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Old 03-09-2014, 08:03 PM   #1
henressyy
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Default Crawford AOS Install w/ Photos (2013 WRX w/ s0718 TMIC/stock)

After tons of time spent trying to find a good Crawford AOS install instruction for '11-'14 WRX, I figured I'd make my own after using IAPerformance
and CRAWFORD and trying to figure out what goes where and how.

This is my way of the install and I am not responsible for anything that happens to your vehicle! It is your choice to follow these instructions. If anyone notices anything is incorrect or should be done differently, please feel free to chime in! I am just updating some things that the other 2 threads need.

*note - I am limited to only 10 pics so refer to IA's thread for some pics.
http://forums.nasioc.com/forums/show....php?t=2011986

Tools needed:
-12mm socket
-10mm socket
-8mm socket
-lube/wd-40
-short phillips or flathead screwdriver
-pocket screw driver or tiny flathead
-radiator hook
-angled needle nose pliers
-regular pliers
-hose pliers unless you can pull of/install the hoses with your buffness
-flashlight to see better
-optional: 6 pack of beer
and that's all I can remember.

Step 1 - Remove your TMIC, as stated by IA, you are guaranteed to fail the AOS install if you can't do this.
(3x12mm bolts and 2x10mm bolts)

Step 2 - Remove crank case breather

what it looks on '13 wrx:


Step 3 - Install Y pipe (refer to IA)
My kit came with a big short hose (forgot to take a pic) and that's what you'll use to insert the y pipe into and install that into the crankcase hole.
You'll need some lube to get the y pipe into the big short hose and the hose into the crankcase hole.


Step 4 - Electrical plug from PCV (refer to IA)
There are 3 white plugs located behind your intake manifold. The one in the middle is what IA is referring to.

Keep the connector connected and I used the provided cap to cap off the end with a ziptie as well. Tuck this away under your manifold or wherever you like/can.

Step 5 - Cap off the holes (refer to IA)
In your kit, you should have a little bolt looking with an allen opening. Insert that bolt into the bigger hose.
I used a bolt laying around to plug the smaller hose, wrapped it with teflon and ziptied.

Step 6 - Head breather tube (refer to IA)


'13 wrx's hard breather tube looks a bit different. Remove this hose (3x10mm I think, and 3 hoses connected to it). 2 hoses at each end that connects to white plugs that lead to the head.
Disconnected the hose from the white plugs.
3rd hose is located underneath the intake manifold. It is attached to your intake inlet hose. (my hook tool is pointing to it. this is where a needle nose is your best friend.)
Push aside your harness carefully and squeeze the breather tube out

There was one 10mm holding the harness. Sit your harness correctly in plate. Reinstall that 10mm.

Step 7 -Here is the tricky part that I had to figure out.

Keep that connected to the left/driver side head and keep the plug connected to the hose to the head. Pull off the 4ish inch hose from the other end of the white plug that was connected to the breather tube.

Step 8 -Insert your longest 1/2" hose provided in the kit and run it over the top of your manifold.

Connect the T provided into the other end of this long hose. May need some force/lube.


Step 9 - As stated in step 7, do the same for the other side. Use the 11" hose and connect it to the white plug and connect the other end to the T.




Step 10 - Connect the the 10" hose to the end of the T and to the upper side of the AOS.

Step 11 - Connect the 22" long, 1/2" width to bottom of AOS and bottom of the Y connector. Use the longer fire sleeve with this hose.

Step 12 - Coolant hose replacements: Refer to Crawford steps 11 to 14. (Heater hoses 13.5" and 19" are used and will go to lower side of AOS and rear of AOS. Don't forget your hose clamps! I also use the fire sleeves for these hoses, as stated by Crawford.

Step 13 - Connect the 24" hose from the very top of the AOS to the intake inlet hose as stated in 6 (pointed out by my hook tool).

Step 14 - Make sure everything is secured, ziptied, all okay.

Step 15 - Start your car up and enjoy your AOS!

NOTE: I started up my car and noticed that when I tapped the gas pedal, the car stuttered a bit. Plug in my accessport and noticed my boost gauge not working.
Reason:

This hose came off when I was going after the intake hose. Plugged it back in and my gauge started working.

Goodluck!

Shoutout to Crawford for making an awesome product and providing instructions.
Shoutout to IAPerformance for having the groupbuy and being awesome.
Shoutout to cheizy for his support (my cousin)
And lastly Bun (don't know his username) (blue sedan with feals and vsp wheels) but he helped me over the phone!
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Old 03-10-2014, 11:49 AM   #2
wakeupandbord
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subscribed nukka!
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Old 03-10-2014, 12:30 PM   #3
IA Performance
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Good write up!

Stephen
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Old 03-11-2014, 04:09 PM   #4
heyitzdinny
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Will this layout work on 07 model?
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Old 03-11-2014, 04:41 PM   #5
IA Performance
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The 2007 WRX layout will be the same, or very similar to, the 2004-2007 STi as well as 2008-2014 STi. Here is an install guide:

http://www.crawfordperformance.com/w..._Version_2.pdf

amendment to page 10
http://www.crawfordperformance.com/w...CP_AOS_Fix.pdf
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Old 03-11-2014, 11:57 PM   #6
henressyy
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thanks guys!
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Old 08-11-2014, 07:56 PM   #7
xrayman2884
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I'm having some trouble getting my AOS installed. Help a guy out? On a 13 wrx mine looks slightly different than the images provided by crawford. I'm not seeing the "S" hose on mine. Slightly to the right of the intercooler-turbo connection, I found the White breather sensor. After disconnecting the white breather sensor I was having trouble removing the gray sensor from the black elbow plastic piece. In addition I can't figure out what goes where after this step. Also no idea where the metal plate on the intake manifold is..

For reference I'll use crawfords site: http://www.crawfordperformance.com/w...-Version-2.pdf
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Old 08-12-2014, 09:05 AM   #8
IA Performance
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To better assist you, please post photos of the areas in reference from your car.

Stephen
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Old 02-08-2015, 12:38 AM   #9
kaczmarz
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325/347, 380XT, 8 cm2

Default Install Questions

I prepare to install my Crawford AOS (hasn't been shipped yet) on my 2008 WRX by going through install threads and Crawford install instructions.

I have some questions:

1. Should the turbo inlet connectors for both heads and crankcase breather be capped off?

2. Why is the intake manifold used to return of separated air rather than turbo inlet which has full time vacuum? I believe STI uses latter option.

3. How does "Y" connector manages to do both vent the crankcase and return separated oil?
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Old 02-10-2015, 12:19 AM   #10
Quirt
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Quote:
Originally Posted by kaczmarz View Post
I prepare to install my Crawford AOS (hasn't been shipped yet) on my 2008 WRX by going through install threads and Crawford install instructions.

I have some questions:

1. Should the turbo inlet connectors for both heads and crankcase breather be capped off?

2. Why is the intake manifold used to return of separated air rather than turbo inlet which has full time vacuum? I believe STI uses latter option.

3. How does "Y" connector manages to do both vent the crankcase and return separated oil?
Your first question is confusing but if I understand you correctly then one of the turbo inlet connectors does get capped off.

The return line with the clean air after the AOS goes to the turbo inlet and like you mentioned does have full time vacuum. Not sure what made you think it connects to the manifold as the manifold has pressure as well as vacuum.

The Y connector has two ports on the top, one is for the crankcase pressure to pass through and the other is for the oil to drain back through.
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Old 02-23-2015, 06:52 PM   #11
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New install vid for the late model WRX owners, sorry we did not have this for you sooner!

https://www.youtube.com/watch?v=Fs9Q...ature=youtu.be
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Old 02-25-2015, 04:02 PM   #12
Never Summer
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My friend has a Crawford aos and it's not very effective. Still gets oil in his Fmic piping. Need something better then the Crawford for extreme lateral g-force, there is too much oil for it to handle. He's looking for something better. Perhaps the IAG AOS


Sent from my iPhone using NASIOC
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Old 02-26-2015, 08:08 PM   #13
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Old 03-17-2015, 12:00 AM   #14
TRVIING
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@henressyy: on your step 4, could you please get a photo of your electrical plug? I have trouble finding it. Mine is also wrx 2013 but i am from australia. I don't know if my car is different with yours. I really appreciate your help.

Tom
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Old 04-29-2015, 08:04 PM   #15
Itsorgazmo
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The crawford vid is your best best. One thing I did was pre label all the hoses to make it easier ie length and location
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Old 04-30-2015, 05:57 PM   #16
henressyy
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TRVIING - unfortunately, I sold my car so I cant get you a picture. Sorry! And its been too long since I've installed a AOS so I can't recall how it looked like.
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Old 06-01-2015, 06:02 PM   #17
DD1fastWRX
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I got the v1 with just the hoses and y pipe. Could you tell me what fittings I need to come up with please? 09 wrx
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Old 06-01-2015, 06:07 PM   #18
IA Performance
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I believe Crawford offers a replacement hose kit, although I'm not sure what the cost is. Give them a shout, especially since oil vapors do not pair well with most hoses found at auto parts stores. Alternatively, here is a check list of all parts included:

http://www.crawfordperformance.com/w...-Version-2.pdf

Stephen
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