Oh No The Jägermobile Broke Today!

[Mark_T]

Shut it down immediately as there is a danger of hydro-locking a cylinder with oil, in which case a bent rod is the best you can hope for.

[healthservices]

Originally Posted by Mark_T

Shut it down immediately as there is a danger of hydro-locking a cylinder with oil, in which case a bent rod is the best you can hope for.

Danger of hydrolocking is low if the motor is running as the oil will go into the intake as a heavy vapor/mist not a full on liquid. Restarting after a tow maybe another matter as oil collected in intake may run off and pool into one of the cylinders, which is still unlikely. But better safe than sorry.

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[Jake Raby]

Engine braking produces the highest vacuum that the system can see. All you need is a manometer to attach to the oil cap to see these things.

And its all you need to check the health of an AOS.

[Frodo]

Originally Posted by Jake Raby

Engine braking produces the highest vacuum that the system can see. All you need is a manometer to attach to the oil cap to see these things.

And its all you need to check the health of an AOS.

Jake, is this something that basically any mechanic can quickly/easily do? Don't know if you've read any of my "AOS?" thread or not. I've got an appt to replace the AOS, but they're tied up for a couple of weeks before they can work on it. I'm just curious whether I can easily figure out if it's safe/advisable to drive the car in the meantime.

Any input appreciated

[Timco]

Originally Posted by Frodo

Jake, is this something that basically any mechanic can quickly/easily do? Don't know if you've read any of my "AOS?" thread or not. I've got an appt to replace the AOS, but they're tied up for a couple of weeks before they can work on it. I'm just curious whether I can easily figure out if it's safe/advisable to drive the car in the meantime.

Any input appreciated

Just get a manometer and drill / thread a tap into an extra oil cap. Some better meters record so it can be left in the trunk.

Just get one in PSI, not "WC.

[Frodo]

Sure...but who's got "an extra oil cap" layin' around? Not me

I'm a LONG way from wealthy (BELIEVE ME!), but at the moment I don't have lots of time on my hands. If having someone else quickly and reliably checking this for me is an available option, I'd jump at it.

[Frodo]

Originally Posted by Frodo

Jake, is this something that basically any mechanic can quickly/easily do? Don't know if you've read any of my "AOS?" thread or not. I've got an appt to replace the AOS, but they're tied up for a couple of weeks before they can work on it. I'm just curious whether I can easily figure out if it's safe/advisable to drive the car in the meantime.

Any input appreciated

NOBODY knows the answer to this

[Jager]

Originally Posted by Frodo

NOBODY knows the answer to this

Frodo,
You have multiple questions here. I can say any skilful mechanic can change out an AOS. You have to raise the car and work above and below the vehicle to remove and replace the AOS.
You can drive your Boxster if the AOS failure is minor, that is if the hole in the AOS diaphragm is small. I would guess many of us have driven our Boxsters for quite awhile with a failing AOS before the symptoms got worse, and then continued driving until we got the replacement part. The risk is if the hole gets bigger or the diaphragm tears while you are driving and there is a huge smoke screen behind you, shut down the motor ASAP.

[Frodo]

Thanks, Jager. I was actually curious about Jake's statement about assessing the health of someone's AOS (as in using a manometer on it). I've got an appointment to have it replaced and was just wondering how far down the 'failure path' it had gone. Based on what I told him, the mechanic who's gonna work on it said it was okay to drive it. But wanting to avoid the more catastrophic forms of AOS failure, I was hoping to get some sort of more quantitative measurement of how bad (or not bad) my AOS really is. (They can't work on it for a couple weeks.)

Yeah, I have no doubt these guys will do a good job on the replacement. Heck, given a few hours (I'm slow but persistent) I'm pretty sure I could change it. I've just got too much going on right now to tackle it.

Thanks again.

[cas951]

Frodo,
It's hard difficult to say that it's safe to drive the car with a bad AOS. This will depend on how bad the leak is and if it's affecting the way the nine is running. Do you have ny CEL codes? As Jäger mentioned most of us that have had AOS that have failed didn't know it untill it was already a large leak. Best advise is to have it replaced sooner than later and ont drive it untill it's been repaired. I had my failure just 6 months into ownership and didn't even know how to access the engine. Than I found this DIY bt Brad http://986forum.com/forums/general-discussions/18090-air-oil-seperator-write-up-5.html this used to have pictures but seems its no longer available.

I do have one tip in doing this. Most new AOS comes ith a new lower hose. The clamps that hold the hose are difficult to reach. Don't bother trying to loosen the clamp for this hose. Just cut the hose using a knife but with care o you don't damage anything else in there.

Hope this helps