Hi Guys,
My 2009
Cayman
base has 105K miles and the
AOS
has seen better days. Here's a video of how I replaced the unit. Total time was about 4 hours.
The car no longer smokes on startup and it idles better now.
Hope this helps the greater good!
Ian
nice video. thanks for sharing.
did yours squeal or make any noises before you replaced it?
I think so. I noticed this strange sound like a jet engine spinning down intermittently, just after turning the engine off. It hasn't made that noise since replacing the
AOS
.
Glad you like the video.
Video seems to be missing... or something is wrong at my end.. anyone currently see the video or a link to it?
Most likely you have a piece of software that is blocking the video from showing up. In the top bar of your browser you probably see a red x. Click on it and you should be able to force a load of the video.
The red 'x' saying it blocked running a script from an unauthenticated source? No thanks. Makes me wonder about who is hosting this video. In these times, opening your computer to allow a script from an unknown/anonymous source would be crazy.
Yup, I understand your perspective. I'm just saying if you really want to watch the video, that is how you do it
Peace.
It's hosted on YouTube, so it doesn't seem like it's that big of a deal....
I recently replaced the Air Oil Separator on my 2011
Cayman S
(
987.2
). The information in this thread was very useful including the video. I had a couple differences from the video. I ended up removing the
AOS
via the passenger opening to the engine compartment rather than the top engine opening. I'm not sure if it was just my inability to Rubik's cube the
AOS
out that way, or if the 3.4 liter engine is somehow making the gaps tighter than 2.9 liter.
This pic with colored arrows and comments for each arrow might be useful to those doing an
AOS
replacement.
Red Arrow
. There are two E10 star socket bolts holding the AOS to the engine. This is one of them. In my socket set the E10 is a 3/8" drive. It was pretty tight removing this because of the fit of the 3/8" socket wrench head. In fact most star socket sets go to 3/8" drive by the time they get to the E10 size. While not absolutely necessary for this job, I think having star sockets in 1/4" drive for larger sockets sizes can allow access to tighter spaces. I found this inexpensive set where all the sizes are 1/4" drive including the E10, E11 and E12.
TEMO 6 pc Torx Plus 6-12EP Socket 1/4 Inch (6.3 mm) Square Drive Auto Repair Impact Ready Tool - - Amazon.com
TEMO 6 pc Torx Plus 6-12EP Socket 1/4 Inch (6.3 mm) Square Drive Auto Repair Impact Ready Tool - - Amazon.com
www.amazon.com
The part number for the AOS unit seems to have been updated to:
OPB-115-099-A
. I was able to get it for $100 with my PCA discount at the local Porsche dealer.
Green Arrow
. This E10 bolt holds an assembly in for the black tube. I found it useful to remove the assembly to get the AOS out. The assembly has two O rings. I replaced these since I had the unit apart and I was getting the AOS anyway. Part number for both O rings:
999-707-316-41
.
Orange Arrow
. Removing the Temperature Sensor also makes the AOS removal possible. You unhook the electronic connector and use a 22mm socket with extensions and swivel to remove from the top of the engine. A little coolant might leak out. The temp sensor has a washer (Porsche calls it an O ring for some reason). Part number:
900-123-111-21
. I forgot to include this washer when I reinstalled the temp sensor and had coolant leaking out.
Blue Arrow
. Removing this tube makes the AOS removal possible.
There is also work that gets done at the top of the engine. My experience with this was the same at that in the video.
