It is a great installation video and a great product as well. Highly recommend doing this who ever won a WRX/STI. I am gonna do it by myself. Just wanna add a note on this thing: 1) Intercooler mount bolt torque specs are 11.8ft-lb 2) Intercooler hose warm clamps torque specs are 2.2ft-lb 3) Bypass Valve torque specs are 11.8ft-lb 4) There is two coolant line that is pre constructed with the AOS. I asked them about the order which line goes where (Since one goes to the Expansion Tank, one goes to the turbo outlet). They told me it does not matter. You can attach them in any order you want
I love this AOS, it was one of the first mods I bought for my car. Very well explained step by step video - he makes it look easy. Still way out of my league to install this myself. I got my local tuner shop to install this for me instead.
@The Doe Show it depends on how much the shop charges an hour for labour. Where I am from, I had to pay an additional $500 - $600 for the shop to install it for me. It took them about 4 - 5 hours to properly install the AOS if I remember correctly. I also had other things being done to the car at the shop during that time, so I'm roughly estimating
@aqwheavenlehealer so far, so good. My car has been treating me really well. I do my best to stay on top with basic maintenance. I am currently at 67,000 km's - daily driving and protuned
@@dc.wrxsti thanks for the reply, I’ve had mine for a year now and it’s been doing well, I’m a firm believer in “take care of it and it’ll take care of you”
Just used this video for my 2016 Sti. The install was a little different but pretty easy. I struggled to get turbo hose from Intercooler back on no matter what tool I used to get it over the bottom . I found that if you slightly change the angle of the hose downward it slides perfectly into the turbo without any tools and fits way better. I wanted to comment this for anyone who might run into the same issue. The version 3 is absolutely worth the money.
wish i saw this earlier. just installed it an hour ago and besides the cheap clamps gettin the turbo back on the intercooler was probably the most difficult part
For real! I’ve got a 2017 STI that I’m getting ready to put the AOS On. Totally dreading the intercooler. I had to mess the with intercooler awhile back…. It was such a pain. I’ll try your tip tho!
Bout to do the install in a day or two. I have watched this video 3-4 times already, and will watch a few more times before doing the install. I have all tools ready to go, and am excited to get this on the car. My 2011 wrx had cylinder 4 compression issues, and I didn’t care for it as I should’ve, and definitely learned my lesson on what is needed for these cars to be healthy. I traded it in for a new 2020 STI that ive kept completely stock thus far. This video should be exactly what I need to understand the process more thoroughly. Thank you IAG, for providing this video. I understand most shops charge quite a bit for this so i decided to give it a go myself. I’ll let you guys know how it came out after I’ve finished the install. Next up after this is the cylinder 4 coolant mod, along with a Koyo aluminum radiator. Only then can I be comfortable doing performance upgrades down the road, as this is a daily driver that id like to keep healthy over its lifetime…
Alright guys, I’m taking a break. I’m at the point of reinstalling the intercooler, but having some issues with fitment. Should be able to get it on with some patience. I struggled to get the yfitting on to the block where the oil returns from the aos, that took me the longest to get right. Hard to see down there and I couldn’t get my throttle body to move quite as far to the side as they showed in video. The other parts that took the longest we’re getting the clamps all set right. Some of the steps took me longer than I was hoping, and I had more coolant leak than I would’ve liked. I’m sure I’ll get some smoke on start up due to that. I’ll come back after I get some rest and get the IC reinstalled. I hope to have the car running by this afternoon. I’m hoping it’s all solid and there’s no leaks on start up. I’ll have to add some coolant but that’s fine and was planned for.
@@coryanderson5210congrats on your progress! Would love to hear if you’re finished now. I’m over halfway through and yes the y fitting was killing me. I found out you can re use the OEM rubber fitting that’s the same size and it goes on much easier but is still very secure!
I couldn’t get the TMIC back on, due to the new tubing that ran under it. Followed instructions, and tried a few different things but couldn’t get it to fit so I just took it all off and returned the car back to stock. It’s not what you all want to hear, but I’m just gonna keep this car stock at this point. There’s more important things in life right now to take care of than to spend time and money messing with my perfectly fine running car.
@@coryanderson5210 That sucks. I wouldn't give up, maybe take it to a mechanic and work on it with them or something. Or perhaps you need a couple more special tools to help you get it done. You could also just get a catch can instead which I believe is easier to install. Even without either of those, your car will run just fine, its not a big deal.
THANK YOU FOR THIS IAG! Doing the install right now and had so much trouble getting the Y hose on the block.. If you’re having trouble as well, I saw a comment that said to reuse the OEM hose and I did so and slipped right on with OEM clamp.
Use worm gear clamps where possible, particularly on the hose that drains coolant into the turbo feed. My provided clamp allowed it to leak. Also, if you are using a FMIC, just remove that bracket they tell you to feed the hose through the hole of. It is only used for supporting the TMIC. It will free up space and make getting the intercooler to turbo coupler on much easier.
This happened to me also. I had to run to wal mart to get clamps. I ended up using the one they provide it and a worm gear clamps. Just to make sure it wasn’t leaking because I was tired of taking off the TMIC.
This is in my opinion the best attention to detail video on The AOS. I own a 2020 base model WRX/STI I was thinking about putting an IAG AOS on. Thank you IAG. A great video. Subies forever guys and gals.
Halfway through the install currently, will update when done! So far going smooth, biggest install for me ever so I’m taking my time and making sure it’s right! One note: when you go to put your Y splitter in consider re using the OEM hose the same size, it fits so much better and you won’t break the fitting or your hand trying to put it in, lol! There’s a video someone linked where the guy shows using the stock hose instead of the one provided by IAG!
Update: I am done! Everything is back together and running good! By far the worst part was getting the intercooler back on… the turbo hose connection will make you go insane! You need a lot of lube/grease and a nice long pick to help guide it on! Very challenging yet rewarding once everything is together. I bled the system, now I need to add some coolant back but other than that I’m ready to ride’
7:08 A buddy and I started on this today. Tried all sorts of things to get that breather hose with the pre clamped clamps to go on. Nothing would work. We ended up having to slide the small hose fitting on and then carefully lower the clamp down with hose pliers and clamp it. We spent probably 4 hours trying to do it, and broke the y fitting in the process. Good luck.
For those who are wondering about the 2017 Sti install. Depending if is IAG v2 or v3 Install will be slightly different. I installed V3 on my STI so I kinda followed some part of this video but you have to see the other video from this guy BOOST AND SHUTTER.. he explains how to install on 2017 STI but the problem with THAT video is that he is installing a V2 instead of the V3.... once you get to the part of installing all hoses, you gotta SWITCH to this video. Im telling you this because I did mine like this and it was perfect install. If I had someone tell me this before I wouldn't have taken 5 hours to install mine. If any one has any question, just reply. I know what it is to ask questions on all these youtube videos and they answer a month later 🙄🙄 Cheers🎉
Going to try this , this weekend on my 2017 sti , any advice other then what you stated ? I had my TMIC off to change the PCV valve, but all the added hoses from the AOS makes it look hard for the TMIC to fit , is it save for the hoses to touch the inter cooler ? And did you use the sliver heat sleeves
@@mikeyrov5230 hi man! Yes I used the silver shields on the hoses... It is ok for hose to touch the intercooler as long as the hoses are not crimped... Make sure all Hoses connected to the COOLANT tubes have a hose clamp preferably a Screw clamp because it seems like the hoses that come with the AOS is slightly bigger and you will get a small leak.
@@mikeyrov5230 also search on a separate video on how to install TMIC easy. It was the only video I found that made it easy to put back the TMIC because it is difficult! Honestly the hardest part of the whole process... Make sure to cut all hoses that go behind the TMIC longer so they dont create tension when trying to put TMIC back... If any other questions let me know!
@@mikeyrov5230 ohhh! Last thing. If you are considering installing an engine bay STRUT BAR (Perrin) you much install AOS tank lowest possible because if not then your strut bar wont fit... I had to return mine because of this... Hope I helped you. LMK!
The two coolant hoses installed, from the can Frist is it the left hose on the can that goes to the the coolant expansion tank and the right hose from the can that goes to the turbo inlet hose ? Or is the order from the can not matter EDIt : Found the answer , coolant lines from AOS can go either way to the expansion tank / turbo inlet
IAG, you need to come up with a better solution for installing the Y-fitting. It took me 5 hours, help from my dad, and several trips to the store to get that thing on the block. I ended up buying a new hose and used worm gear clamps to get it to go on. There is zero percent chance of that thing going on the block after you've clamped the bottom of it.
@@mikeyrov5230 I ended up buying a new hose because I mangled the one that came with the kit. It's just regular hose you can get at any auto store. I used 2 worm gear clamps and my dad was actually the one to get those on tight, I don't know how he ended up fitting a socket wrench in there to do it but he did. I pulled up on the Y-fitting pretty hard to test how tight it was and it didn't budge.
@@andrewknutson91 damn , yeah that’s such a tight spot , seems impossible to get a wrench on , gives me hope tho haha I’ll have to have extra clamps / hoses.
If you break that little piece of crappy plastic, it is 23.61 with shipping to replace. I can’t recommend this product until they rectify this obvious problem.
Currently stuck at putting the inter cooler back in. Pipe for turbo will not slip back on no matter what tool I use to help the bottom lip go over, it will not fully go in flush.
Awesome video, up until now I was a bit concerned about doing this myself, you have aleviated all of my concerns. I live in California and have to have a CARB executive order approved Air Oil Separator, I believe IAG and Cobb teamed up and the Cobb unit is basically the IAG unit with rebranding and a Cobb certification. If this is true, this video just sealed the deal. Thanks again.
Also you will have 3 bolts leftover that connected to wiring harness bracket and pcv valve brackets attached to intercooler! Also wondering if the coolant lines order matter? I had right plug installed to further right coolant line and left to left. Im thinking it should be okay if i mixed it up but he never mentioned it. Great tutorial vid besides that!
Word of warning to those such as myself that live in cold climates. If you drive your car for extended periods (NOT stop and go) in extreme cold, the AOS lines WILL freeze. I'm currently thawing out my entire PCV and intake system. I want to emphasize that this is NOT, I repeat, NOT a problem with the AOS, it is an inherent issue with the location of the PCV and the intercooler on WRX's. The cold air blows through the intercooler, directly onto the PCV lines. Over time, this will cause the moisture (water) in your system to freeze and create crankcase pressure which will push oil into your intake, and possibly blow your dipstick out, which blows oil into the engine bay. One fix that I will try is to put cardboard over the intercooler to try to keep temps in the engine bay high enough to prevent freezing. This does not seem to be a problem with people that drive in stop-and-go conditions, it only really affects those that are driving on highways/interstates for prolonged periods.
@@mikeyrov5230 Great Plains region in the U.S. We can regularly see -20 to -30 F before wind chill in the winter. I did cover my intercooler and surrounding areas with cardboard this last winter, and that helped to prevent the lines from icing up.
I spilt a lot of the fluid coolant? I added more, but it went down my engine. And now it’s smoking when hot! Is that just burning off the spill????? Please help? Thank you.
If you spilled coolant on the exhaust it's going to take a little while to burn off. Keep an eye on your coolant levels and if it doesn't go away in a few days investigate for any leaks.
did anyone else have an issue putting those thick short hose in with Y-pipe into the block? 7:12 my Y pipe broken on me while installing attempting to put it on trying to wiggle it around.. trying to figure out how im going to just get that Y-pipe replaced. literally just bought the iag v3 street from flatiron tuning. any suggestions?
I need help, at 11:40 when he connects the hose to the expansion tank. is that the bottom left hose on the can? and then at 12:00 i'm assuming that's the bottom right hose of the can? the video and the instruction manual doesn't say, and the only closes picture in the manual that kind of shows is on page 48 step 94. it highlights the 2 hose, but's its still a little hard to tell which one goes where.
Does the 2018+ not need the breather hoses on valve covers to be modified? I am done installing all my hoses(per the video) (struggling to get intercooler back on), but I have extra t-fittings still?
Without aa doubt an install I'd do once I reach closer to the end of my cars warranty, however my car is RHD meaning the unit would sit on the other side of the engine bay, is there any install videos or instructions for Right hand drive cars? or for the least do you guys sell the same kit to Australia with extra hosing?
Hi. I just purchased the V3 IAG AOS and I can’t seem to put the one hose onto the middle vent hole or whatever it’s called. I followed your video and it doesn’t seem to go on fully with the clamp on.
was wondering if anyone had issues with this location for the AOS? I had an AOS installed here recently and now I cannot fit my perrin strut tower brace because the AOS is in the way
11:07 is it ok to attach either coolant hose on either side of that coolant attachment? or is there a specific coolant hose for each side, for example the left coolant hose (from the AOS) goes to the top, right coolant hose goes to the bottom
Sorry for the late reply, but yes you can attach the hose to either port. The coolant simply flows into the AOS chamber. The direction does not matter.
Bought my 15 Sti from a pre-owned dealership. Installing this but already stuck. How come mine doesn't have the single black connector (pcv plug) on the crossoever pipe at the drivers side? It already has a bunch of mods on it with flex fuel etc. Any help appreciated.
So I just installed mine step by step, but i hear a hiss near the throttle body. Took the intercooler off again to check all my hoses and I can't find anything loose. When i give it a slight throttle the hiss stops but the car dies
We'd recommend getting a smoke test performed to locate the source of the leak. A few common places would be the intercooler couplers or the PCV hose under the throttlebody.
Will you guys increase the inner diameter of the 2” breather tube just a tad? I install these kits regularly and that tube always gives me a headache getting the y fitting in and the tube onto the block.
I will be installing the AOS on my 2002 wrx. Are these instructions pretty similar for the most part? Not sure if theres any big differences considering the year. Thanks in advance!
You'll want to follow the written instructions on our site for the 06+ WRX models, but the basic idea is the same. You'll also need to follow our instructions for relocating your cruise control module.
I wished the written instructions would have mentioned which clamps to use for the coolant line...would have saved me from pulling cooler again. TH-cam FTW I suppose.
Thanks for the video; follow everything to a T, with one exception. That new drain hose with clamps that goes under the turbo / but the throttle body. There was no way I could get that on. Tried for 45 minutes and wouldn't budge. I watched this video (th-cam.com/video/vVFrBlO8FxQ/w-d-xo.html), where the guy re-used his factory hose and that's how I ended up getting all of this to work. Other than that, fantastic video and fairly straightforward install. Took my son and I about 3 1/2 hours from start to finish. Local Subi shop quoted me about $676 to install at 4 hours of install time, so I figured I'd see about installing it myself. After watching this video and the other one I posted, I was confident that I could do this (and I am no mechanic, by any means).
Thank you for that. I had originally watched the other video to get prepared and I forgot he re used that OEM hose for the y fitting! I was dying until I found that out, thank you so much! It slipped on nicely once I did this.
Installing iag Aos street series on a 🇦🇺 wrx 13 with you iag stage two tuff! Emission laws are much different here! Do I need check valves for the two turbo inlet breather hoses?
We can't speak to your local emissions laws, but additional check valves are not usually required. If the vehicle has PCV flow sensors you should keep them in position when installing the AOS.
whats the hook up for 2015 sti?!?!?! I read in the comments its connecting the two vent hoses directly to the front most valve cover vents... but where is this stated from IAG in instructions!! The only instructions IAG has for 2015-2017 sti is the exact same instructions from 18-20 sti becasue its all under the exact same install manual. Yet the comments say otherwise. SO IAG WHAT IS IT?? Do I do what you guys have said multiple times in the comments or do i follow your 15-20 IAG aos v3 install manual?? and if it is whats in the comments.. where do I find that info from IAG directly!!!
Mines didn’t last long as it started leaking from the upper portion of the canister. They sent me new seals to rebuild it but it still leaks, but not as bad as before. But a coolant leak is never good no matter what.
Everything in the beginning of the video that you said to disconnect is nonexistent in my 2015 STI… there’s literally nothing for me to disconnect… I’m so confused
The main difference is where the vent hoses attach. The 15-17 will need to run 2 of the vent hoses directly to the forward most valve cover ports instead of intersecting with the white PCV connectors. Removal of the airbox portion of your intake and battery may be needed to reach those ports.
@@BuckleUpGarage_ exactly. We're working on getting a bone-stock 15-17 in here to finish instructions and we'll have those posted up in a few weeks as well!
Impossible to get Y pipe on to the block with the clamp on. Applying enough pressure to get the hose on just pushes the clap up the hose. Any suggestions?
Same issue. Not sure why they have you tighten the spring clamp before applying it to the block. Works best if you tighten after it’s on. I ended up having to use another clamp.
same here I would like to know, been looking into this for very long, I've read that its the same sort of install with the unit on the other side obviously, some issues people faced in this case was the need for extra hosing
Is there an benefit connecting the 2 PCV hoses to the Blow By sensor white connectors versus connecting the 2 hoses directly to the block like IAG used to instruct to?
If there is enough length on the hoses, you should be able to connect directly to the block as long as you jumper the PCV diag connectors to suppress the CEL. I've not seen the older instructions, but I'm guessing that these new instructions are more EPA friendly since they keep the diag connectors intact. I'm going to perform the install this weekend on a 2017 STI and I'm considering going straight to the block.
@@satsun Thanks for your input satsun. I ran them straight to the block with no issues using the jumper method. I am just curious if the Blow By sensors are important to the operation of the engine since not all systems are 100% efficient and some blow by will still make its way into the block. If you are still top mount intercooler that was the most annoying part of the install tbh. Other than that everything is straight forward. I suggest printing out the instructions in color, watch this video, and take your time. Good luck!
@@trnql_noir Those connectors don't sense anything regarding the content of the lines, they're called 'PCV diagnosis connectors'. Their only purpose is to throw a CEL when the connection between the two parts is open. That's why it's easy to circumvent them. No operational impact by removing them. Glad you were able to run straight to the block. I'll do the same to eliminate those bulky connectors.
@@satsun I wonder why Subaru even implemented these sensors then. Emissions maybe? In my opinions its probably cleaner if you just keep the sensors connected so you do not have loose connectors dangling around. I have been debating whether I should go back and reinstall the OEM hose and sensors since I do not really see any downsides of keeping them. I thought maybe flow may be restricted but I really doubt it. What are your thoughts?
@@trnql_noir I've already done some of the connectors, I used electrical tape to cover the exposed part of the connector so it doesn't get dirty and then zip-tied the connector to the wire harness or something nearby to keep it from hanging loose. They are either for emissions requirements or they're in place because certain PCV lines need to be modular for serviceability, so if part of the PCV system gets knocked loose then there's a system in place (CEL) to notify you of the problem.
On the 2 swivel hoses on the bottom of the AOS, which hose goes to what? It looks like the hose closer to the strut goes to the top coolant reservoir and the one closest to the wire harness to the other coolant line. Is that the right placement?
It is a great installation video and a great product as well. Highly recommend doing this who ever won a WRX/STI. I am gonna do it by myself. Just wanna add a note on this thing:
1) Intercooler mount bolt torque specs are 11.8ft-lb
2) Intercooler hose warm clamps torque specs are 2.2ft-lb
3) Bypass Valve torque specs are 11.8ft-lb
4) There is two coolant line that is pre constructed with the AOS. I asked them about the order which line goes where (Since one goes to the Expansion Tank, one goes to the turbo outlet). They told me it does not matter. You can attach them in any order you want
Absorbing all of this info for when i can own one of these amazing machines
Proper mentality 🙌🏼
Have you gotten one yet?
I'm absorbing this to help my buddies with their's 😅
@@austinbasco2968 Theyre discontinued so i went for something else instead
That’s what I did then made it my reality. Love my STI. Good luck getting yours!
Just in the first minute they already thought me how to open a box very helpful
I love this AOS, it was one of the first mods I bought for my car. Very well explained step by step video - he makes it look easy. Still way out of my league to install this myself. I got my local tuner shop to install this for me instead.
If you don't mind me asking, how much did the install run you? I'm thinking of doing the same.
@The Doe Show it depends on how much the shop charges an hour for labour. Where I am from, I had to pay an additional $500 - $600 for the shop to install it for me. It took them about 4 - 5 hours to properly install the AOS if I remember correctly. I also had other things being done to the car at the shop during that time, so I'm roughly estimating
@@dc.wrxsti how is your STI holding up?
@aqwheavenlehealer so far, so good. My car has been treating me really well. I do my best to stay on top with basic maintenance. I am currently at 67,000 km's - daily driving and protuned
@@dc.wrxsti thanks for the reply, I’ve had mine for a year now and it’s been doing well, I’m a firm believer in “take care of it and it’ll take care of you”
Just used this video for my 2016 Sti. The install was a little different but pretty easy. I struggled to get turbo hose from Intercooler back on no matter what tool I used to get it over the bottom . I found that if you slightly change the angle of the hose downward it slides perfectly into the turbo without any tools and fits way better. I wanted to comment this for anyone who might run into the same issue. The version 3 is absolutely worth the money.
wish i saw this earlier. just installed it an hour ago and besides the cheap clamps gettin the turbo back on the intercooler was probably the most difficult part
For real! I’ve got a 2017 STI that I’m getting ready to put the AOS On. Totally dreading the intercooler. I had to mess the with intercooler awhile back…. It was such a pain. I’ll try your tip tho!
I have a 2016 also and will be installing myself. What exactly was different from what was shown in the video?
Im stuck at this point. Do you mean you rotated the hose on the intercooler slightly?
WD-40 or Vaseline would make it easier to slip on
Bout to do the install in a day or two. I have watched this video 3-4 times already, and will watch a few more times before doing the install. I have all tools ready to go, and am excited to get this on the car. My 2011 wrx had cylinder 4 compression issues, and I didn’t care for it as I should’ve, and definitely learned my lesson on what is needed for these cars to be healthy. I traded it in for a new 2020 STI that ive kept completely stock thus far. This video should be exactly what I need to understand the process more thoroughly.
Thank you IAG, for providing this video. I understand most shops charge quite a bit for this so i decided to give it a go myself.
I’ll let you guys know how it came out after I’ve finished the install. Next up after this is the cylinder 4 coolant mod, along with a Koyo aluminum radiator. Only then can I be comfortable doing performance upgrades down the road, as this is a daily driver that id like to keep healthy over its lifetime…
Alright guys, I’m taking a break. I’m at the point of reinstalling the intercooler, but having some issues with fitment. Should be able to get it on with some patience.
I struggled to get the yfitting on to the block where the oil returns from the aos, that took me the longest to get right. Hard to see down there and I couldn’t get my throttle body to move quite as far to the side as they showed in video.
The other parts that took the longest we’re getting the clamps all set right. Some of the steps took me longer than I was hoping, and I had more coolant leak than I would’ve liked. I’m sure I’ll get some smoke on start up due to that. I’ll come back after I get some rest and get the IC reinstalled. I hope to have the car running by this afternoon. I’m hoping it’s all solid and there’s no leaks on start up. I’ll have to add some coolant but that’s fine and was planned for.
@@coryanderson5210congrats on your progress! Would love to hear if you’re finished now. I’m over halfway through and yes the y fitting was killing me. I found out you can re use the OEM rubber fitting that’s the same size and it goes on much easier but is still very secure!
@@coryanderson5210 How did it go?
I couldn’t get the TMIC back on, due to the new tubing that ran under it. Followed instructions, and tried a few different things but couldn’t get it to fit so I just took it all off and returned the car back to stock.
It’s not what you all want to hear, but I’m just gonna keep this car stock at this point. There’s more important things in life right now to take care of than to spend time and money messing with my perfectly fine running car.
@@coryanderson5210 That sucks. I wouldn't give up, maybe take it to a mechanic and work on it with them or something. Or perhaps you need a couple more special tools to help you get it done. You could also just get a catch can instead which I believe is easier to install. Even without either of those, your car will run just fine, its not a big deal.
THANK YOU FOR THIS IAG! Doing the install right now and had so much trouble getting the Y hose on the block.. If you’re having trouble as well, I saw a comment that said to reuse the OEM hose and I did so and slipped right on with OEM clamp.
You’re a godsend
Putting my 2 cents in. Clip the Y pipe to the block AFTER putting the hose on, as long as you have some long needle nose.
Use worm gear clamps where possible, particularly on the hose that drains coolant into the turbo feed. My provided clamp allowed it to leak.
Also, if you are using a FMIC, just remove that bracket they tell you to feed the hose through the hole of. It is only used for supporting the TMIC. It will free up space and make getting the intercooler to turbo coupler on much easier.
This happened to me also. I had to run to wal mart to get clamps. I ended up using the one they provide it and a worm gear clamps. Just to make sure it wasn’t leaking because I was tired of taking off the TMIC.
This is in my opinion the best attention to detail video on The AOS. I own a 2020 base model WRX/STI I was thinking about putting an IAG AOS on. Thank you IAG. A great video. Subies forever guys and gals.
Thanks Paul!
This is how all instalation videos should be
Definitely a great vid. I have 2 of these to install in the near future, once my '19 STI is delivered, and parked next to Wifey's '20!
Halfway through the install currently, will update when done! So far going smooth, biggest install for me ever so I’m taking my time and making sure it’s right!
One note: when you go to put your Y splitter in consider re using the OEM hose the same size, it fits so much better and you won’t break the fitting or your hand trying to put it in, lol! There’s a video someone linked where the guy shows using the stock hose instead of the one provided by IAG!
Update: I am done! Everything is back together and running good! By far the worst part was getting the intercooler back on… the turbo hose connection will make you go insane! You need a lot of lube/grease and a nice long pick to help guide it on! Very challenging yet rewarding once everything is together. I bled the system, now I need to add some coolant back but other than that I’m ready to ride’
Did u spill any coolant?
@@UpstateSTI yes. It’s hard not to when disconnecting the lines unfortunately. It wasn’t a lot though and I added back some to level it out!
@@andysmith9243 does it smoke white from engine?
@@UpstateSTI oh no… that could be a deeper issue with your coolant system
7:08 A buddy and I started on this today. Tried all sorts of things to get that breather hose with the pre clamped clamps to go on. Nothing would work. We ended up having to slide the small hose fitting on and then carefully lower the clamp down with hose pliers and clamp it. We spent probably 4 hours trying to do it, and broke the y fitting in the process. Good luck.
For those who are wondering about the 2017 Sti install.
Depending if is IAG v2 or v3 Install will be slightly different.
I installed V3 on my STI so I kinda followed some part of this video but you have to see the other video from this guy BOOST AND SHUTTER.. he explains how to install on 2017 STI but the problem with THAT video is that he is installing a V2 instead of the V3....
once you get to the part of installing all hoses, you gotta SWITCH to this video.
Im telling you this because I did mine like this and it was perfect install. If I had someone tell me this before I wouldn't have taken 5 hours to install mine.
If any one has any question, just reply. I know what it is to ask questions on all these youtube videos and they answer a month later 🙄🙄
Cheers🎉
Going to try this , this weekend on my 2017 sti , any advice other then what you stated ? I had my TMIC off to change the PCV valve, but all the added hoses from the AOS makes it look hard for the TMIC to fit , is it save for the hoses to touch the inter cooler ? And did you use the sliver heat sleeves
@@mikeyrov5230 hi man!
Yes I used the silver shields on the hoses...
It is ok for hose to touch the intercooler as long as the hoses are not crimped...
Make sure all Hoses connected to the COOLANT tubes have a hose clamp preferably a Screw clamp because it seems like the hoses that come with the AOS is slightly bigger and you will get a small leak.
@@mikeyrov5230 also search on a separate video on how to install TMIC easy. It was the only video I found that made it easy to put back the TMIC because it is difficult! Honestly the hardest part of the whole process...
Make sure to cut all hoses that go behind the TMIC longer so they dont create tension when trying to put TMIC back...
If any other questions let me know!
@@mikeyrov5230 ohhh! Last thing. If you are considering installing an engine bay STRUT BAR (Perrin) you much install AOS tank lowest possible because if not then your strut bar wont fit... I had to return mine because of this...
Hope I helped you. LMK!
@@Juanparrastudio thank you man , shooting for this weekend to install , got my Amazon cat full , AOS and extra supplies
Excellent instructions, your guy's production quality is top notch!
Much appreciated!
@@theiagchannel hoping you got demo for wrx fa20 2015+ thanks in advance.
Great product and video, it just walked me through the install without any issues! Well done!
How did you get the Y fitting back into the engine bay without breaking it?
Better than the instructions from your IAG AOS PDF 👏🏽
Glad it was helpful!
@@theiagchannel I wish you guys had this video last year 😃. I struggled but prevailed 👍🏽
The two coolant hoses installed, from the can Frist is it the left hose on the can that goes to the the coolant expansion tank and the right hose from the can that goes to the turbo inlet hose ? Or is the order from the can not matter
EDIt : Found the answer , coolant lines from AOS can go either way to the expansion tank / turbo inlet
Very detailed video. I definitely needed to see this before installing my AOS. Thank you guys for this amazing step by step video!
Thanks Naiyel!
@@theiagchannel the 2 hoses from bottom iag tank the coolant wich one connects to top and lower or it doesnt matter
IAG, you need to come up with a better solution for installing the Y-fitting. It took me 5 hours, help from my dad, and several trips to the store to get that thing on the block. I ended up buying a new hose and used worm gear clamps to get it to go on. There is zero percent chance of that thing going on the block after you've clamped the bottom of it.
What did you end up doing ? Haven’t tired the install yet but I changed my PCV valve not long ago and the bottom clamp was impossible to get tight
@@mikeyrov5230 I ended up buying a new hose because I mangled the one that came with the kit. It's just regular hose you can get at any auto store. I used 2 worm gear clamps and my dad was actually the one to get those on tight, I don't know how he ended up fitting a socket wrench in there to do it but he did. I pulled up on the Y-fitting pretty hard to test how tight it was and it didn't budge.
@@andrewknutson91 damn , yeah that’s such a tight spot , seems impossible to get a wrench on , gives me hope tho haha I’ll have to have extra clamps / hoses.
If you break that little piece of crappy plastic, it is 23.61 with shipping to replace. I can’t recommend this product until they rectify this obvious problem.
Currently stuck at putting the inter cooler back in. Pipe for turbo will not slip back on no matter what tool I use to help the bottom lip go over, it will not fully go in flush.
Awesome video, up until now I was a bit concerned about doing this myself, you have aleviated all of my concerns. I live in California and have to have a CARB executive order approved Air Oil Separator, I believe IAG and Cobb teamed up and the Cobb unit is basically the IAG unit with rebranding and a Cobb certification. If this is true, this video just sealed the deal. Thanks again.
Bravo guys!! Really well executed install video.
Thank you very much!
Where do you connect the competition series hose?… also, I love the video, finally a step by step on a 2018 STI☺️
I think you should start making the Y fittings metal, mine just broke during installation
Damn hulk how? Lol
@@R3spectTheV3tmine did too, it’s really cheap plastic
Super simple easy to follow tutorial. Preparing to install mine tomorrow!
Good luck!
underneath the cannister theres 2 hoses which one that goes to top to coolant reservoir ?
if anyones having trouble with the intercooler removal he forgot to mention to loosen the red hose connected to turbo
Also you will have 3 bolts leftover that connected to wiring harness bracket and pcv valve brackets attached to intercooler! Also wondering if the coolant lines order matter? I had right plug installed to further right coolant line and left to left. Im thinking it should be okay if i mixed it up but he never mentioned it. Great tutorial vid besides that!
He actually mentioned it，he does not say red hose，he said loose turbo inlet which is the red hose you mention
Word of warning to those such as myself that live in cold climates. If you drive your car for extended periods (NOT stop and go) in extreme cold, the AOS lines WILL freeze. I'm currently thawing out my entire PCV and intake system. I want to emphasize that this is NOT, I repeat, NOT a problem with the AOS, it is an inherent issue with the location of the PCV and the intercooler on WRX's. The cold air blows through the intercooler, directly onto the PCV lines. Over time, this will cause the moisture (water) in your system to freeze and create crankcase pressure which will push oil into your intake, and possibly blow your dipstick out, which blows oil into the engine bay. One fix that I will try is to put cardboard over the intercooler to try to keep temps in the engine bay high enough to prevent freezing.
This does not seem to be a problem with people that drive in stop-and-go conditions, it only really affects those that are driving on highways/interstates for prolonged periods.
Where do you live ? And how cold we talking ? Below 10 degrees?
@@mikeyrov5230 Great Plains region in the U.S. We can regularly see -20 to -30 F before wind chill in the winter. I did cover my intercooler and surrounding areas with cardboard this last winter, and that helped to prevent the lines from icing up.
@@garyburrus9379 oh wow that’s cold lol, I might be safe then , we don’t see below zero much
@@mikeyrov5230 You should be good, it's really only a problem once the temps are below zero and you are driving at a consistent speed for a long time.
I spilt a lot of the fluid coolant? I added more, but it went down my engine. And now it’s smoking when hot! Is that just burning off the spill????? Please help? Thank you.
If you spilled coolant on the exhaust it's going to take a little while to burn off. Keep an eye on your coolant levels and if it doesn't go away in a few days investigate for any leaks.
did anyone else have an issue putting those thick short hose in with Y-pipe into the block? 7:12 my Y pipe broken on me while installing attempting to put it on trying to wiggle it around.. trying to figure out how im going to just get that Y-pipe replaced. literally just bought the iag v3 street from flatiron tuning. any suggestions?
i did the same thing lol now i’m fucked until the replacement comes. no idea how they got that on so easy i tried everything and used lube
Great video 👍
This new set up you don’t have to pull breather lines from the valve cover? This version seems a lot easy than the other models.
Great video I'll be installing mine this week, just wondering which coolant hose goes to the reservoir and which goes to the turbo
Thanks! You can hook them up to wherever they fit best. The order does not matter.
USE THE OLD 2 INCH PIECE OF TUBE AND CLAMPS FOR THE Y CONNECTOR!
With the 3 hoses attached to the bottom of the aos, which goes to which?
This may be a stupid question but what type of lubricant is he using?
7:30
Stamp for where he mounts the can to the chassis
Very intuitive , great video quality also , now , any video installation with the street competition kit with this oil separator?
Not yet
I wish you had this detailed of a video for wrx (fa20)
We just posted the FA20 AOS installation video.
th-cam.com/video/HHlK7lZuZpE/w-d-xo.html
I need help, at 11:40 when he connects the hose to the expansion tank. is that the bottom left hose on the can? and then at 12:00 i'm assuming that's the bottom right hose of the can? the video and the instruction manual doesn't say, and the only closes picture in the manual that kind of shows is on page 48 step 94. it highlights the 2 hose, but's its still a little hard to tell which one goes where.
Does the 2018+ not need the breather hoses on valve covers to be modified? I am done installing all my hoses(per the video) (struggling to get intercooler back on), but I have extra t-fittings still?
Without aa doubt an install I'd do once I reach closer to the end of my cars warranty, however my car is RHD meaning the unit would sit on the other side of the engine bay, is there any install videos or instructions for Right hand drive cars? or for the least do you guys sell the same kit to Australia with extra hosing?
Can you make a video for installing the oil pan.
Hi. I just purchased the V3 IAG AOS and I can’t seem to put the one hose onto the middle vent hole or whatever it’s called. I followed your video and it doesn’t seem to go on fully with the clamp on.
It's a pretty tight fit, but if you apply a little lube it will go on.
I did but it won’t go over the pre installed hose clamp
@@jacobbalatbat153 We promise, it will. You just have to push harder.
was wondering if anyone had issues with this location for the AOS? I had an AOS installed here recently and now I cannot fit my perrin strut tower brace because the AOS is in the way
I fucking hate how easy he make everything look
Amazing❤
my car doesn’t turn on after the install i did everything in the video and checked everything to make sure it’s tight
I would reach out to our support team at support@iagperformance.com for some help!
11:07 is it ok to attach either coolant hose on either side of that coolant attachment? or is there a specific coolant hose for each side, for example the left coolant hose (from the AOS) goes to the top, right coolant hose goes to the bottom
Sorry for the late reply, but yes you can attach the hose to either port. The coolant simply flows into the AOS chamber. The direction does not matter.
Why do people on TH-cam make it seem harder than it is shown on this video when installing it
Bought my 15 Sti from a pre-owned dealership. Installing this but already stuck. How come mine doesn't have the single black connector (pcv plug) on the crossoever pipe at the drivers side?
It already has a bunch of mods on it with flex fuel etc. Any help appreciated.
Hi do you still need to remove the electrical jumper from the pcv connection and install it to the sensor?
Is there a video for installing on a 2014? If not I'll volunteer mine for the video 😉👍🏾
We are planning on it, but do not have one currently!
Still waiting on that 2014
Video for a ej series engine like the 04 sti / Forester XT?
Coming soon!
The hardest part of all of this is installing the tmic again.. the bottom side stock hose does NOT want to go onto the turbo easily.ever
BRO THANK YOU! I left my STI in pieces tonight as I can't get my fucking intercooler back on
So I just installed mine step by step, but i hear a hiss near the throttle body. Took the intercooler off again to check all my hoses and I can't find anything loose. When i give it a slight throttle the hiss stops but the car dies
We'd recommend getting a smoke test performed to locate the source of the leak. A few common places would be the intercooler couplers or the PCV hose under the throttlebody.
Will you guys increase the inner diameter of the 2” breather tube just a tad? I install these kits regularly and that tube always gives me a headache getting the y fitting in and the tube onto the block.
It is definitely the more difficult part of the installation but with some lubricant there should be some ease.
I will be installing the AOS on my 2002 wrx. Are these instructions pretty similar for the most part? Not sure if theres any big differences considering the year. Thanks in advance!
You'll want to follow the written instructions on our site for the 06+ WRX models, but the basic idea is the same. You'll also need to follow our instructions for relocating your cruise control module.
I wished the written instructions would have mentioned which clamps to use for the coolant line...would have saved me from pulling cooler again. TH-cam FTW I suppose.
So thankful for this vid. Finally a v3 install. Smooth as butter now
Thanks for the video; follow everything to a T, with one exception. That new drain hose with clamps that goes under the turbo / but the throttle body. There was no way I could get that on. Tried for 45 minutes and wouldn't budge. I watched this video (th-cam.com/video/vVFrBlO8FxQ/w-d-xo.html), where the guy re-used his factory hose and that's how I ended up getting all of this to work. Other than that, fantastic video and fairly straightforward install. Took my son and I about 3 1/2 hours from start to finish. Local Subi shop quoted me about $676 to install at 4 hours of install time, so I figured I'd see about installing it myself. After watching this video and the other one I posted, I was confident that I could do this (and I am no mechanic, by any means).
Thank you for that. I had originally watched the other video to get prepared and I forgot he re used that OEM hose for the y fitting! I was dying until I found that out, thank you so much! It slipped on nicely once I did this.
Installing iag Aos street series on a 🇦🇺 wrx 13 with you iag stage two tuff! Emission laws are much different here! Do I need check valves for the two turbo inlet breather hoses?
We can't speak to your local emissions laws, but additional check valves are not usually required. If the vehicle has PCV flow sensors you should keep them in position when installing the AOS.
Is it the same for the RHD market? Ive been asking channels for a while but never given an answer.
Thank you!
No, this product is designed for LHD. It can be made to work with a custom bracket and hoses, though.
whats the hook up for 2015 sti?!?!?! I read in the comments its connecting the two vent hoses directly to the front most valve cover vents... but where is this stated from IAG in instructions!! The only instructions IAG has for 2015-2017 sti is the exact same instructions from 18-20 sti becasue its all under the exact same install manual. Yet the comments say otherwise. SO IAG WHAT IS IT?? Do I do what you guys have said multiple times in the comments or do i follow your 15-20 IAG aos v3 install manual?? and if it is whats in the comments.. where do I find that info from IAG directly!!!
Would I install this the same way on my 2021 sti ? Amazing video by the way.
Yes, you would install it the same on a 2021.
@@theiagchannel what about 2015?
Can I burp the coolant system with a burping funnel instead of the bleeder bolt? Does it make a difference which way I do it?
What’s the size Allen key on the bottom bolts that come pre assembled? Mine are leaking
Mines didn’t last long as it started leaking from the upper portion of the canister. They sent me new seals to rebuild it but it still leaks, but not as bad as before. But a coolant leak is never good no matter what.
Can I follow this same instructions for a 2017 ?!
They will be pretty close.
Everything in the beginning of the video that you said to disconnect is nonexistent in my 2015 STI… there’s literally nothing for me to disconnect… I’m so confused
This video is for 2018+. Some STI models do not have the same connectors, consider it lucky that nothing needs extra disconnecting :)
That Y fitting is impossible to get on
On the 2002 what do I do with the open case hole just below the throttle body??
Currently have a 12 STi. Would this work?
How much would differ for the 2015-2017 models?
The main difference is where the vent hoses attach. The 15-17 will need to run 2 of the vent hoses directly to the forward most valve cover ports instead of intersecting with the white PCV connectors. Removal of the airbox portion of your intake and battery may be needed to reach those ports.
@@BuckleUpGarage_ exactly. We're working on getting a bone-stock 15-17 in here to finish instructions and we'll have those posted up in a few weeks as well!
Impossible to get Y pipe on to the block with the clamp on. Applying enough pressure to get the hose on just pushes the clap up the hose. Any suggestions?
Same issue. Not sure why they have you tighten the spring clamp before applying it to the block. Works best if you tighten after it’s on. I ended up having to use another clamp.
When installing mine, I just used one of the zip ties that it came with to tighten that lower hose.
I reused the OEM hose
Witting Shore
Who's got a video of installing this on a 2005-2009 Legacy GT/Outback XT?
I didn't know there's a hose to be connected to the intake manifold, or am I wrong?
The street series AOS does connect to the intake manifold.
I accidentally bought the STI AOS but can I still use it on my WRX 17 ?
No, the hoses and connections are different. You'll need to exchange it.
hi, PCV sensor is missing on EU German car, ist this a problem for installation or just to skip this step ?
How long should this take a mechanic from subaru to do? Mine said close to 3 hrs which I think is milking it
The standard install time is around 3 hours
The part at 11:20, does it matter which hose to use for these spots. The guy doesn't clarify which one is which. Please help.
Either one is good!
Is this the same install for the 2015 sti
How long does it take for coolant to start coming out?
I ordered this kit but tit not receive no y pipe fitting is there a by bass to this
Please email support@iagperformance.com and we can get you sorted.
My IAG AOS didn’t came with heat sleeves at all should I be worry? didn’t even know I was missing that.
What AOS kit did you buy? FA20 WRX? Not all kits come with them.
@@theiagchannel IAG V3 Street series for a 2018 sti. (IAG-ENG-7151)
@@theiagchannel bought it back in June of 2020 and I just got it installed.
Runolfsson Oval
The 2 coolant lines from iag tanl ..which one goes to the top and lower ?or it doesnt matter as long 1 goes to each side of the car coolant lines?
The orientation does not matter, just install them in the way they fit best in your engine bay.
Thank You so much
What sizes hose and claps goes on y fitting
Can I use the same guide with a 2015 sti?
Hi, I just wondering if install it the position, does impact a strut bar
Our AOS does not have confirmed fitment with any strut bar.
What makes this different then catch can
An air/oil separator no longer requires any maintenance like draining or checking if it is full.
Will you recommend a location that I can install it in a JDM (right-hand-drive) wrx sti?
Also need this
same here I would like to know, been looking into this for very long, I've read that its the same sort of install with the unit on the other side obviously, some issues people faced in this case was the need for extra hosing
@@subaruej2079 I've just written hope it helps somewhat, I'm still not fully satisfied to go ahead with it though until I know for sure
Is this the same steps for the Cobb version? I’ve read they use your guys with a different paint job.
They are very similar! You can use these instructions!
Is there an benefit connecting the 2 PCV hoses to the Blow By sensor white connectors versus connecting the 2 hoses directly to the block like IAG used to instruct to?
If there is enough length on the hoses, you should be able to connect directly to the block as long as you jumper the PCV diag connectors to suppress the CEL. I've not seen the older instructions, but I'm guessing that these new instructions are more EPA friendly since they keep the diag connectors intact. I'm going to perform the install this weekend on a 2017 STI and I'm considering going straight to the block.
@@satsun Thanks for your input satsun. I ran them straight to the block with no issues using the jumper method. I am just curious if the Blow By sensors are important to the operation of the engine since not all systems are 100% efficient and some blow by will still make its way into the block.
If you are still top mount intercooler that was the most annoying part of the install tbh. Other than that everything is straight forward. I suggest printing out the instructions in color, watch this video, and take your time. Good luck!
@@trnql_noir Those connectors don't sense anything regarding the content of the lines, they're called 'PCV diagnosis connectors'. Their only purpose is to throw a CEL when the connection between the two parts is open. That's why it's easy to circumvent them. No operational impact by removing them.
Glad you were able to run straight to the block. I'll do the same to eliminate those bulky connectors.
@@satsun I wonder why Subaru even implemented these sensors then. Emissions maybe? In my opinions its probably cleaner if you just keep the sensors connected so you do not have loose connectors dangling around.
I have been debating whether I should go back and reinstall the OEM hose and sensors since I do not really see any downsides of keeping them. I thought maybe flow may be restricted but I really doubt it. What are your thoughts?
@@trnql_noir I've already done some of the connectors, I used electrical tape to cover the exposed part of the connector so it doesn't get dirty and then zip-tied the connector to the wire harness or something nearby to keep it from hanging loose.
They are either for emissions requirements or they're in place because certain PCV lines need to be modular for serviceability, so if part of the PCV system gets knocked loose then there's a system in place (CEL) to notify you of the problem.
Does it matter which PCV vent (passenger/driver side) goes to the top or middle of the AOS ports?
I’m wondering the same thing as I am literally installing right now
Which one connects to what for the 2 coolant hoses at the bottom of the AOS?
The order does not matter for those hoses. Install them in whichever way fits best on your vehicle.
On the 2 swivel hoses on the bottom of the AOS, which hose goes to what? It looks like the hose closer to the strut goes to the top coolant reservoir and the one closest to the wire harness to the other coolant line. Is that the right placement?
Yes that is fine! They can be interchanged but we found this routing best.
Does it matter which PCV vent (passenger/driver side) goes to the top or middle of the AOS ports?
Would this also work for a wrx 2019.
We have a specific AOS kit for the 19 WRX, listed here : th-cam.com/video/HHlK7lZuZpE/w-d-xo.html