Installation Instructions
Contents
1. Air Oil Separator for 02 07 WRX STI Top Mounted Intercooler Setups 2015 01 05 Thank you for purchasing this PERRIN product for your car Installation of this product should only be performed by persons experienced with installation of aftermarket performance parts and proper operation of high performance vehicles If vehicle needs to be raised off the ground for installation the installer must use proper jacks jack stands and or a professional vehicle hoist for safety of the installer and to protect property If the vehicle is lifted improperly serious injury or death may occur Please read through all instructions before performing any portion of installation If you have any questions please contact our tech department prior to starting installation We can be reached in any of the following methods Email Tech PERRINperformance com Instant Chat off the main page of www PERRINperformance com Or simply call our tech team at 503 693 1702 GENERAL MODIFICATION NOTE Modifications to any vehicle can change the handling and performance As with any vehicle extreme care must be used to prevent loss of control or roll over during sharp turns or abrupt maneuvers Always wear seat belts and drive safely recognizing that reduced speeds and specialized driving techniques may be required Failure to drive a vehicle safely may result in serious injury or death Do not drive a vehicle unless you are familiar with its unique handling characteristics and are c2. cover to center crank case vent then to right valve cover These sets of hoses vents are considered the balance hoses and are to be left alone DO NOT remove or tee into these hoses b Once proper set of valve cover vents are located decide if you want to i Use OEM piping on top mounted intercooler as the T connection and use only one of the two AOS valve cover inlet ports This is the simplest and cleanest method Shown below in picture of AOS in engine bay Continue to Step c below ii Join both valve cover vents using supplied T or Y connector replacing all OEM hoses with supplied 1 2 emissions hose and using only one valve cover vent inlet port on AOS This method is preferred if OEM hoses are old and hard or aftermarket parts may be installed affecting installation Shown below in picture of AOS on engine stand Continue to Step e below iii Connect each valve cover vent separately to each of the AOS valve cover vent inlet ports This method is what we recommend to provide the best venting while under high lateral G forces If connecting each vent separately skip to step h c Ifyou using the OEM piping on top mounted intercooler as your T connection install 1 supplied black plastic 1 2 barbed 3 8NPT straight fitting into one of the AOS valve cover vent inlets Install supplied black plastic 3 8NPT plug into remaining valve cover vent inlet See NPT Notes above regarding installation of th
3. of Y connector After AOS is completely installed double check that all hoses and vacuum lines are connected and secured using a clamp Any leak in the system can cause the engine to run poorly and will lead to unsafe engine conditions Check that all bolts and hardware securing AOS are tightened down Reconnect throttle body to intake manifold NOTE Gasket can be reused if it was not damaged during installation Using supplied zip ties secure wire harness removed in earlier step toward shock tower or frame rail NOTE Keep away from turbo charger to ensure no damage from heat occurs Using supplied zip ties secure emissions hoses to engine and other hoses to reduce the chance of abrasion wearing down hoses over time Reinstall intercooler pipes removed earlier and start car Ensure its running as it was before Turn off engine and add any coolant that was lost during installation Restart engine and take car for test drive If car is misfiring or check engine light occurs recheck all aspects of install After roughly 10 minutes of driving recheck all fittings for signs of leaking If leaks are found stop and fix ASAP Maintaining your Air Oil Separator There is very little maintenance required with the PERRIN AOS From time to time you may want to remove it and clean out some of the oil from the inside Before taking apart take note or mark orientation of AOS bottom to the body Remove bolt in bottom of AOS using an M5 wrench an
4. 8 NPT 5 16 90 Degree Barb Plastic Fitting e 1 1 8NPT 5 16 90 Degree Barb Nickel Plated Fitting e 2 1 8 NPT 5 16 Straight Barb Nickel Plated Fitting e 2 1 2 Y Plastic Connector e 1 1 2 Tee Plastic Connector e 2 1 2 1 2 Plastic Connector e 1 5 16 5 16 Plastic Connector e 3 3 8 NPT Plug e 2 1 4 NPT Plug e 1 M10x80mm Hex Bolt e 1 M10 Nut e 8 3 8 Washers e 3 M8x16mm Button Head Cap Screw e 3 M8 SS Washers e 2 M6x14mm Button Head Cap Screw e 2 M6 SS Washer e 1 M4 Hex Wrench e 1 M5 Hex Wrench e 1 M6 Hex Wrench e 20 Zip Ties Air Oil Separator Outlet Left and Right _ gt ae Valve Cover wa Crank Case Vent Inlets Vent Inlet Coolant Inlet Outlet Installation Instructions 1 Using the above diagram as a guide take note of all fittings and our recommended connections There are many options and many ways to install this Please read through all instructions before proceeding with install Locate and remove intercooler including Y pipe and throttle body coupler from engine or any boost tubes connected to turbo and throttle body This is necessary to gain access to center crank case vent PCV system and other items 3 Moun tung The placement of the AOS needs to meet two main criteria First the oil drain port needs to be higher than the engine port used for draining oil back into the engine As long as this is mounted higher AOS will drain prop
5. M PCV into female barb fitting e Install supplied 1 2 barb 3 8NPT 90 degree black plastic connector into top of AOS See NPT Notes above regarding installation of this fitting E B uee Pe eos So a f Locate previous PCV vacuum connection on intake manifold under throttle body The diagram above shows where you will find either a 3 8 fitting or PCV valve threaded into manifold Diagram above shown i For 2002 03 WRX s connect supplied 1 2 emissions hose over PCV valve This is a tight fit and will require a bit of stretching of hose as well as some force to push it over larger fitting Use supplied 3 clamp to secure Do not cut hose to length at this time ii For other models connect supplied 3 8 fuel hose to fitting and secure with 3 clamp Do not cut hose to length at this time g Using supplied 1 2 emissions hose connect AOS outlet top fitting to intake vacuum source at turbo inlet hose i For 2002 11 models cut OEM rubber vacuum hose after bends Use supplied 1 2 1 2 black plastic connector to join OEM rubber hose to 1 2 emissions hose See diagram below Cut OEM Hose Here and Install 1 2 Connector 2002 07 WRX 2004 11 STI Vacuum Source Connection On Inlet Hose For 2012 models remove OEM rubber vacuum hose at white PCV diagnosis connector and connect 1 2 emissions hose to fitting See example diagram below Remove OEM Hose From 2012 STI Vacuum Sou
6. agram shows simplified path to help n visualize routing Install remaining 5 16 coolant hose to 5 16 fitting on AOS bottom and secure with supplied 2 clamp Route hose back to fitting left open on throttle body and secure with supplied 2 hose clamp NOTE This is the final step that may affect the orientation of AOS bottom It is now ok to follow procedures to seal bottom with RTV in next step Using above diagram you can see the coolant hose connections for all cars This diagram has been simplified to show the hose routing Hoses can be routed differently depending on where the AOS is mounted or if intercooler plumbing requires this Keep in mind that the coolant fittings on the AOS become part of the coolant path from engine to throttle body 6 ASSEMD Y and RTV O Each AOS is assembled with M5 bolt nylon seal and special quad seal O ring placed around bottom for packaging purposes In order to ensure your AOS has an oil tight seal it is necessary to apply a small bead of silicone RTV around bottom as shown below NOTE This step can NOT be done until orientation rotation of bottom has been determined Further instructions will be given to reference these steps further into installation Make sure orientation is set before proceeding Once desired orientation for bottom is set remove M5 bolt from bottom making sure to keep track of black nylon seal Mark orientation of bottom with can using tape or grease type pen Remove botto
7. ank Case On Engine Block Picture above shows typical 2002 07 WRX and 2004 STI PCV Junction 2002 2003 WRX does not have PCV diagnosis connector d Locate and remove throttle body from intake manifold for better access to crank case vent and PCV connection Using diagram below locate OEM PCV crank case vent junction and remove from engine turbo inlet hose and intake manifold Take note of intake manifold connection as you need to connect a fitting or hose to this in a later step NOTE When removing PCV Junction on 2004 STI and 2005 WRX models there is a PCV diagnosis connector with an electrical connection where hose meets the turbo inlet hose Only remove hose from PCV diagnosis connector leaving it and electrical connection connected to turbo inlet hose Remove Rubber Hose Leaving PCV Diagnosis Connector PCV Junction On ye a Engine Block j PCV Hose we TE Above picture shows 2008 STI with PCV junction exposed Connector In Place e Using supplied 1 2 vacuum cap plug open connection on turbo inlet hose or PCV diagnosis connection nipple on newer cars NOTE It is important to ensure there are no vacuum leaks in turbo inlet hose after this step is complete This will cause a lean condition and lead to engine damage f If short rubber hose 3 4 1D x 2 long was pulled off from crank case in above step remove from OEM PCV junction and reinstall to engine block as this is used to connec
8. d twist bottom while pulling to break free RTV seal Remove bottom from AOS Body Using a biodegradable degreaser liberally spray inside can and let it sit for a few minutes Wash out with warm water until inside of AOS is clean and free of oil Remove special quad type O ring from bottom and thoroughly degrease using biodegradable degreaser Note Do NOT use brake cleaner to clean O ring as damage may occur Inspect o ring remove any RTV from it and if damaged replace with new included extra O ring used for maintenance Additionally these can be purchased through PERRIN performance or through one of our dealers Using a strong degreaser or brake cleaner sprayed onto a rag wipe around inside of lower portion of AOS body and over AOS bottom to remove any leftover oil or contaminants Install O ring into groove on bottom after brake cleaner has evaporated Note If brake cleaner is left on bottom damage to O ring can occur Using supplied RTV silicone compound and instructions above re seal lower connection Note Make sure there is no oil or grease on O ring bottom and lower section of body before following re sealing instructions from above steps Fran Case Vent Hook Up for Race Cars Cars with Loosely Built Engines We have found that to help control oil entering the AOS you can alternatively remove the crank case vent hose from the system leaving only valve cover vents to do the job of venting crank case pressures e Consult your tune
9. d you have excessive of blow by and or smoking from car after this done we recommend reinstalling PCV system as described above Questions Comments and Suggestions Contact Tech PERRINperformance com Visit Our Website for Instant Chat Options at www PERRINperformance com Call Our Tech Team at 503 693 1702
10. ector and secure with supplied clamps See diagram below showing Y connector being used NOTE We recommend removing all OEM rubber valve cover vent hoses as they become very brittle over time g Connect third leg of Y or T to 1 2 fitting used on AOS valve cover vent inlet port You can see in the below diagram typical routing found on the most common setups Continue onto Step 8 NOTE Make sure that the routing of hoses do not interfere with moving parts or travel over extremely hot parts like a turbo or downpipe Valve Cover Vent Routing Using Y or T Junction Using Single Valve Cover Vent Inlet Actual routing of hoses ma not be represented above IT shows simplified path to help visualize routing If you are connecting each valve cover vent separately to the AOS install 1 supplied black plastic 1 2 barbed 3 8NPT straight fittings into each of the valve cover vent inlet ports See NPT Notes above regarding installation of this fitting Remove all OEM rubber valve cover vent hoses and OEM steel piping on top mounted intercooler Using supplied 1 2 emissions hose connect each valve cover vent to each of the 1 2 fittings installed into the AOS valve cover vent inlet ports Secure with supplied 3 hose clamps NOTE Make sure that the routing of hoses do not interfere with moving parts or travel over extremely hot parts like turbo or downpipe 8 Outlet and PCV Connection a d The AOS o
11. ee fitting on PERRIN crank case vent junction Secure both ends using supplied 2 Hose clamps NOTE It is very important to route this hose such that it NEVER travels uphill from bottom of AOS to crank case vent fitting Also during this step it is important to orient bottom so drain and the next step of installing coolant feed has the cleanest path to engine Again DO NOT seal AOS bottom to body until final orientation has been settled on Using diagram above and supplied 1 2 Emissions Hose connect 1 2 fitting on PERRIN crank case vent junction to 1 2 fitting on side of AOS The direction of this fitting is not critical and can be adjusted to fit your particular installation Use supplied 3 clamps to secure both ends NOTE Routing of this vent hose is not that important just makes sure it is not pinched off while traveling to AOS body For cars that see an extreme amount of high G s or an excessive amount of blow by we recommend a slightly different installation for the crank case vent hoses See special notes below for this 5 Coolant Feed Connections a Q The coolant connection is an optional hookup but we HIGHLY recommend connecting these up as they help reduce water vapor and sludge that can build up in AOS The easiest connection to get coolant from is the throttle body as all Subaru models have the same coolant connections on the throttle body that can be used Other connection points can be used as long as there is some coolan
12. erly Secondly AOS also needs to be mounted vertically like in above picture It will not function properly if mounted on its side or at an angle The supplied bracket is designed to allow AOS to fit on a car with Top Mount Intercooler installed This puts the AOS in the proper location for it to clear turbos intercoolers and other commonly installed parts Before proceeding to Step 4 test fit AOS in this location to ensure it clears boost tubes and any other components that might be installed a In ee Thad Towie Locate 2 M6 threaded holes in right side shock tower These will be used to mount the AOS bracket These are located in the same place on every chassis but will be covered up by different things depending on the year 02 05 WRX will need to remove and disable the cruise control actuator 06 WRX and STI need to remove small plastic plugs or stickers covering holes 2007 WRX and STI need to remove a bracket holding the engines wire harness plug to the chassis NOTE None of these items will be reinstalled In later step you will need to secure wire harness and plug away from turbo Install supplied mounting bracket to AOS body using supplied M8 button head screws and SS washers Slide AOS to the upper side of the slot to start with and tighten down kreas 7A Fa he 7 P a A a E m i WR Pate 2 i T AN With AOS mounted to bracket secure bracket to shock tower using supplied M6 bolts and SS washers NOTE Below pict
13. ese fittings Remove OEM rubber hose from T junction piping on top mounted intercooler and from turbo inlet hose Using supplied 1 2 emissions hose connect T junction to 1 2 fitting installed on AOS valve cover vent inlet port Continue to Step 8 pi if nmk jai TIN mid i prey Vida ie Ta Yh waa AARRE g ier ANIONI me LO ni aaa A LA itl rt ADININ APRETI fi PPEVPPEE EY PPP PAT RP PRR IEP TN gt i U E AANA rity ih ny P AN M py A PRET MT di saar AAAA BAARN aadA A AA wee aaaeei aana par TI ji nta Ken Re V eXoUlU ant m arti ae E TA A Ni mni N SIMA IS CMSPLIN eG tale A a The above setup shows a simple setup that uses the OEM valve cover vent piping that bolts to the top mounted intercooler If you are connecting each valve cover vent to the supplied Tee or Y junction then to the AOS as shown below install 1 supplied black plastic 1 2 barbed 3 8NPT straight fitting into one of the AOS valve cover vent inlets Install supplied black plastic 3 8NPT plug into remaining valve cover vent inlet See NPT Notes above regarding installation of this fitting f Remove all OEM valve cover vent hoses and piping on top mounted intercooler up to turbo inlet hose Install supplied 1 2 emissions hose onto each valve cover vent join left and right side with supplied Y or T conn
14. m of AOS from body by twisting and pulling slightly This can be a tight seal and working on it from both directions may be necessary Alternatively pull AOS bottom out of body roughly 1 8 to expose area to place RTV instead of removing completely This method also reduces the chance of damaging the O ring Using below picture for reference and supplied black RTV compound apply 1 16 to 1 8 Do not exceed 1 8 bead completely around bottom of AOS Note Try not to apply RTV on O ring only apply to bottom edge corner as shown Apply less than 1 8 Bead of Silicone RTV Around Entire Bottom Edge Carefully install bottom into body making sure quad type O ring isn t folded over or cut As bottom is pushed into body some RTV will spill out sides It is important to see this occur around entire bottom of AOS as this is what creates the oil tight seal g Remove excess around bottom with knife and let RTV cure for at least 1 hour During this time do NOT use on vehicle as any oil that passes through AOS can affect how RTV cures and may lead to a small leak 7 Valve Cover Vent Inlet Connections a Your Subaru engine has a valve cover vent on both left and right heads that need to be routed to the AOS The method for doing this can vary depending on the desired setup Special Note Most all models will appear to have two vents on each valve cover only one set of these are considered vents Locate vents that connect left valve
15. missions hose and install supplied Y connector making sure to aim 3rd leg back toward AOS away from Turbo Intake Vacuum source Use above and below diagrams to give you a better idea how this can be setup It is not critical as to the location of PCV valve itself It can be located close to intake manifold or right at AOS outlet and it will not affect how system works Turbo Intake Vacuum Source A f gt gt ei Ja SP CVAV gt PCV alve setup 02 03 WRX will NOT have PCV valve located at shown For 2002 03 WRX s connect 1 2 emissions hose coming off PCV valve threaded into manifold below throttle body to 3 leg of Y connector 7 5 Above diagram shows 04 07 WRX and 04 13 STI j Skip to Step 9 to continue installation k For all other models cut a piece of 1 2 emissions hose 2 is what is shown in pictures and install over 3rd leg of Y connector as shown in above and below diagrams Install 1 2 side of PCV valve assembly assembled earlier in step 8 into 1 2 emissions hose Install supplied clamp and tighten down on hose 10 11 12 13 14 15 es TO Intake Manifold La 19 gt l Route previously installed 3 8 fuel hose from intake manifold PCV fitting to 3 8 fitting on PCV valve Cut hose to length and secure hose with supplied clamps Using above diagram ensure that PCV valve one way valve is installed in the correct direction and on the correct leg
16. onfident of your ability to maintain control under all driving conditions Some modifications and combinations of modifications are not recommended and may not be permitted in your state or country Consult the owner s manual service manual instructions accompanying these products and local laws before purchasing and installing these modifications You are responsible for the legality and safety of the vehicle you modify using these components SPECIAL NOTES e Installation of this part should be performed by a qualified technician as this is a complicated and time consuming installation with many different steps and optional hook ups along the way e Read through entire installation before starting this project There is a decent amount of planning needed for hose routing and it is important to understand the full installation before beginning installation of the AOS Mainly to orient bottom of AOS before sealing it with RTV e We have provided a couple of methods on how to hook this up to your engine Keep in mind there are many variations of how this can be installed Consult your tuner or qualified technician before installing this part on your car to better determine how it should be setup on your vehicle e The PERRIN Air Oil Separator AOS was designed to remove a significant amount of the oil and water vapor that normally gets sent to your intake system to be ingested by your engine There are many variables as to how much oil will make it
17. past our AOS but expect it to remove a significant amount of the crank case blow by For cars with built engines with excessive blow by you may still experience oil getting past our Air Oil Separator If you ever need to clean out your Air Oil Separator simply remove M6 bolt from bottom and twist off bottom Use a degreaser like Simple Green and warm water to clean out Follow instructions below for further details e Pictures below will show both plastic and nickel plated fittings used in different locations Included with each AOS kit are a mixture of both for their specific uses We also offer an upgrade kit that includes nickel plated fittings and upgraded hose which is shown in pictures below as well See your dealer for more info NPT Notes e There are many NPT National Pipe Thread fittings included with your Air Oil Separator Throughout the instructions these notes below will be referred to and it s important to understand these types of fittings and how they work e NPT fittings are a tapered thread that seals when tightened not bottomed out Thread fittings in by hand and tighten roughly 1 2 to 1 full turn more until fitting is tight NOTE Using a small amount of Teflon tape on threads is a good idea to ensure a proper seal Teflon tape is rated to work up to 500F and is impervious to all chemicals that your AOS will see This is highly recommended to use over any other sealant e Angle of 90 degree fittings can be adjusted after
18. r to decide if this is the best setup for your car e Remove plastic fitting on AOS body used for crank case vent and install supplied 3 8NPT plug e Remove 1 2 fitting on PERRIN crank case vent junction and install supplied 1 4NPT plug e This turns the PERRIN crank case vent junction into a drain only for your AOS e You must ensure that left open vacuum ports on turbo intake system are plugged up if this method is chosen PT WA Rina Usack As OMIDEIMONI PCV Delete for Race Cars Cars with an Extreme Amount of Blow by e While we do not recommend this for street driven cars some racecars may want to disconnect the PCV side of the system This can cause long term issues on street driven cars and is not recommended For those who understand these risks and understand the reason for removing the PCV connection please follow the below alternate instructions e Locate port on intake manifold that PCV was hooked up to Remove fitting and install supplied 1 4NPT plug into manifold NOTE This is a tapered type of fitting and seals when tight not when bottomed out Take care in not over tightening fitting as this can damage intake manifold See NPT Notes above regarding installation of this fitting T 4NPT Port For PCV Connection located Bel ow Throttle Body e Using supplied 1 2 emissions hose connect AOS outlet to intake system somewhere before turbo and after air filter e Secure hoses with supplied hose clamps e If you fin
19. rce Valve Cover Vent Connection On Inlet Hose iii Vehicles with aftermarket turbo inlet hose will use one of the above installation methods depending on what is supplied with the inlet hose If installing with PERRIN inlet hose no additional fittings are needed NWN WW Wy ivi I ANN Mi mfi ij j i j ye ic i iN O P aana VTN saanane AAN A UN RANN POPPIN PRETEEN paper iii Pil ta SO aaar Ti aaa Papen ti ETN oe a Above picture shows intake vacuum source at turbo inlet hose on 2012 STI engine with extra PCV diagnosis connector h Decide where to install PCV valve one way valve and Y connector along 1 2 emissions hose coming from AOS outlet NOTE The location of this is not important as long as it s along the hose between the AOS top and the turbo intake system Below are a couple diagrams with different options as to where to make this junction ow eo AOS Outlet PCV Connection I i i f 4 y N it iit i aires A m am Thiet ti Gil yupo uuVUU pouU i ganna wi my yes Annan pst i i aiai iniit PE S i i eae anana ii iia oS VI a hk aii j ia neS Picture shows Y junction installed at AOS and PCV location PCV location does not need to be thi ni s close to AOS Once desired location is found cut 1 2 e
20. t PERRIN crank case vent adapter to engine block Remove upper pinch clamp from hose and loosely install supplied 27mm clamp g Using diagram below install supplied 5 16 90 degree black plastic fitting into PERRIN crank case vent adapter making sure to aim in the direction shown below or in a direction that allows oil to travel downhill from AOS bottom See NPT Notes above regarding installation of this fitting g k as A P af rE A 7 _ d TP 2 d d Le A r i age yt 4 eh i E pes oer T ee LOR K Kai J 4 v N P pe r ad P V fa f a ANA J A sT P r B Ne az 7 t ARA Ah h d 4 X AR le it A we Pf E _ 7 t 7 a H Crank Ce S Shown with optional nickel plated fittings from upgrade kit PSP ENG 608 Use black plastic connectors on these connections h Using diagram above install supplied 1 2 straight black plastic fitting into PERRIN crank case vent adapter See NPT Notes above regarding installation of this fitting i Install PERRIN crank case adapter into hose 3 4 ID x 2 Long on engine crank case vent and secure using supplied 27mm hose clamp Crank Case Vent Junction Crank Case Vent Inlet eE Oil Drain 7 Outlet A Actual routing of hoses may not be represented above Diagram shows simplified path to help visualize routing Using diagram above and supplied 5 16 fuel injection hose connect oil drain outlet on bottom of AOS to 5 16 90 degr
21. t flow through the hoses NOTE Installing coolant connection will cause some coolant loss and coolant spill Make sure to top off coolant after installation is complete 3 d 7 WS Whe v Picture above shows 04 STI throttle Body 02 05 WRX throttle body will appear slightly different Install supplied 5 16 straight nickel plated fittings into bottom coolant ports on AOS This fitting is NPT which is a tapered thread that seals when tightened not bottomed out Thread fittings in by hand and tighten roughly 1 2 to 1 full turn more until fitting is tight NOTE Using a small amount of Teflon tape on threads is a good idea to ensure a proper seal Locate coolant hose on throttle body shown above that will be used to supply coolant to AOS bottom Disconnect coolant hose from throttle body and install supplied 5 16 5 16 plastic adapter into hose Secure with OEM pinch clamp Install supplied 5 16 coolant hose to 5 16 plastic adapter and route hose to either coolant feed fitting on AOS bottom Cut hose to length install onto fitting and secure both ends using supplied 2 hose clamp NOTE During this step it is important to orient AOS bottom so coolant feed hoses have the cleanest path to engine DO NOT seal AOS bottom to body until final orientation has been settle on leave Coolant Feed E Conniecigg OM ais Side ANONY S Back P Cooki ion On Engine Actual routing of hoses may not be erent above Di
22. tightening as long as they are not backed off more than 1 8 of a turn RTV Notes e Included with your Air Oil Separator is a tube of Black Silicone RTV This is used as a back up to the quad seal type O ring to seal the microscopic pores and scratches that can cause small oil leaks e The O ring by itself is enough to create an air tight seal will pressure test ok but may not be enough to contain oil from seeping out of any small imperfections in the body of your Air Oil Separator So we HIGHLY recommend the use of RTV in the areas we describe e Just like Subaru uses RTV to seal valve covers oil pans engine blocks and precision machined surfaces we also incorporate the use of this in the PERRIN Air Oil Separator Included Parts with PERRIN Air Oil Separator for Top Mount Intercoolers e 1 PERRIN Universal Air Oil Separator AOS e 1 Quad Seal O ring e 1 Black Silicone RTV e 1 02 07 or 08 13 TMIC AOS Bracket e 1 Crank Case Vent Adapter e 9 1 2 Crank Case Vent Hose e 3 3 8 Fuel Injection Hose e 5 5 16 Coolant Hose e 4 5 16 Fuel Injection Hose e 9 3 Hose Clamps e 4 2 Hose Clamps e 2 27mm Hose Clamp e 1 1 2 Vacuum Cap e 2 3 8 NPT 1 2 Straight Plastic Fitting e 2 3 8 NPT 1 2 90 Degree Plastic Fitting e 1 1 4 NPT 3 8 Barb Straight Brass Fitting e 1 3 8 NPT 1 2 Barb Female Brass Fitting e 2 1 4 NPT 1 2 Barb Straight Plastic Fitting e 2 1
23. ure shows bracket mounted to chassis without AOS bolted to it This is done to clearly show how bracket is mounted to shock tower PERKINS 1U Bracket Insele On ewe WWIRX STI f Make sure AOS clears all OEM hoses lines and other things in engine bay g Temporarily adjust AOS bottom and its rotation Loosen bolt in bottom of AOS and adjust rotation of bottom so that threaded holes are accessible Further adjustments may need to be made in future steps h Over the next few steps it may be necessary to remove AOS from bracket to adjust orientation of bottom and fittings to better match your specific setup It is not necessary to tighten bracket fully until final step 4 Oil Drain Connection a The AOS oil drain is not an optional hook up as the AOS is not designed to contain oil within itself This fitting is used to drain the oil that is captured within the AOS body back to the engine through a crank case vent b Install supplied 5 16 90 degree nickel plated fitting into oil drain outlet in bottom of AOS keeping in mind that this needs to point downward slightly See NPT Notes above regarding installation of this fitting c Install supplied 1 2 90 degree black plastic fitting into crank case vent inlet on side of AOS body See NPT Notes above regarding installation of this fitting s PCV Diagnosis Connector E xK Connects To Intake PCV Manifold Below Junction Throttle Body rf M gill Turbo Inlet Hose Cr
24. utlet is the top threaded hole on body This connection needs to be connected to the turbo intake system This connection must be in front of the turbocharger and behind the air filter NOTE We do not recommend leaving this fitting open as some oil can still come out under certain conditions which can create a mess or combust if exposed to extreme heat Along this hose connecting AOS top to intake system you will need to install the PCV Y connection The PCV is a 1 way valve that provides positive crank case ventilation during idle and light load situations This valve is important to install as described or boost pressure will be lost and there will be no positive crankcase ventilation occurring NOTE The PCV connection can be skipped for certain applications see special note regarding this at bottom of instructions Locate PCV junction removed from engine block in earlier step and remove PCV valve from plastic housing as shown below NOTE This can be tight to remove and may require a vise to hold housing while fitting is unscrewed It may be necessary to use solvent or a thread penetrating oil to free from housing 02 03 WRX s can skip this step as the OEM PCV is threaded into intake manifold and a hose will be attached directly to this in later step Remove PCV Valve from OEM crank case fitting Install PCV valve into supplied female brass fitting and tighten down See NPT Notes above regarding installation of this fitting Thread OE
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