How to replace your AOS Valve Porsche Cayman Boxster 3.4 air oil separator PCV 2009-2012 Gen 2 987.2
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- čas přidán 27. 03. 2021
- Porsche Cayman Gen2 987.2 AOS valve change. In this video I show you how to replace your Air Oil Separator Valve. Part number - P0PB115099A and costs approximately $75 inc vat from an OPC Porsche Centre
This is fairly straight forward and you don’t need that many tools.
First you will need to remove the top and side engine covers to gain access to the engine.
Step 2 is to remove the breather hose, there are two points at the plenum just after the throttle body and then the main connection at the valve.
Step 3 is to remove the two E10 bolts that hold it in place.
Step 4 pull the valve up, it’s quite though and will come out with a pop.
Step 5 is getting the valve out, this is a bit tricky and you need to get it out in a particular way. Turn the valve upside down and while bringing it out, turn it anti clockwise.
Fitting the new valve is the reverse order, just to note when pushing the valve in, it is rather tough. I started the two bolts to help line it up so it was correctly positioned and started to wind them in by hand. After that you can push it into place.
Job done... :)
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#Cayman
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Just used this video to change my AOS. Would have never figured out to rotate it. Great video!!
Great Video! Thanks to you my change out took only about an hour. Saved me some gas money.
Thank you very much for producing this video, changed my AOS at the weekend thanks to this video. At 6”4 it was a struggle working behind the seats, but I got there in the end!
Great work 👍🏼 glad it helped
three tips you can hold theo bolts, 1st you can tape the socket on the extension,then the socket won't drop. 2nd you can buy and use 8 mm magnet socket to start screw the bolts in, then use the taped socket to tighten. 3nd put the bolts into the AOS, then put a small o-ring on the bolts the put the AOS in. this idea is I see it on the subaru timing belt tensioner, it's o-ring like I said to hod the bolt and the washer.
Thanks bro
Great video again, I greatly appreciate. How did you get the rearward E10 bolt in place in the AOS bracket hole, without dropping it and it falling out of place where it could not be reached? Seems like a very tight space to get your fingers holding the E10 bolt into. Thank you
Hi Carl, thanks for all the comments, I used a magnet and placed it in, you can just about get it to turn one or two threads to pull it off without pulling the bolt back out. Another method is to use a bit of grease or tissue on the bolt head so it sticks in the socket. 👍🏼 all the best
I actually used a bit of super glue in the socket when I put that difficult back bolt in worked a treat just enough to stop it dropping off ..
Hey, its the same part for 987.2 2.9 ?
I have check as you show to check if there is oils on intake side from your previous video. I don't have any smoke issues and have very low miles on the engine but when I put my finger through AOS outlet, I came up with some oil on my finger. Does it should be totally dry or it might have some of oil in it???
Hey, thanks for the comments, you will always get some oil coming through unfortunately as it’s just the nature of the design, even with the additional catch can I fitted, after a while oil will start to form. As long as there’s no clouds of smoke and high oil consumption you’ll be fine. Most are changed as a precaution
I just pulled one of the hoses off of one side of my plenum and saw oil present in the plenum tube. Seemed to be only slightly less than you showed in your previous video. No smoke from the exhaust and engine runs great still. But AOS change coming to avoid bigger future problem..
I was thinking my oil change refill procedure may be a contributor. I refill the last 500 ml very slowly, only adding 50 ml at a time once the gage reading is one bar short of being totally full. DO you think if a person was to only fill with fresh oil until reaching 75% of the way from min to max on the dash gage that that would help the AOS survive longer since there would be less oil vapor churning in the crankcase?
Difficult to say really, I’d rather have the oil topped up to the max as you wouldn’t want to then introduce any oil starvation particularly if you are doing any fast road driving with sweeping corners etc. I’ll also be adding an oil catch can to the system just to minimise any oil vapour which does pass the AOS valve. I’ll add that video shortly.
@@GarageTechAutomotive Great idea. That will be so much easier to service, I'll be so looking forward to that video. Thanks for all your great work and help.
is the AOS the same as the intake manifold tuning valve control?
Hey, no the AOS is the Air Oil Separator, it filters out the oil particles from the crankcase gases before they’re returned back to the intake. The intake manifold valves, control the flaps inside the intake l, which effectively changes the the length of the manifold 👍🏼
Novice question, what did you use as lubricant on the new valve?
A touch of clean engine oil is best, or a spray of WD40 will do the trick 👍🏼
@@GarageTechAutomotive thank you very much! Very helpful video.
I replaced mine too but still smoke
Yeah these ome AOS valves aren’t great, I’ve added a catch tank to the system to help reduce the oil getting into the intake. If you haven’t done so already, I’d recommend cleaning out the pipes as there will be oil within there still getting drawn through.
This video shows how much oil a catch can on a 2010 Cayman S collects after installing a new AOS valve from Porsche,
czcams.com/video/xTFQV7R964k/video.html
Really surprises me.
I say delete that rat… caramelizes the backs of the valves