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